HomeMy WebLinkAboutWater/Drainage Report p McCLURE & BROWNE, ENGINEERING/SURVEYING, INC.
U u D 1008 Woodcreek Dr.,Suite 103 College Station,Tx.77845.(979)693-3838 Engineer Reg.No.F-458
1314 10th Street,Suite 210 Huntsville,Tx.77320•(936)294-9749 Survey Reg.No.101033-00
July 28, 2015
Mr. Kevin Ferrer
City of College Station
Post Office Box 9960
College Station, TX 77842
Re.: LETTER ACKNOWLEDGING CITY STANDARDS
Duck Haven Phase 8
MBESI No. 1062-0051
Dear Mr. Ferrer:
The purpose of this letter is to acknowledge that the construction plans for the street, drainage,
water, sidewalk, and sanitary sewer for the above-referenced project, to the best of my
knowledge, do not deviate from the B/CS Design Guideline Manual except as follows:
I also acknowledge, to the best of my knowledge, that the details provided in the construction
plans are in accordance with the Bryan/College Station Standard Details.
Sincerely,
�I-I
t L. Robertson, PE
Duck Haven Phase 8
MBESI PROJ#: 1062-0051
Engineer's Opinion of Probable Construction Costs
July 29, 2015
Item# Description Unit Quantity Unit Price Total
Paving Construction
1 Site Preparation(includes clearing&grubbing) Ac. 3.041 $1,500.00 $4,560.00
2 Earthwork(Excavation and Embankment for Public ROW, L.S. 1 $30,000.00 $30,000.00
Common Area, and Lots+/-3,355 CY)
3 ,6" Lime Stabilized Subgrade(6%by weight) S.Y. 3,830 $4.25 $16,277.50
4 6" Crushed Stone Base S.Y. 3,413 $12.00 $40,956.00
5 2" HMAC Pavement S.Y. 2,785 $12.00, $33,420.00
Paving Subtotal $125,214
Drainage System Construction
6 124" RCP Pipe, (ASTM C-76, CL III) (Structural Backfill) L.F. 50 $55.001 $2,750.00
7 24" HDPE Pipe(ADS N-12 or equivalent) L.F. 354 $50.00 $17,700.00
8 3'x3' Grate Inlet EACH 1 $3,500.00 $3,500.00
9 Rock Rip Rap S.Y. 33 $40.00 $1,320.00
10 Safety End Treatment for 24" Pipe EACH 6 $900.00, $5,400.00
Drainage System Subtotal j $30,670
Water System Construction
11 6" PVC, C900 Cl 200, Water Line L.F. 497 $25.00 $12,418.75
12 4" PVC, C900 Cl 200, Water Line L.F. 367 $21.00 $7,715.82
13 4"M.J. Bend EACH 1', $300.00 $300.00
14 6"x4"M.J. Reducer EACH 1 $350.00 $350.00
15 6" M.J. Anchor Coupling EACH 1 $350.00 $350.00
16 Fire Hydrant Assembly EACH 1, $3,600.00: $3,600.00
17 4"x22.5 deg Bend EACH , 1 $450.00 $450.00
18 6" Gate Valve EACH 1 $1,250.00 $1,250.00
19 Blow-off Assembly EACH 1 $1,000.00 $1,000.00
20 Water Service, 1.0" type K Copper,long side(>20') EACH 1 $1,400.00 $1,400.00
21 Water Service, 1.5" type K Copper, long side(>20') I EACH , 2 $1,500.00 $3,000.00
Water System Subtotal $31,835
Erosion Control Construction
22 ,Erosion Control Plan&Sedimentation Control(per Item L.S. 1 $4,000.00 $4,000.00
106) (includes monitoring, record keeping, and cleanup) -
23 Grass Seeding SY 10,893 $0.36 $3,921.48
24 Straw Bale Barrier EACH 12 $75.00 $900.00
25 Silt Fence L.F. 600 $3.00 $1,800.00
26 Headwall Protection EACH 4, $200.00 $800.00
27 Entrance/Exit EACH 11 $1,500.00 $1,500.00
Erosion Control Subtotal $12,921
Construction Cost $200,640
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WATER REPORT
FOR
Duck Haven Subdivision
Phase 7 & 8
Brazos County, Texas
MARCH 2015
MBESI# 1062-0044 & 0051
----\/1D
McCLURE & BROWNE ENGINEERING/SURVEYING, INC.
V1008 Woodcreek Dr.,Suite 103•College Station,Tx.77845•(979)693-3838 Engineer Reg.No.F-458
Survey Reg.No. 101033-00
WATER SYSTEM ANALYSIS
for
DUCK HAVEN PHASE 7 & 8
General Information
Anticipated land use: Residential
Anticipated number of lots: 23 lots
Notes on surrounding development: This development is located near the existing Phase
1 of Duck Haven in South Brazos County.
Water System Analysis
Primary water supply line: Existing 8" line on Canvasback Cove
Software model: PIPE2000 (Kentucky Pipe Network Model)
Average daily flow: 34.5 gpd (all lots combined)
Estimated fire demand: 1,000 gpm (at Junction J-12)
Pipe material: PVC (C909)
Regulated Items Designed Requirement Notes
Min_Pressure(psi) 61.62 I 20 (min) I Fire flow conditions (J-5)
Max Velocity75
(�s) 11.....-... _._._..___.._..._._......._. 12 (max) _ Fire flow conditions (P-6)
Conclusion: The proposed water system exceeds the requirements of TCEQ
and the City of College Station
Applicable Exhibits:
Exhibit A Schematic Water System Layout -.t..,
Exhibit B Static Flow Model Output
Exhibit C Fire Flow Model Output
6 '
Vii` ',
II
Duck Haven, Phase 7& 8
MBESI#10620044&0051
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WAFER LDDI LIP
EXHIBIT A
EXHIBIT B
Static Flow Analysis
* * * * * * * * * * K Y P I P E 5 * * * * * * * * * *
* *
* Pipe Network Modeling Software *
* *
* Copyrighted by KYPIPE LLC *
* Version 5 - February 2010 *
* *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Date & Time: Tue Mar 17 11:01:11 2015
Master File : f:\1062 - clarke & wyndham inc\0044 - duck haven phase 7\docs\water model
stat.KYP\water model stat.P2K
************************************************
SUMMARY OF ORIGINAL DATA
************************************************
U NITS SPECIFIED
FLOWRATE = gallons/minute
HEAD (HGL) = feet
PRESSURE = psig
P IPELINE DATA
STATUS CODE: XX -CLOSED PIPE CV -CHECK VALVE
P IPE NODE NAMES LENGTH DIAMETER ROUGHNESS MINOR
N AME #1 #2 (ft) (in) COEFF. LOSS COEFF.
P-1 VP-1 J-1 84.00 8.00 139.4518 0.00
P-2 J-1 J-2 530.00 6.00 139.4518 0.00
P-3 3-2 J-7 675.00 6.00 140.0000 0.00
9-4 J-4 J-3 340.00 4.00 140.0000 0.00
P-5 J-5 0-4 900.00 6.00 140.0000 0.00
9-6 J-6 3-5 500.00 6.00 140.0000 0.00
P-7 J-7 3-6 2047.00 6.00 140.0000 0.00
9-8 J-6 VP-3 1200.00 8.00 140.0000 0.00
P UMP/LOSS ELEMENT DATA
THERE IS A DEVICE AT NODE VP-1 DESCRIBED BY THE FOLLOWING DATA: (ID= 1)
HEAD FLOWRATE EFFICIENCY
(ft) (ppm) (°s)
203.77 0.00 75.00
181.15 1500.00 75.00
122.13 3000.00 75.00
THERE IS A DEVICE AT NODE VP-3 DESCRIBED BY THE FOLLOWING DATA: (ID= 2)
HEAD FLOWRATE EFFICIENCY
(ft) (gpm) (a)
212.31 0.00 75.00
173.08 1250.00 75.00
70.68 2500.00 75.00
N ODE DATA
NODE NODE EXTERNAL JUNCTION EXTERNAL
NAME TITLE DEMAND ELEVATION GRADE
(gpm) (ft) (ft)
J-1 0.00 283.00
J-2 11.25 284.00
J-3 12.00 302.00
J-4 12.00 300.00
J-5 12.00 306.00
J-6 18.00 304.00
J-7 0.00 272.00
VP-1 ---- 282.00 282.00
VP-3 ---- 312.00 312.00
O UTPUT OPTION DATA
OUTPUT SELECTION: ALL RESULTS ARE INCLUDED IN THE TABULATED OUTPUT
MAXIMUM AND MINIMUM PRESSURES = 4
MAXIMUM AND MINIMUM VELOCITIES = 5
MAXIMUM AND MINIMUM HEAD LOSS/1000 = 5
S YSTEM CONFIGURATION
NUMBER OF PIPES (p) = 8
NUMBER OF END NODES (j) = 7
NUMBER OF PRIMARY LOOPS (1) = 0
NUMBER OF SUPPLY NODES (f) = 2
NUMBER OF SUPPLY ZONES (z) = 1
Case: 0
RESULTS OBTAINED AFTER 19 TRIALS: ACCURACY = 0.00000
S IMULATION DESCRIPTION (LABEL)
P IPELINE RESULTS
STATUS CODE: XX -CLOSED PIPE CV -CHECK VALVE
P IPE NODE NUMBERS FLOWRATE HEAD MINOR LINE HL+ML/ HL/
N AME #1 #2 LOSS LOSS VELO. 1000 1000
(gpm) (ft) (ft) (ft/s) (ft/ft) (ft/ft)
P-1 VP-1 J-1 0.00 0.00 0.00 0.00 0.00 0.00
P-2 J-1 J-2 0.00 0.00 0.00 0.00 0.00 0.00
P-3 J-2 J-7 -11.25 0.01 0.00 0.13 0.02 0.02
P-4 J-4 J-3 12.00 0.04 0.00 0.31 0.13 0.13
P-5 J-5 J-4 24.00 0.06 0.00 0.27 0.06 0.06
P-6 J-6 J-5 36.00 0.07 0.00 0.41 0.14 0.14
P-7 J-7 J-6 -11.25 0.03 0.00 0.13 0.02 0.02
P-8 J-6 VP-3 -65.25 0.12 0.00 0.42 0.10 0.10
P U M P/L OSS ELEMENT RESULTS
INLET OUTLET PUMP EFFIC- USEFUL INCREMTL TOTAL *PUMPS #PUMPS
NPSH
NAME FLOWRATE HEAD HEAD HEAD ENCY POWER COST COST PARALLEL SERIES
Avail.
(Ppm) (ft) (ft) (ft) (%) (Hp) ($) ($)
(ft)
Device "VP-1" is closed
VP-1 0.00 0.00 241.98 0.0 75.00 0. 0.0 0.0 ** **
33.2
VP-3 65.25 0.00 212.14 212.1 75.00 0. 0.0 0.0 ** **
33.2
NODE RESULTS
NODE NODE EXTERNAL HYDRAULIC NODE PRESSURE NODE
NAME TITLE DEMAND GRADE ELEVATION HEAD PRESSURE
(Ppm) (ft) (ft) (ft) (psi)
J-1 0.00 523.98 283.00 240.98 104.42
J-2 11.25 523.98 284.00 239.98 103.99
J-3 12.00 523.85 302.00 221.85 96.13
J-4 12.00 523.89 300.00 223.89 97.02
J-5 12.00 523.95 306.00 217.95 94.45
J-6 18.00 524.02 304.00 220.02 95.34
J-7 0.00 523.99 272.00 251.99 109.19
VP-1 ---- 523.98 282.00 241.98 104.86
VP-3 ---- 524.14 312.00 212.14 91.93
MAXIMUM AND MINIMUM VALUES
P RESSURES
JUNCTION MAXIMUM JUNCTION MINIMUM
NUMBER PRESSURES NUMBER PRESSURES
(psi) (psi)
J-7 109.19 VP-3 91.93
VP-1 104.86 J-5 94.45
J-1 104.42 J-6 95.34
J-2 103.99 J-3 96.13
✓ ELOCITIES
PIPE MAXIMUM PIPE MINIMUM
NUMBER VELOCITY NUMBER VELOCITY
(ft/s) (ft/s)
P-8 0.42 P-3 0.13
P-6 0.41 P-7 0.13
P-4 0.31 P-5 0.27
H L + M L / 1 0 0 0
PIPE MAXIMUM PIPE MINIMUM
NUMBER HL+ML/1000 NUMBER HL+ML/1000
(ft/ft) (ft/ft)
P-6 0.14 P-3 0.02
P-4 0.13 P-7 0.02
P-8 0.10 P-5 0.06
H L / 1 0 0 0
PIPE MAXIMUM PIPE MINIMUM
NUMBER HL/1000 NUMBER HL/1000
(ft/ft) (ft/ft)
P-6 0.14 P-3 0.02
P-4 0.13 P-7 0.02
P-8 0.10 P-5 0.06
SUMMARY OF INFLOWS AND OUTFLOWS
(+) INFLOWS INTO THE SYSTEM FROM SUPPLY NODES
(-) OUTFLOWS FROM THE SYSTEM INTO SUPPLY NODES
NODE FLOWRATE NODE
NAME (ppm) TITLE
VP-3 65.25
NET SYSTEM INFLOW = 65.25
NET SYSTEM OUTFLOW = 0.00
NET SYSTEM DEMAND = 65.25
***** HYDRAULIC ANALYSIS COMPLETED *****
Exhibit C
Fire Flow Analysis
* * * * * * * * * * K Y PE5 * * * * * * * * * *
*
* Pipe Network Modeling Software
* *
* Copyrighted by KYPIPE LLC
* Version 5 - February 2010
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Date & Time: Tue Mar 17 10:56:13 2015
Master File : f:\1062 - clarke & wyndham inc\0044 - duck haven phase 7\docs\water model
fire.KYP\water model fire.P2K
************************************************
SUMMARY OF ORIGINAL DATA
************************************************
U NITS SPECIFIED
FLOWRATE = gallons/minute
HEAD (HGL) = feet
PRESSURE = psig
P IPELINE DATA
STATUS CODE: XX -CLOSED PIPE CV -CHECK VALVE
P IPE NODE NAMES LENGTH DIAMETER ROUGHNESS MINOR
N AME #1 #2 (ft) (in) COEFF. LOSS COEFF.
0-1 VP-1 J-1 84.00 8.00 139.4518 0.00
P-2 J-1 J-2 530.00 6.00 139.4518 0.00
P-3 J-2 0-7 675.00 6.00 140.0000 0.00
P-4 J-4 J-3 340.00 4.00 140.0000 0.00
P-5 J-5 0-4 900.00 6.00 140.0000 0.00
P-6 0-6 J-5 500.00 6.00 140.0000 0.00
P-7 0-7 J-6 2047.00 6.00 140.0000 0.00
P-8 J-6 VP-3 1200.00 8.00 140.0000 0.00
P U M P/L OSS ELEMENT DATA
THERE IS A DEVICE AT NODE VP-1 DESCRIBED BY THE FOLLOWING DATA: (ID= 1)
HEAD FLOWRATE EFFICIENCY
(ft) (gpm) (%)
203.77 0.00 75.00
181.15 1500.00 75.00
122.13 3000.00 75.00
THERE IS A DEVICE AT NODE VP-3 DESCRIBED BY THE FOLLOWING DATA: (ID= 2)
HEAD FLOWRATE EFFICIENCY
(ft) (gpm) (%)
212.31 0.00 75.00
173.08 1250.00 75.00
70.68 2500.00 75.00
N ODE DATA
NODE NODE EXTERNAL JUNCTION EXTERNAL
NAME TITLE DEMAND ELEVATION GRADE
(gpm) (ft) (ft)
J-1 0.00 283.00
J-2 11.25 284.00
J-3 12.00 302.00
J-4 12.00 300.00
J-5 1012.00 306.00
J-6 18.00 304.00
J-7 0.00 272.00
VP-1 ---- 282.00 282.00
VP-3 ---- 312.00 312.00
O UTPUT OPTION DATA
OUTPUT SELECTION: ALL RESULTS ARE INCLUDED IN THE TABULATED OUTPUT
MAXIMUM AND MINIMUM PRESSURES = 4
MAXIMUM AND MINIMUM VELOCITIES = 5
MAXIMUM AND MINIMUM HEAD LOSS/1000 = 5
S YSTEM CONFIGURATION
NUMBER OF PIPES (p) = 8
NUMBER OF END NODES (j) = 7
NUMBER OF PRIMARY LOOPS (1) = 0
NUMBER OF SUPPLY NODES (f) = 2
NUMBER OF SUPPLY ZONES (z) = 1
Case: 0
RESULTS OBTAINED AFTER 5 TRIALS: ACCURACY = 0.00000
SIMULATION DESCRIPTION (LABEL)
P IPELINE RESULTS
STATUS CODE: XX -CLOSED PIPE CV -CHECK VALVE
P IPE NODE NUMBERS FLOWRATE HEAD MINOR LINE HL+ML/ HL/
N AME #1 #2 LOSS LOSS VELO. 1000 1000
(gpm) (ft) (ft) (ft/s) (ft/ft) (ft/ft)
P-1 VP-1 2-1 107.55 0.02 0.00 0.69 0.26 0.26
P-2 J-1 2-2 107.55 0.56 0.00 1.22 1.05 1.05
9-3 J-2 2-7 96.30 0.57 0.00 1.09 0.85 0.85
P-4 J-4 J-3 12.00 0.04 0.00 0.31 0.13 0.13
P-5 J-5 J-4 24.00 0.06 0.00 0.27 0.06 0.06
9-6 J-6 J-5 1036.00 34.51 0.00 11.75 69.02 69.02
P-7 J-7 J-6 96.30 1.74 0.00 1.09 0.85 0.85
P-8 J-6 VP-3 --957.70 17.64 0.00 6.11 14.70 14.70
P U M P/L OSS ELEMENT RESULTS
INLET OUTLET PUMP EFFIC- USEFUL INCREMTL TOTAL #PUMPS *PUMPS
NPSH
NAME FLOWRATE HEAD HEAD HEAD ENCY POWER COST COST PARALLEL SERIES
Avail.
(ppm) (ft) (ft) (ft) (%) (Hp) ($) ($)
(ft)
VP-1 107.55 0.00 203.60 203.6 75.00 0. 0.0 0.0 ** **
33.2
VP-3 957.70 0.00 188.35 188.4 75.00 0. 0.0 0.0 ** **
33.2
NODE RESULTS
NODE NODE EXTERNAL HYDRAULIC NODE PRESSURE NODE
NAME TITLE DEMAND GRADE ELEVATION HEAD PRESSURE
(gpm) (ft) (ft) (ft) (psi)
J-1 0.00 485.58 283.00 202.58 87.78
J-2 11.25 485.02 284.00 201.02 87.11
J-3 12.00 448.10 302.00 146.10 63.31
J-4 12.00 448.14 300.00 148.14 64.20
J-5 1012.00 448.20 306.00 142.20 61.62
3-6 18.00 482.71 304.00 178.71 77.44
J-7 0.00 484.45 272.00 212.45 92.06
VP-1 ---- 485.60 282.00 203.60 88.23
VP-3 ---- 500.35 312.00 188.35 81.62
MAXIMUM AND MINIMUM VALUES
P RESSURES
JUNCTION MAXIMUM JUNCTION MINIMUM
NUMBER PRESSURES NUMBER PRESSURES
(psi) (psi)
J-7 92.06 J-5 61.62
VP-1 88.23 J-3 63.31
J-1 87.78 J-4 64.20
J-2 87.11 J-6 77.44
✓ ELOCITIES
PIPE MAXIMUM PIPE MINIMUM
NUMBER VELOCITY NUMBER VELOCITY
(ft/s) (ft/s)
P-6 11.75 P-5 0.27
P-8 6.11 P-4 0.31
P-2 1.22 P-1 0.69
P-3 1.09 P-3 1.09
P-7 1.09 P-7 1.09
H L + M L / 1 0 0 0
PIPE MAXIMUM PIPE MINIMUM
NUMBER HL+ML/1000 NUMBER HL+ML/1000
(ft/ft) (ft/ft)
P-6 69.02 P-5 0.06
P-8 14.70 P-4 0.13
P-2 1.05 P-1 0.26
P-7 0.85 P-3 0.85
H L / 1 0 0 0
PIPE MAXIMUM PIPE MINIMUM
NUMBER HL/1000 NUMBER HL/1000
(ft/ft) (ft/ft)
P-6 69.02 P-5 0.06
P-8 14.70 P-4 0.13
P-2 1.05 P-1 0.26
P-7 0.85 P-3 0.85
SUMMARY OF INFLOWS AND OUTFLOWS
(+) INFLOWS INTO THE SYSTEM FROM SUPPLY NODES
(-) OUTFLOWS FROM THE SYSTEM INTO SUPPLY NODES
NODE FLOWRATE NODE
NAME (gpm) TITLE
VP-1 107.55
VP-3 957.70
NET SYSTEM INFLOW = 1065.25
NET SYSTEM OUTFLOW = 0.00
NET SYSTEM DEMAND = 1065.25
***** HYDRAULIC ANALYSIS COMPLETED *****
DRAINAGE REPORT
FOR
DUCK HAVEN SUBDIVISION
PHASE 8
July 2015
PREPARED FOR:
- SMILING MALLARD DEVELOPMENT, LTD.
3608 EAST 29TH STREET
BRYAN, TEXAS 77802
979-846-4384
MBESI No. 10620051
pp McCLURE & BROWNE ENGINEERING/SURVEYING, INC.
Ot • 1008 Woodcreek Dr.,Suite 103•College Station,Tx.77845•(979)693-3838 Engineer Reg.No.F-458
Survey Reg.No.101033-00
-J , .
Duck Haven Subdivision, Phase 8
Stormwater Management Technical Design Summary Report
MBESI No. 10620051
PART 1—Executive Summary Report
Section 1 —Contact Information
Project Designer: McClure and Browne Engineering and Surveying, Inc.
1008 Woodcreek Drive, Suite 103
College Station,TX 77845
979-693-3838
Project Developer: Smiling Mallard Development,Ltd.
3608 East 29th Street
Bryan, Texas 77802
Section 2—General Information and Project Location
This development is the 8th phase of a multiphase subdivision. Phase 8 consists of 13 lots. The phase
is located in the Duck Haven Village which is along FM 2154 (Wellborn Road). Phase 8 is located near
the intersection of Drake Drive and Wigeon Trail Drive. This phase of the subdivision has been
analyzed as part of the Phase 5 Drainage Report submitted in October, 2007. The development is
entirely located within the Brazos County limits.
The project site is in the Peach Creek watershed. According to the Flood Insurance Rate Maps for
Brazos County, Texas and incorporated area, Map Number 48041C0375E effective May 16, 2012; no
portion of this property is located in a 100-year flood hazard area.
Culvert pipe calculations are shown with this submittal.
The culverts and ditches peak runoffs were found using the Rational Method. A runoff coefficient (c) of
0.50 was used for residential areas since all the lots have an area greater than 1 acre. The culverts and
ditches were analyzed using Microsoft Excel spreadsheets which utilizes Manning's Equation for the
analysis.
Drainage Report 1
Duck Haven Subdivision, Phase 8
Section 3 —Detention Pond Results Table
Pond Design Summary
Primary Outlet Structure—2—24" HDPE Pipes
Secondary Outlet Structure—Spillway @ Elevation 288.50'
Top of Berm—291.14' (6-inches above plugged condition 100 year water surface elevation)
Detention Pond Results Table
Year Existing Flowrate Proposed Flowrate Pond Elevation Freeboard
5 48.14 cfs 48.04 cfs 288.75' 2.39'
10 54.60 cfs 53.84 cfs 289.05' 2.29'
25 62.34 cfs 62.62 cfs 289.29' 1.85'
50 70.69 cfs 70.13 cfs 289.70' 1.44'
100 74.18 cfs 72.98 cfs 289.84' 1.30'
100-PLUGGED 290.62' 0.52'
Section 4—Reference
Exhibit A Technical Design Summary
Exhibit B-1 Drainage Area Map—Culverts and Ditches
Exhibit B-2 Drainage Area Map—Detention Pond(Existing)
Exhibit B-3 Drainage Area Map—Detention Pond (Proposed)
Exhibit C-1 Drainage Area Calculations—Culverts and Ditches
Exhibit C-2 Drainage Area Calculations—Detention Pond
Exhibit C-3 Culvert Calculations
Exhibit C-4 Detention Pond Calculations
Drainage Report 2
Duck Haven Subdivision,Phase 8
EXHIBITS
Drainage Report
Duck Haven Subdivision, Phase 8
EXHIBIT A
Technical Design Summary
Drainage Report
Duck Haven Subdivision, Phase 8
SECTION IX
APPENDIX D — TECHNICAL DESIGN SUMMARY
The Cities of Bryan and College Station both require storm drainage design to follow these
Unified Stormwater Design Guidelines. Paragraph C2 of Section III (Administration) requires
submittal of a drainage report in support of the drainage plan (stormwater management plan)
proposed in connection with land development projects, both site projects and subdivisions.
That report may be submitted as a traditional prose report, complete with applicable maps,
graphs, tables and drawings, or it may take the form of a "Technical Design Summary". The
format and content for such a summary report shall be in substantial conformance with the
description in this Appendix to those Guidelines. In either format the report must answer the
questions (affirmative or negative) and provide, at minimum, the information prescribed in the
"Technical Design Summary" in this Appendix.
The Stormwater Management Technical Design Summary Report shall include several parts
as listed below. The information called for in each part must be provided as applicable. In
addition to the requirements for the Executive Summary, this Appendix includes several
pages detailing the requirements for a Technical Design Summary Report as forms to be
completed. These are provided so that they may be copied and completed or scanned and
digitized. In addition, electronic versions of the report forms may be obtained from the City.
Requirements for the means (medium) of submittal are the same as for a conventional report
as detailed in Section III of these Guidelines.
Note: Part 1 — Executive Summary must accompany any drainage report
required to be provided in connection with any land development project,
regardless of the format chosen for said report.
Note: Parts 2 through 6 are to be provided via the forms provided in this
Appendix. Brief statements should be included in the forms as requested,
but additional information should be attached as necessary.
Part 1 — Executive Summary Report
Part 2— Project Administration
Part 3— Project Characteristics
Part 4— Drainage Concept and Design Parameters
Part 5— Plans and Specifications
Part 6— Conclusions and Attestation
STORMWATER MANAGEMENT TECHNICAL DESIGN SUMMARY REPORT
Part 1 — Executive Summary
This is to be a brief prose report that must address each of the seven areas listed below.
Ideally it will include one or more paragraphs about each item.
1. Name, address, and contact information of the engineer submitting the report, and
of the land owner and developer (or applicant if not the owner or developer). The
date of submittal should also be included.
2. Identification of the size and general nature of the proposed project, including any
proposed project phases. This paragraph should also include reference to
applications that are in process with either City: plat(s), site plans, zoning requests,
STORMWATER DESIGN GUIDELINES Page 1 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
or clearing/grading permits, as well as reference to any application numbers or
codes assigned by the City to such request.
3. The location of the project should be described. This should identify the Named
Regulatory Watershed(s) in which it is located, how the entire project area is
situated therein, whether the property straddles a watershed or basin divide, the
approximate acreage in each basin, and whether its position in the Watershed
dictates use of detention design. The approximate proportion of the property in the
city limits and within the ETJ is to be identified, including whether the property
straddles city jurisdictional lines. If any portion of the property is in floodplains as
described in Flood Insurance Rate Maps published by FEMA that should be
disclosed.
4. The hydrologic characteristics of the property are to be described in broad terms:
existing land cover; how and where stormwater drains to and from neighboring
properties; ponds or wetland areas that tend to detain or store stormwater; existing tvi
creeks, channels, and swales crossing or serving the property; all existing drainage
easements (or ROW) on the property, or on neighboring properties if they service
runoff to or from the property.
5. The general plan for managing stormwater in the entire project area must be
outlined to include the approximate size, and extent of use, of any of the following
features: storm drains coupled with streets; detention / retention facilities; buried to
conveyance conduit independent of streets; swales or channels; bridges or culverts;
outfalls to principal watercourses or their tributaries; and treatment(s) of existing
watercourses. Also, any plans for reclaiming land within floodplain areas must be
outlined. ""
6. Coordination and permitting of stormwater matters must be addressed. This is to
include any specialized coordination that has occurred or is planned with other
entities (local, state, or federal). This may include agencies such as Brazos County
government, the Brazos River Authority, the Texas A&M University System, the
Texas Department of Transportation, the Texas Commission for Environmental
Quality, the US Army Corps of Engineers, the US Environmental Protection Agency,
et al. Mention must be made of any permits, agreements, or understandings that
pertain to the project.
7. Reference is to be made to the full drainage report (or the Technical Design
Summary Report) which the executive summary represents. The principal
elements of the mann report (and its length), including any maps, drawings or
construction documents, should be itemized. An example statement might be: 0
"One -page drainage report dated , one set of
construction drawings ( sheets) dated , and a
-page specifications document dated comprise ,,.
the drainage report for this project."
VP
Pro
STORMWATER DESIGN GUIDELINES Page 2 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
p
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 2 — Project Administration Start (Page 2.1)
Engineering and Design Professionals Information
Engineering Firm Name and Address: Jurisdiction
McClure & Browne Engineering/Surveying, Inc. City: Bryan
1008 Woodcreek Drive, Suite 103 X College Station
College Station, Texas 77845 Date of Submittal:
(979) 693-3838
Lead Engineer's Name and Contact Info.(phone, e-mail, fax): Other:
Jeffery L. Robertson, P.E.
Supporting Engineering/Consulting Firm(s): Other contacts:
Developer/Owner/Applicant Information
Developer/Applicant Name and Address: Phone and e-mail:
Smiling Mallard Development, Ltd. (979) 846-4384
3608 East 29th Street
Bryan, Texas 77802
Property Owner(s) if not Developer/ Applicant(& address): Phone and e-mail:
Project Identification
Development Name: Duck Haven, Phase 8
Is subject property a site project, a single-phase subdivision, or part of a multi-phase subdivision?
Multi-phase Subdivision If multi-phase, subject property is phase 8 of
Legal description of subject property (phase) or Project Area:
(see Section II, Paragraph B-3a)
Duck Haven, Phase 8
If subject property (phase) is second or later phase of a project, describe general status of all
earlier phases. For most recent earlier phase Include submittal and review dates.
The project is the 8th phase of a multiphase subdivision. At this time the first phases have
been built. The most recent phase submitted was Ph. 7.
General Location of Project Area, or subject property (phase):
Project site is located near the intersection of Wigeon Trail and Drake Drive in Brazos
County, Texas.
In City Limits? Extraterritorial Jurisdiction (acreage):
Bryan: acres. Bryan: College Station: 19.122
College Station: acres. Acreage Outside ETJ:
STORMWATER DESIGN GUIDELINES Page 3 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 2 — Project Administration Continued (page 2.2)
Project Identification (continued)
Roadways abutting or within Project Area or Abutting tracts, platted land, or built
subject property: developments:
Widgeon Trail Drive Duck Haven, Phase 4
Duck Haven, Phase 5
Duck Haven, Phase 7
Named Regulatory Watercourse(s) &Watershed(s): Tributary Basin(s):
Phase 8 is located in the Franks Creek and Boggy The nearest tributary is Peach Creek S.
Creek Watersheds. Tributary 7.2 (See FEMA Map 48041C0375E) .
Plat Information For Project or Subject Property(or Phase)
Preliminary Plat File#: _ Final Plat File#: Date:
Name: Pending Approval Status and Vol/Pg: Pending Approval
If two plats, secorlth rrte----__________
Status: �—
Date:.
Zoning Information For Project or Subject Property(or Phase)
Zoning Type: Existing or Proposed? Case Code:
Case Date Status:
Zoning Type: Existing or Proposed? Case Code:
Case Date Status:
Stormwater Management Planning For Project or Subject Property(or Phase)
nning Conference(s) & Date(s): Participants:
•
Preliminary Report Require Submittal Date 'eview Date
Review Comments Addressed? Yes No In Wr ' g? When?
Compliance With Preliminary Drainage R•=.rt. : efly describe (or attach documentation
explaining) any deviation(s) from provisions of P - inary Drainage Report, if any. �<
P
STORMWATER DESIGN GUIDELINES Page 4 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 2 — Project Administration Continued (page 2.3)
Coordination For Project or Subject Property(or Phase)
Note: For any Coordination of stormwater matters indicated below, attach documentation
describing and substantiating any agreements, understandings, contracts, or approvals.
Coordina i
Dept. Contact: Date: Subject:
With Other
Departments of
Jurisdiction
City (Bryan or
College Station
Coordination With mmarize need(s) & actions taken (include contacts &dates):
Non-jurisdiction
City Needed?
Yes No X
Coordination with Summarize need(s : actions taken (include contacts : dates):
Brazos County
Needed?
Yes No X
Coordination with Summarize need(s) & actions take. in de contacts & dates):
TxDOT Needed?
Yes No X
Coordination with Summarize ne=. s) & actions taken (include contacts & da - :
TAMUS Needed?
Yes No X
Permits For Project or Subject Property(or Phase)
As to stormwater management, are permits required for the proposed work from any of the entities
listed below? If so, summarize status of efforts toward that objective in spaces below.
Entity Permitted or Status of Actions (include dates)
Approved ?
US Army Crops of
Engineers
No X Yes
US Environmental
Protection Agency
No X Yes
Texas Commission on A Stormwater Pollution Prevention Plan must be
Environmental Quality implemented prior to the start of construction
No Yes X according to TPDES General Permit No. TXR150000.
Brazos River
Authority
No X Yes
STORMWATER DESIGN GUIDELINES Page 5 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 3 — Property Characteristics Start (Page 3.1)
Nature and Scope of Proposed Work
Existing: Land proposed for development currently used, including extent of impervious cover?
Existing undeveloped land. Existing impervious cover is
approximately 0 sf.
Site evelopment of one platted lot, or two or more adjoining pla -: • s.
Development Building on a e platted lot of undeveloped la.•.
Project Building on two or more pla - - -d'•' g lots of undeveloped land.
(select all
applicable) Building on a single • , • adjoining lots, - - •ro•osed plat will not form
a new stre may include ROW dedication to e '- • streets).
er(explain):
Subdivision X Construction of streets and utilities to serve one or more platted lots.
Development Construction of streets and utilities to serve one or more proposed lots on
Project lands represented by pending plats.
Site projects: building use(s), approximate floor space, impervious cover ratio.
Describe Subdivisions: number of lots by general type of use, linear feet of streets and
Nature and drainage easements or ROW. orr
Size of This phase of the subdivision includes 13 lots. The development u.>
Proposed consists of approximately 867 LF of streets and 70' ROW.
Project _
Is any work planned on land that is not platted '--, -.slain:
or on land for which platting is not pending?
X No Yes
FEMA Floodplains
so
Is any part of subject property abutting a Named Regulatory Watercourse X
(Section II, Paragraph B1) or a tributary thereof? No Yes
Is any part of subject property in floodplain x 4804100375E
area of a FEMA-regulated watercourse? No Yes Rate Map
Encroachment(s)
into Floodplain Encroac - urpose(s): Building site(s) Roe. = ng(s)
areas planned? Utility crossing(s) •ther(ex. .
No X
Yes
••:- areas not shown on Rate Maps, has work been done toward amending the F
approved Floo. •: • define allowable encroachments in proposed are- . . ain.
orro
r
STORMWATER DESIGN GUIDELINES Page 6 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
p
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 3 — Property Characteristics Continued (Page 3.2)
Hydrologic Attributes of Subject Property (or Phase)
Has an earlier hydrologic analysis been done for larger area including subject property?
Yes Reference the study (&date) here, and attach copy if not already in City files.
x Duck Haven Subdivision; October, 2006
Is the stormwater management plan for the property in substantial conformance with the
earlier study? Yes X No If not, explain how it differs.
No If subject property is not part of multi-phase project, describe stormwater management
plan for the property in Part 4.
If property is part of multi-phase project, provide overview of stormwater management plan
for Project Area here. In Part 4 describe how plan for subject property will comply
therewith.
Stormwater Detention has been provided for this phase with a
detention pond developed with a previous phase. Improvements will be made
to the existing detention pond upon development of this phase.
Do existing topographic features on subject property store or detain runoff? X No Yes
Describe them (include approximate size, volume, outfall, model, etc).
Any known drainage or flooding problems in areas near subject property? X No Yes
Identify:
Based on location of study property in a watershed, is Type 1 Detention (flood control) needed?
(see Table B-1 in Appendix B)
Detention is required. Need must be evaluated. Detention not required.
What decision has been reached? By whom?
Detention study during Phase 3.
If the need for How was determination made?
Type 1 Detention
must be evaluated: Detention was required and is provided for the entire
Duck Haven Subdivision.
STORMWATER DESIGN GUIDELINES Page 7 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 3 — Property Characteristics Continued (Page 3.3)
Hydrologic Attributes of Subject Property (or Phase) (continued)
Does subject property straddle a Watershed or Basin divide? No x Yes If yes,
describe splits below. In Part 4 describe design concept for handling this.
Watershed or Basin Larger acreage Lesser acreage
Franks Creek Watershed
3.99
Boggy Creek Watershed 15.22
Above-Project Areas(Section II, Paragraph B3-a)
Does Project Area (project or phase) receive runoff from upland areas? No X Yes
Size(s) of area(s) in acres: 1) 3.44 2) 3) 4)
Flow Characteristics (each instance) (overland sheet, shallow concentrated, recognizable
concentrated section(s), small creek (non-regulatory), regulatory Watercourse or tributary); r.
Overland flow to proposed ditch lines on Phase 8 streets.
Flow determination: Outline hydrologic methods and assumptions:
Rational Method used for flow determination.
r
t
Does storm runoff drain from public easements or ROW onto or across subject property?
x No Yes If yes, describe facilities in easement or ROW:
Are changes in runoff characteristics subject to change in future? Explain
No. Existing facilities have been built and plat has been filed.
Conveyance Pathways (Section II, Paragraph C2)
Must runoff from study property drain across lower properties before reaching a Regulatory
Watercourse or tributary? X No Yes
Describe length and characteristics of each conveyance pathway(s). Include ownership of
property(ies).
STORMWATER DESIGN GUIDELINES Page 8 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
p
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 3 — Property Characteristics Continued (Page 3.4)
Hydrologic Attributes of Subject Property (or Phase) (continued)
Conveyance Pathways (continued)
Do drainage If yes, for what part of length? % Created by? X plat, or
easements instrument. If instrument(s), describe their provisions.
exist for any
part of
pathway(s)?
No
Yes
Where runoff must cross lower properties, describe characteristics of abutting lower
property(ies). (Existing watercourses? Easement or Consent aquired?)
Pathway
Areas
Describe any built or improved drainage facilities existing near the property (culverts,
bridges, lined channels, buried conduit, swales, detention ponds, etc).
Nearby
Drainage Do any of these have hydrologic or hydraulic influence on proposed stormwater
Facilities design? X No Yes If yes, explain:
STORMWATER DESIGN GUIDELINES Page 9 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Start (Page 4.1)
Stormwater Management Concept
Discharge(s) From Upland Area(s)
If runoff is to be received from upland areas, what design drainage features will be used to
accommodate it and insure it is not blocked by future development? Describe for each area,
flow section, or discharge point.
Discharge(s) To Lower Property(ies) (Section II, Paragraph El)
Does project include drainage features (existing or future) proposed to become public via
platting? x No Yes Separate Instrument? x No Yes
Per Guidelines reference above, how will
runoff be discharged to neighboringEstablishing Easements (Scenario 1)
ro Pre-development Release (Scenario 2)
p pert ies y( )' Combination of the two Scenarios
Scenario 1: If easements are proposed, describe where needed, and provide status of actions
on each. (Attached Exhibit# )
Scenario 2: Provide general description of how release(s)will be managed to pre-development
conditions (detention, sheet flow, partially concentrated, etc.). (Attached Exhibit#
Improvements to detention pond built with previous phases.
p
Combination: If combination is proposed, explain how discharge will differ from pre-
development conditions at the property line for each area (or point) of release.
e
If Scenario 2, or Combination are to be used, has proposed design been coordinated with
owner(s) of receiving property(ies)? _ No Yes Explain and provide
documentation.
p
oft
STORMWATER DESIGN GUIDELINES Page 10 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
p
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.2)
Stormwater Management Concept(continued)
Within Prosect Area Of Multi-Phase Project
•-- ' gaining Basins or Watersheds and acres shifting:
Will project result
in shifting runoff
between Basins or
between What design and mitigation is us-i • pensate for increased runoff
Watersheds? from gaining basin or watersh-• .
X No
Yes
How will runoff from Project 1. With facility(ies) involving other development projects.
Area be mitigated to pre-
2. Establishing features to serve overall Project Area.
development conditions?
Select any or all of 1, 2, 3. X On phase (or site) project basis within Project Area.
and/or 3, and explain below.
•-red facility (type& location of facility; design drainage area served; relationship to siz-
Project • -: : (Attached Exhibit#
2. For Overall Project Area (type & loc. of facili i- • Attached Exhibit#
3. By phase (or site) project: Describe planned mitigation measures for phases (or sites) in
subsequent questions of this Part.
• - aquatic echosystems proposed? No Yes In which phase(s) or
projec - ?
�.
a) u,
a >- Are other Best Manage -nt Practices for reducing stormwate ••Ilutants proposed?
a No Yes Su -rize type of BMP and = ent of use:
O O
Z
If design of any runoff-handlin• -cilities deviate from p : isions of B-CS Technical
n X Specifications, check ty•- acility(ies) and explain in later qu- ions.
Detention - - ents Conduit elements Cha •-I features
Sw- Ditches Inlets Valley gutters •• ails
Culvert features Bridges Other
STORMWATER DESIGN GUIDELINES Page 11 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D — TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.3)
Stormwater Management Concept (continued)
Within Project Area Of Multi-Phase Project(continued)
Will Project Area include bridge(s) or culvert(s)? No X Yes Identify type and
general size and In which phase(s).
Proposed 24" RCP culvert on Wigeon Trail
Proposed 24" RCP culvert in Detention Pond
If detention/retention serves (will serve) overall Project Area, describe how it relates to subject
phase or site project(physical location, conveyance pathway(s), construction sequence):
Improvements to existing detention pond in Phase 5 Public Drainage Easement
will serve this phase.
Within Or Serving Subject Property (Phase, or Site)
If property part of larger Project Area, is design in substantial conformance with earlier analysis
and report for larger area? _ x Yes No, then summarize the difference(s):
Identify whether each of the types of drainage features listed below are included, extent of use,
and general characteristics.
Typical shape? Surfaces?
c..• V-Shape Grass
u) a Steepest side slopes: Usual front slopes: Usual back slopes:
4:1 4:1 4:1 !u
a)
0 x Flow line slopes: least .00 o Typical distance from travelway: 11'
(Attached Exhibit#
Q) )
o typical Varies greatest 1.47%
Z
co
2 Are longitudinal culvert ends in compliance with B-CS Standard Specifications?
x Yes _ No, then explain:
rsections or otherwise, do valley gutters cross arterial or collector stre- - .
�, > _Yes If yes explain:
0
w a`) Are valley gutters proposed to cross . -- away from an intersection?
a,z No Yes Explain -. •er of loca 1.-
c
2 m
STORMWATER DESIGN GUIDELINES Page 12 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4 — Drainage Concept and Design Parameters Continued (Page 4.4)
Stormwater Management Concept(continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
tter line slopes: Least Usual Greatest
Are I ets recessed on arterial and collector streets? Yes No "no",
identify here and why.
Will inlets captu _ 10-year design stormflow to prevent flooding of• tersections (arterial
with arterial or cone, or)? Yes No If no, expl_• where and why not.
C-.
Will inlet size and placemen •revent exceeding allowae e water spread for 10-year
design storm throughout site (o .hase)? Y-= No If no, explain.
CD
-e —,
C
Sag curves: Are inlets placed at low poin . Yes No Are inlets and
conduit sized to prevent 100-year storm • rom ponding at greater than 24 inches?
o Yes No Explain "no" answe
a)
m
Will 100-yr stormflow b- ontained in combination of ROW a • buried conduit on
whole length of all str-ets? Yes No If no, des 'be where and why.
Do desig for curb, gutter, and inlets comply with B-CS Technical Specific- 'ons?
es No If not, describe difference(s) and attach justification.
• - any 12-inch laterals used? No Yes Identify length(s) and wher-
used.
aN Pipe runs between tem Typical Longest
} access points (feet):
Are junction boxes used at each .- d? Yes No If not, explain where
03 and why.
•� o
D
E x
17) Are downstream soff = at or below upstream soffits? Leas ount that hydraulic
Yes N. If not, explain where and why: grade line - •elow gutter line
(system-wide):
STORMWATER DESIGN GUIDELINES Page 13 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.5)
Stormwater Management Concept(continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
Describe watercourse(s), or system(s) receiving system discharge(s) below
m (include design discharge velocity, and angle between converging flow line .
U
1) atercourse (or system), velocity, and angle?
17)c
-moo
ami E 2) Watercourse system), velocity, and angle?
z
• o
c o
o 4-
0 c
E a)
E 3)Watercourse (or system), veloci _-d angle?
cn a)
c 0
0
E For each outfall abov , what measures are taken to : event erosion or scour of
8a) receiving and all ilities at juncture?
0 1)
eL 2)
a)
3)
Are swale(s) situated along property lines between properties? x No Yes
Number of instances: For each instance answer the following questions.
Surface treatments (including low-flow flumes if any):
a)
Flow line slopes (minimum and maximum):
O
• O
Z Outfall characteristics for each (velocity, convergent angle, & end treatment).
x
ns
Q Will 100-year design storm runoff be contained within easement(s) or platted drainage 16.
ROW in all instances? Yes No If"no" explain:
oft
fro
w
STORMWATER DESIGN GUIDELINES Page 14 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009 �.
or
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4 — Drainage Concept and Design Parameters Continued (Page 4.6)
•
Stormwater Management Concept(continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
Are roadside ditches used? No X Yes If so, provide the following:
a Is 25-year flow contained with 6 inches of freeboard throughout? X Yes No
Are top of banks separated from road shoulders 2 feet or more? X Yes No
Are all ditch sections trapezoidal and at least 1.5 feet deep? Yes X No
For any"no" answers provide location(s) and explain:
All Ditches are V-shaped and at least 2 ' deep
0
conduit is beneath a swale, provide the following information (each instance).
Ins -nce 1 Describe general location, approximate length:
> Is 100-ye- design flow contained in conduit/swale combination? Ye No
N If "no" expla. :
a)
O o Space for 100-ye:r storm flow? ROW Easement W'•th
z .c Swale Surface type, minimum Conduit Type and size, minim and maximum
X m and maximum slopes: slopes, design storm:
0
( Inlets Describe how condui 's loaded (from streets/stor ' drains, inlets by type):
c T
cca
L
`+-
0 o Access Describe how maintenance - cess is p •vided (to swale, into conduit):
E
a>• 0
= c
.S Instance 2 Describe general location, :ppro ate length:
a)
E
w
o 7 Is 100-year design flow containe. in conduit/swale c. bination? Yes No
o If "no" explain:
mc a.
E ai Space for 100-year storm ow? ROW Easement Width
• c
Swale Surface type, .nimum Conduit Type and size, mi urn and maximum
ms and maximum slope • slopes, design storm:
L-
C (0
o m Inlets Describe ow conduit is loaded (from streets/storm drains, inl- by type):
a)
c
� o
Access Describe how maintenance access is provided (to swale, into condu :
STORMWATER DESIGN GUIDELINES Page 15 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
AIPPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.7)
Stormwater Management Concept(continued) •
Within Or Serving Subject Property(Phase, or Site) (continued)
"yes" provide the following information for each instance:
Inst. ce 1 Describe general location, approximate length, surfacing:
as_C
Q
O W
cf; Is 100-year design .w contained in swale? Yes No Is swale wholly
o >- within drainage ROW. Yes No Explain "no" . swers:
a)
0 Access Describe how mainter nce access is provide*
L o
z
c x A'
Instance 2 Describe general location, ap► .ximate length, surfacing:
a)
-
m •
o E
.§ Is 100-year design flow co fined in swale? Yes No Is swale wholly
a o within drainage ROW? Yes No Explain "no' -nswers:
N O
2 Access Descr how maintenance access is provided:
Q
Ins nce 3,4, etc. If swales are used in more than two instances, attach sheet
oviding all above information for each instance.
w" channels: Will any area(s) of concentrated flow be channelized (deepened
wide or straightened) or otherwise altered? No Yes If only s . tly
shaped, s "Swales" in this Part. If creating side banks, provide informati.• .elow.
.� Will design repli a natural channel? Yes No If"no" •r each instance
Q describe section sha & area, flow line slope (min. & max.), s •-ces, and 100-year
w design flow, and amount reeboard: op
' Instance 1:
m
c y.
E
a) fro
> Instance 2:
L
Q
E o
ru
op
x Instance 3:
U
FP
STORMWATER DESIGN GUIDELINES Page 16 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4 — Drainage Concept and Design Parameters Continued (Page 4.8)
Stormwater Management Concept(continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
\Existing channels (small creeks): Are these used? No Yes
I "yes" provide the information below.
Wi small creeks and their floodplains remain undisturbed? Yes No How
man disturbance instances? Identify each planned location:
For each loc=tion, describe length and general type of proposed improv-ment
(including floo•slain changes):
For each location, des• ibe section shape & area, flow line sir•e (min. & max.),
surfaces, and 100-year •-sign flow.
a)
c Watercourses (and tributaries): ••ide from fri •e changes, are Regulatory
Watercourses proposed to be altered: Yes Explain below.
• • Submit full report describing proposed c -n;-s to Regulatory Watercourses. Address
existing and proposed section size and sh•4•e, surfaces, alignment, flow line changes,
> length affected, and capacity, and provide f documentation of analysis procedures
• and data. Is full report submitted? Y.s No If"no" explain:
E
a)
• All Proposed Channel Work: or all proposed chan el work, provide information
v requested in next three boxe .
If design is to replicate nat al channel, identify location an• length here, and describe
design in Special Design section of this Part of Report.
Will 100-year flo be contained with one foot of freeboard? Y:. No If
not, identify loc.. ion and explain:
Are RO" /easements sized to contain channel and required maintenance spate?
es No If not, identify location(s) and explain:
STORMWATER DESIGN GUIDELINES Page 17 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.9)
Stormwater Management Concept (continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
How many facilities for subject property project? 1 For each provide info. below.
For each dry-type facility: Facility 1 Facility 2
Acres served & design volume+ 10% 1 1
100-yr volume: free flow& plugged 1 1
Design discharge (10 yr&25 yr) 1 1
Spillway crest at 100-yr WSE? X yes no yes no
Berms 6 inches above plugged WSE? X yes no yes no
Explain any"no" answers:
a)
}
For each facility what is 25-yr design Q, and design of outlet structure?
Facility 1: 2-24° RCP 62.62 cfs
0
z Facility 2:
IYk
X Do outlets and spillways discharge into a public facility in easement or ROW?
Facility 1: X Yes No Facility 2: Yes No
-ami If"no" explain:
CI
0
L
- For each, what is velocity of 25--yr design discharge at outlet? & at spillway?
Facility 1: 6.1 fps_& 2.1. fps Facility 2: &
Are energy dissipation measures used? No X Yes Describe type and
LL- location:
o Energy dissipator blocks have been added to the discharge
' headwall.
CD
a)
a
For each, is spillway surface treatment other than concrete? Yes or no, and describe:
Facility 1: Grass
Facility 2:
For each, what measures are taken to prevent erosion or scour at receiving facility?
Facility 1: Rock Rip-Rap
Facility 2:
If berms are used give heights, slopes and surface treatments of sides.
Facility 1: 6' tall 4:1 Slope Grass Seeded
Facility 2: FP
STORMWATER DESIGN GUIDELINES Page 18 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.10)
Stormwater Management Concept(continued)
Within Or Serving Subject Property (Phase, or Site) (continued)
Do structures comply with B-CS Specifications? Yes or no, and explain if"no":
U)
Facility 1; Yes
m
TU
5 Facility 2:
o• c
o
C U
N --
7L)
—
o For additional facilities provide all same information on a separate sheet.
Are parking areas to be used for detention? X No Yes What is
maximum depth due to required design storm?
Roadside Ditches: Will culverts serve access driveways at roadside ditches?
No X Yes If"yes", provide information in next two boxes.
Will 25-yr. flow pass without flowing over driveway in all cases? X Yes No
Without causing flowing or standing water on public roadway? X Yes No
Designs & materials comply with B-CS Technical Specifications? X Yes No
Explain any"no" answers:
C-.
CD
oAre culverts parallel to public roadway alignment? X Yes No Explain:
• N
N }
•
X
Q Creeks at Private Drives: Do private driveways, drives, or streets cross drainage
ways that serve Above-Project areas or are in public easements/ROW?
0
• z X No Yes If"yes" provide information below.
How many instances? Describe location and provide information below.
All lots will need ditch crossing culverts to
• Location 1: access Wigeon Trail. Each proposed lot will need
U a minimum of an 18" culvert.
Location 2:
Location 3:
For each location enter value for: 1 2 3
Design year passing without toping travelway?
Water depth on travelway at 25-year flow?
Water depth on travelway at 100-year flow?
For more instances describe location and same information on separate sheet.
STORMWATER DESIGN GUIDELINES Page 19 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4 — Drainage Concept and Design Parameters Continued (Page 4.11)
Stormwater Management Concept(continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
Named Regulatory Watercourses (&Tributaries): Are culverts proposed on these
facilities? X No Yes, then provide full report documenting assumptions,
criteria, analysis, computer programs, and study findings that support proposed
design(s). Is report provided? Yes No If"no", explain:
Arterial or Malor Collector Streets: Will culverts serve these types of roadways?
X No Yes How many instances? For each identify the
location and provide the information below.
a Instance 1:
>- Q
Instance 2:
x c
o Instance 3:
0
o .o Yes or No for the 100-year design flow: 1 2 3
o Headwater WSE 1 foot below lowest curb top?
O Spread of headwater within ROW or easement?
E '
Is velocity limited per conditions (Table C-11)?
•N m Explain any"no" answer(s):
P
O C
U O
> ct
03 pO
Ts a)
o :e Minor Collector or Local Streets: Will culverts serve these types of streets?
aNo X Yes How many instances? 1 for each identify the
o location and provide the information below:
a)
Instance 1: Culvert #1 on Wigeon Trail Drive
• c Instance 2:
a3
Ci Instance 3:
EFor each instance enter value, or"yes"I"no"for: 1 2 3
cDesign yr. headwater WSE 1 ft. below curb top? Yes
< .22 100-yr. max. depth at street crown 2 feet or less? Yes
E Product of velocity (fs) &depth at crown (ft) - ? 0
to
Is velocity limited per conditions (Table C-11)? Yes
Limit of down stream analysis (feet)? 50'
Explain any"no" answers:
PP
STORMWATER DESIGN GUIDELINES Page 20 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.12)
Stormwater Management Concept(continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
All Proposed Culverts: For all proposed culvert facilities (except driveway/roadside
ditch intersects) provide information requested in next eight boxes.
Do culverts and travelways intersect at 90 degrees? X Yes No If not,
identify location(s) and intersect angle(s), and justify the design(s):
Does drainage way alignment change within or near limits of culvert and surfaced
approaches thereto? X No Yes If"yes" identify location(s), describe
change(s), and justification:
Are flumes or conduit to discharge into culvert barrel(s)? X No Yes If yes,
identify location(s) and provide justification:
Are flumes or conduit to discharge into or near surfaced approaches to culvert ends?
No X Yes If"yes" identify location(s), describe outfall design treatment(s):
c Areas are protected with Rock Rip-Rap Channel Lining
0
0
0
N
> Is scour/erosion protection provided to ensure long term stability of culvert structural
v components, and surfacing at culvert ends? X Yes No If"no" Identify
locations and provide justification(s):
Will 100-yr flow and spread of backwater be fully contained in street ROW, and/or
drainage easements/ROW? X Yes No if not, why not?
Do appreciable hydraulic effects of any culvert extend downstream or upstream to
neighboring land(s) not encompassed in subject property? X No Yes If
"yes" describe location(s) and mitigation measures:
Are all culvert designs and materials in compliance with B-CS Tech. Specifications?
X Yes No If not, explain in Special Design Section of this Part.
STORMWATER DESIGN GUIDELINES Page 21 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.13)
Stormwater Management Concept (continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
bridge included in plans for subject property project? No Yes
If"ye " rovide the following information.
Name(s) a functional classification of the roadway(s)?
What drainage way(s) is to be c sed?
a)
rn
o
c 171
A full report supporting al spects of the proposed bridge(s tructural, geotechnical,
hydrologic, and hydr is factors) must accompany this summa eport. Is the report r^
provided? es No If"no" explain:
tk=
Is a Stormwater Provide a general description of planned techniques:
Pollution Prevention Silt fence and inlet filtration will serve as the
Plan (SW3P)
main protection against stormwater pollution. The
C� established for Contractor shall use any other means necessary
project construction? throughout construction.
No X Yes P
Special Designs— Non-Traditional Methods
Are any non-traditional methods (aquatic echosystems, wetland-type detention, natural stream
replication, BMPs for water quality, etc.) proposed for any aspect of subject property project?
X No Yes If"yes" list general type and location below.
.�w
•
tDfug Il report about the proposed special design(s) including rationale for use and
expected Report must substantiate that stormwater management • yes will not
be compromised, and intenance cost will not exceed thos- - .itional design00,
solution(s). Is report provided? .Yes • no" explain:
p
p
STORMWATER DESIGN GUIDELINES Page 22 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009 .
p
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4 — Drainage Concept and Design Parameters Continued (Page 4.14)
Stormwater Management Concept(continued)
Within Or Serving Subject Property (Phase, or Site) (continued)
•ecial Designs—Deviation From B-CS Technical Specifications
If an design(s) or material(s) of traditional runoff-handling facilities deviate from provisions of
B-CS :chnical Specifications, check type facility(ies) and explain by specific detail eleme .
De _ tion elements Drain system elements Channel features
Culve • eatures Swales Ditches Inlets c tfalls
Valley gu _ s Bridges (explain in bridge report)
In table below briefly i.-ntify specific element,justification for deviation(s).
Specific Detail Eleme Justification for Deviation (attach add' '•nal sheets if needed)
1)
2)
3)
4)
5)
Have elements been co• "•inated with the City Engineer or her/his desi. ee? For each item
above provide"yes" •• no", action date, and staff name:
1)
2)
3)
4)
Design Parameters
Hydrology
Is a map(s) showing all Design Drainage Areas provided? X Yes No
Briefly summarize the range of applications made of the Rational Formula:
For the Rational Formula we assumed residential areas had a
runoff coefficient of 0.5 for large residential or estate lots.
What is the size and location of largest Design Drainage Area to which the Rational Formula
has been applied? 4.37 acres Location (or identifier): Culvert #1
STORMWATER DESIGN GUIDELINES Page 23 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.15)
Design Parameters(continued)
Hydrology(continued)
In making determinations for time of concentration, was segment analysis used?
X No Yes In approximately what percent of Design Drainage Areas?
As to intensity-duration-frequency and rain depth criteria for determining runoff flows, were any
criteria other than those provided in these Guidelines used? X No Yes If"yes"
identify type of data, source(s), and where applied:
For each of the stormwater management features listed below identify the storm return
frequencies (year) analyzed (or checked), and that used as the basis for design.
F
Feature Analysis Year(s) Design Year
Stor s stem for arterial and collector streets
Storm drain system for eets
Open channels tip.
Swale/buried conduit coeu of channel
Swa
Roadside ditches and culverts serving them 2,5,10,25,50, 100 25
Dee i facilities: spillway crest and its outfall ON
Detention facilities: and conveyance structure(s)
Detention facilities: volume when ou�tet ' •ged O,
Culverts serving private drives or str
Culverts serving pu ways
Bri provide in bridge report.
Hydraulics
What is the range of design flow velocities as outlined below?
Design flow velocities; 25 year Gutters Conduit Culverts Swales Channels
Highest(feet per second) 7.95
Lowest(feet per second) 5.93
Streets and Storm Drain Systems Provide the summary information outlined below:
Roughness coefficients used: For street gutters: NA
For conduit type(s) RCP 0.013 Coefficients:
STORMWATER DESIGN GUIDELINES Page 24 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4 — Drainage Concept and Design Parameters Continued (Page 4.16)
Design Parameters (continued)
Hydraulics (continued)
eet and Storm Drain Systems (continued)
For th- ollowing, are assumptions other than allowable per Guidelines?
Inlet coeffi '-nts? No Yes Head and friction losses No Yes
Explain any"ye " answer:
In conduit is velocity general creased in the downstream dire on? Yes No
Are elevation drops provided at in : s, manholes, and juncti. boxes? Yes No
Explain any"no" answers:
Are hydraulic grade lines calculated and own for .--ign storm? Yes No
For 100-year flow conditions? es No ••lain any"no" answers:
What tailwater conditi• s were assumed at outfall point(s) of the storm • -in system? Identify
each location and - plain:
Open Channels If a HEC analysis is utilized, does it follow Sec VI.F.5.a? Yes No
Outside of straight sections, is flow regime within limits of sub-critical flow? X Yes No
If"no" list locations and explain:
Culverts If plan sheets do not provide the following for each culvert, describe it here.
For each design discharge, will operation be outlet(barrel) control or inlet control?
All culverts will be inlet controlled.
Entrance, friction and exit losses:
A 0.5 entrance and exit loss coefficients are used for sloped end treatments
and square edged headwalls with wingwalls.
Bridges Provide all in bridge report
STORMWATER DESIGN GUIDELINES Page 25 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.17)
Design Parameters (continued)
Computer Software
What computer software has been used in the analysis and assessment of stormwater
management needs and/or the development of facility designs proposed for subject property
project? List them below, being sure to identify the software name and version, the date of the
version, any applicable patches and the publisher
Microsoft Excel Spreadsheet
.11
Part 5 — Plans and Specifications
Requirements for submittal of construction drawings and specifications do not differ due to use of a
Technical Design Summary Report. See Section III, Paragraph C3.
Part 6 — Conclusions and Attestation
Conclusions
Add any concluding information here: of
The Duck Haven Subdivision, Phase 8 will have no adverse impact to downstream
e.«
properties and conforms to the overall subdivision report.
re
IWe
Attestation
Pe
Provide attestation to the accuracy and completeness of the foregoing 6 Parts of this Technical
Design Summary Drainage Report by signing and sealing below.
"This report(plan) for the drainage design of the development named in Part B was prepared
by me (or under my supervision) in accordance with provisions of the Bryan/College Station '"°
Unified Drainage Design Guidelines for the owners of the property. All licenses and permits .M
required by any and all state and federal regulatory agencies for the proposeddrainage
improvements h.ve been issued or fall under applicable general permits."
(Affix Seal) A
. t
-7/& C
• 4• 1• ,1
Litred Professional Engineer l •r "` ;"=r ""
V
/ iF H F
.E ..,...•. ..-,.,ia w
State of Texas PE No. / '1115 ktf�. � c`� •
Z�`4. Wti
okE
I
STORMWATER DESIGN GUIDELINES Page 26 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009 �.
■f
EXHIBIT B
Drainage Area Maps
Drainage Report
Duck Haven Subdivision, Phase 8
EXHIBIT C
Runoff and Culvert Calculations
Drainage Report
Duck Haven Subdivision, Phase 8
wr
x
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EXHIBIT D
Detention Calculations
Drainage Report
Duck Haven Subdivision, Phase 8
EXHIBIT"D-1"
PROPOSED DETENTION POND ROUTING
Duck Haven 8
in EVENT= 5 D.A.#
D.A.# D.A.# .Pond Routing
a 0I w
0 o m -g g �_ ° _1 a Cr) F
Q 2 _ 'a + + _ >1 a O N
�. 2 0 + <n CJI n w
in o ° o x O X
I Q 0 _1 N N I- 0- w I- w
Qp 63.411I 48.21
Tc 21.0� _ 21.0]
inc 1.0 1Time cfs cfs I cfs cfs cfs cfs ft cfs _cfs cfs
0.0 0.0; 0.01 3.021 0.00 0.00 0.00 284.75 0.00 0.0 0.00
1.011 3.01 3.01 9.05, 2.421 3.02 1 0.30 284.84 0.301 _ 2.3 2.29
2.01 _ 6.01 6.01 15.09, 8.92 11.471 1.281 285.03 1.28 4.6 4.59
3.0 9.1' 9.11 21.121 17.981 24.011 3.011 285.161 3.01 6.9 6.88
4.01 12.1 12.11 27.161 28.901 39.11 5.10 285.311 5.10 9.2 9.17
5.01 15.1 1 15.11 33.201, 41.151 56.06 7.45 285.47 7.451 1 11.5 11.46
' 18.1 18.11 39.23 54.37 74.351 9.991 285.65 9.991 13.8 13.76
7.0 21.1 21.1' 45.27 68.29 93.601 12.661 285.84 12.661 _ 16.0 16.05
8.01 24.11 24.1 51.301 82.621 113.561 15.47 286.04 15.47 18.3 18.34
9.01 27.21 27.21 57.341 96.871 133.921 18.53 286.24 18.53 20.6 20.63
10.01 30.2' 30.21 63.37 111.061 154.211 21.57 286.44 1 21.571 1 22.9 22.93
11.0, 33.21 33.2' 69.41 125.211 174.431 24.611 286.63 24.611 25.2 25.22
12.01 36.21 36.2 75.45 _ 139.331 194.621 27.641 286.831 27.64 27.5 27.51
13.0 39.21 39.2 81.48 153.891 214.781 30.451 287.021 30.45', 29.8 29.80
14.0 42.2 42.21 87.52 171.54 235.371 31.921 287.161 31.921 _ 32.1 32.10
15.01 45.31 45.31 93.55 191.831 259.051 33.611 287.321 1 33.611 1 34.4 34.39
16.01 48.311 48.3' 99.59 214.40', 285.38, 35.491, 287.50 I 35.49 36.7 36.68
17.01 51.3 51.3, 105.62, 240.911 313.991, 36.54' 287.61 36.54 39.0 38.97
18.01 54.3 54.31 111.66 271.12 346.541 37.71 287.74', '' 37.71 41.31 41.27
19.01 57.3' 57.31 117.70 304.75 382.781 39.011 287.88' 39.01 43.61 43.56
20.01 60.4 60.4 123.731 341.77 422.44' 40.34; 288.031 40.341 45.91 45.85
21.01 63.4 63.4 125.331 382.71 465.50 41.39 288.16' 1 41.391, 48.11 48.14
22.0' 62.0 62.01 122.40', 423.171 508.04 42.44 288.28 42.44 47.11 47.06
23.0 60.4 60.41 119.381 458.86, 545.57' 43.36 288.39 43.36 45.9 45.92
24.0 58.9 58.9 116.371 489.93 578.241 44.16' 288.49 44.16, 44.81 44.77
25.0 57.41 57.4! 113.35' 515.89 606.301 45.21 1 288.56' 45.21 1 43.61 43.63
26.01 55.91 55.9 110.33 537.04! 629.23 46.10 288.62'; 46.10 1 42.51 42.48
27.01 54.4' 54.4 107.31 553.751 647.37 46.81 288.671 , 46.81 1 41.3, 41.33
28.01 52.91 52.9, 104.291 566.381 661.06 47.34 288.70' 47.34' 1 40.21 40.19
29.01 51.41 51.4 101.28, 575.25 670.68 47.71 288.73 47.711 39.01 39.04
30.01_ 49.91 49.9! 98.26 580.641 676.52; 47.94 288.74 47.941 37.91 37.89
31.0 48.4' 48.4 95.24 582.831 678.90' 48.041 288.75 1 48.041 36.71 36.75
32.0 46.9!1 46.9 92.22 582.061 678.071 48.00' 288.741 48.001 35.61 35.60
33.01 45.41 45.41 89.20, 578.57' 674.28' 47.861, 288.731 47.86'1 1 34.51 34.46
34.01 43.8 43.81 86.191 572.57 667.78 47.60', 288.72!, 47.601 1 33.31 33.31
35.0 42.3 42.3' 83.17', 564.261 658.761 47.251 288.701 47.251 1 32.2 32.16
36.0 40.8 40.8 80.15 553.811 647.431 46.811 288.67' 46.81 31.0 31.02
37.0, 39.3, 39.3 77.13 541.401 633.961 46.281 288.631 46.28 29.9 29.87
38.0 37.81 37.81 74.12, 527.171 618.53' 45.681 288.591 45.681 ' 28.711 28.72
39.0' 36.31 36.31 71.10', 511.26 6- 01.281 45.01', 288.551 45.011 27.6 27.58
40.0 34.81 34.81 68.081 493.811 582.36 44.271 288.50' 44.27 26.41 26.43
41.0 33.31 33.3 65.061 474.38' 561.891 43.761 288.441 43.76 25.31 25.29
42.0: 31.8 31.8 62.04', 453.041 539.45, 43.201 288.381 1 43.20 1 24.11 24.14
43.01 30.3 30.3 59.03 429.87' 5- 15.08142.61'' 288.301 42.611 i 23.01 22.99
44.01 28.8 28.81 56.011 404.96 488.891 41.971 288.23 41.971 i 21.8 21.85
45.0' 27.2 27.21 52.991 378.40 460.971 41.281 288.14' 41.281 i 20.7 20.70
46.0 25.7 25.7'', 49.971 350.281 4- 31.40 40.561 288.05' , 40.5611 19.6 19.55
47.0 24.2 24.21 46.961 320.97 400.25 39.641 287.951 39.641 18.4 18.41
48.0 22.7 22.711 43.94 290.96 367.92' 38.481 287.821 38.481 17.3 17.26
49.0' 21.2 21.21 40.921 260.32 334.901 37.29' 287.691 i 37.291 16.1 16.12
50.01 19.7 19.71 37.90 229.08' 3- 01.24 1 36.08 287.56: 1 36.081 15.0 14.97
51.01 18.2 18.2; 34.88 198.631 266.981 34.18 287.37 34.181 13.8 13.82
52.01 16.7 16.7' 31.87 169.951 233.511 31.78, 287.15 , 31.78 1 12.7 12.68
53.01 15.2 15.2 28.851 144.361 201.811 28.72' 286.90 28.72 11.5 11.53
54.0' 13.71 13.7, 25.83', 124.36, 173.211 24.43, 286.62 24.43, 10.4 10.38
55.0 12.21 12.21 22.81 108.251 150.191 20.971 286.40 20.971 9.21 9.24
56.01 10.71 10.7' 19.79', 94.86 131.061 18.101 286.211 18.101 8.11 8.09
57.0 9.1 9.1 16.78183.39', 114.66'' 15.63' 286.05' 15.63'' 6.91 6.95
58.0', 7.6 7.61 13.761 73.04' 100.17 13.56 285.91 j 13.56 5.81 5.80
59.01 6.1 6.11 10.741 63.37 86.80 11.71! 285.781 11.71 4.71 4.65
60.01 4.6 4.6' 7.721 54.20' _ 74.11 9.95' 285.651 9.95 3.51 3.51
- 61.0' 3.1 L 3.1 4.711 45.39' 61.93 8.27 285.53 8.27 _ 2.41 2.36
62.01 1.6! 1.6 1.69r 36.84 50.10 6.63: 285.42 6.63 1.21 1.21
_ 63.0, 0.1 0.1 0.09' 28.48 38.53 5.031 285.30 5.03 0.11 0.07
64.01 0.01' 0.0 0.00 21.28 28.571 3.651 285.201 3.65 0.01 0.00
PEAK FLOWS - j I 1
1
63.37 63.37 48.04 1 288.751 1 48.04 48.14 ! 48.14
dra.xls
0.00 indicates inital condition Exhibit D-1
EXHIBIT"D-1"
PROPOSED DETENTION POND ROUTING
Duck Haven 8
D.A.# D.A.# i Pond Routing _ ',EVENT= ! 10 ; D.A.#
n-a Q, 1
I Q
c I -a I W 1 1 c' to C7
`aI N 1 Z gI a1 g _1 OCf) m 1 Z
O O + -p' + c > H O' rn F H
T ° O + u) un _ O d orX 3i ox
x a I c.) C N N 0 a E l f- al W F- w
Qp 71.91 . . _ 54.61,
Tc 21.0 1 21.01
inc 1.01
Tim acfs I cfs cfs cfs 1 cfs 1 cfs ft 1 cfs cfs 1 cfs
0.011 0.0 0.01 3.421 0.00' 0.001 0.00 i 284.751 0.001 0.01 0.00
1.0 3.4, 3.4 1, 10.27' 2.73 3.421 0.351 284.861 0.351 2.6 2.60
2.0 6.81 6.81 17.11 9.991 13.001 1.51 285.05 1.51 5.21 5.20
3.01 10.3 10.31 23.961 20.14 27.101 3.48 285.191 3.481 7.81 7.80
4.01 13.7 13.7 30.80! 32.38 44.101 5.8611 285.361 5.86 10.41 10.40
5.0 17.11 17.1 37.64 46.13 63.181 8.53 285.54 8.53 13.0' 13.00
6.0 20.51 20.5; 44.491 60.96' 83.771 11.411 285.75 11.411 1 15.61 15.60
7.0 24.01 24.01 51.331 76.56 105.451 14.441 285.96 14.441 18.21 18.20
8.0 27.4 27.4 58.18 92.00 127.90 17.951 286.18 17.951 20.811 20.80
9.01 30.8 30.8; 65.02 107.171 150.181 21.511 286.39', 21.511 23.4 23.40
10.0 34.2; 34.2 71.87 122.151 172.19', 25.021 286.60 25.021 26.0 26.00
11.01 37.61 37.6, 78.71 137.00 194.02 28.51, 286.81, 28.51' 1 28.61 28.60
12.01 41.111 41.1 85.56 152.19', 215.72 31.76', 287.021 31.76 31.2' 31.20
13.0 44.51 44.5 92.40 170.8811 237.74 33.4311 287.17 33.431 33.8 33.80
14.0 47.9 47.9 99.2511 192.5611 263.281 35.36 287.341 35.361 1 36.4 36.40
15.0 51.3, 51.31 106.09 217.091 291.80 37.36 287.521 37.36 39.0 39.00
16.0 54.81 54.81 112.93 246.071 323.18, 38.55 287.641 38.55 41.6 41.60
17.0 58.2 58.21 119.781 279.17, 359.01 39.921 287.781 39.92 44.2 44.20
18.01 61.6, 61.61 126.62', 316.0711 398.951 41.44 287.941 41.44, , 46.8 46.80
19.0 65.0 65.01 133.47 357.14, 442.691 42.77 288.081 42.77! 1 49.4 49.40
20.0', 68.4 1, 68.4 140.31 402.58 490.611 44.021 288.22 44.02 52.01 52.00
21.0 71.91_ 71.9 142.13! 452.15 542.89 45.371 288.38, 45.37 1 54.6, 54.60
22.0 70.31 70.31 138.80 500.70; 594.271 46.791 288.53; 46.791 1 53.4', 53.37
23.01 68.5 68.51 135.38 542.89 639.501 48.311 288.64 48.311 52.1 52.07
24.0 66.8 r 66.81 131.96 579.05 678.27' 49.611 288.74 49.61 50.81 50.77
25.0 65.1 65.11 128.54 609.59 711.01 50.711 288.82, 50.711 49.5 49.47
26.0 63.4 63.4 125.12 634.891 738.13', 51.621 288.891 51.621 ,
48.2 48.17
27.01, 61.71 61.7 121.69 655.29776-1-0.00' 52.361 288.951 52.361 1 46.91 46.87
28.0' _ 60.01 60.0 118.27, 671.131 776.99', 52.93 288.991 52.931, 45.61 45.57
29.0 58.3 58.31 114.85 682.651 789.40 53.38 289.021 53.381 44.3 44.27
30.011 56.6 56.61 111.43 690.151 797.50 53.68, 289.0411 53.681 43.0 42.97
31.01 54.9 54.91 108.001 693.911 801.571 53.831, 289.041 53.831 41.7 41.67
32.01 53.1 53.11 104.58 694.231 801.92'1 53.841 289.05 53.84' 40.4' 40.37
33.011 51.4 51.4' 101.16 691.361 798.811 53.73' 289.041 53.73 39.1 39.07
35.011 48.0 48.0 94.32, 676.9871 783.271 53.49' 37.8 37.77
792.521 289.031 53.49
53.15' 289.00! 53.15 36.5 36.47
36.0 46.3 46.3' 90.891 665.82 771.301 52.741 288.98', 52.74; 35.2 35.17
37.0 1, 44.6, 44.61 87.47 652.23 756.721 52.251 288.941, 52.25 33.9 33.87
38.0 42.91 42.9' 84.05 636.35 739.70' 51.67 288.901 51.67 32.6 32.57
39.0, 41.21 41.2 80.631 618.351 720.40 51.02', 288.851 51.02 31.3, 31.27
40.0. 39.5 39.5' 77.201 598.36' 698.971 50.3111 288.79. 50.31 30.01 29.97
41.01 37.71 37.7 73.78 576.53 675.571 49.521 288.73', 49.52, 28.71 28.67
42.01 36.01 36.0 70.36 552.97 650.311 48.671 288.67 48.671 27.4 27.37
43.01 34.31 34.3 66.94 527.81 623.33 47.76 288.601 I 47.761 26.1 26.07
44.01 32.61 32.6 63.51 501.141 594.74 46.801 288.53 1 46.801 24.8 24.77
45.0 30.9 30.9 60.09, 472.78 564.65 45.941 288.441 45.94 23.5 i 23.48
46.0 29.2 29.2 56.67' 442.65' 532.871 45.11 288.3511_ 45.11 1 22.2! 22.18
47.0 27.5 27.5 53.25 410.83! 499.3211 44.241 288.25 44.241 20.91 20.88
48.0 25.8 25.8 49.83 377.43 464.081 43.331 288.15 1 43.33 19.6'1 19.58
49.0E 24.1 24.1 46.40 342.501, 427.25 42.3711 288.04 1 42.371 18.311 18.28
50.0 22.3 22.31 42.98, 306.7911 388.91 41.061 287.90! 1 41.061 17.0 16.98
51.01 20.6 20.61 39.561 270.641 349.771 39.571 287.741 1 39.57; 15.7 15.68
52.01 18.9 18.9 36.141 234.08 310.20 I 38.06 287.59� 38.06 I 14.414.38
53.01 17.2 17.2 32.7111 198.44 270.221 35.89 287.381 35.891 L 13.1 13.08
54.0', 15.5 15.5 29.291 165.291 231.161 32.93 287.12 32.93', 11.811 11.78
55.0 13.8 13.81 25.87' 137.391 194.58' 28.60 286.82 28.601 10.51 10.48
56.0 12.1 12.1 22.45 116.071 163.26 23.59 286.52 1 23.591 9.21 9.18
57.0 10.4 10.4 19.031 99.23 138.52 19.64 286.281 I 19.64 7.9 _ 7.88
58.0, 8.7 8.7 15.601 85.44 118.261 16.41 286.081 16.41 J 6.6 6.58
59.01 6.9, 6.91 _ 12.181 73.39 101.05; 13.83 285.921 13.83' 5.3 5.28
60.01 5.21 5.21 8.761 62.251 85.58! 11.66 285.761 11.661 4.01 3.98
61.0 3.5 3.5; 5.341, 51.77' 71.01 9.621 285.621 9.621, 2.71 2.68
62.0 1.8 1.81 1.91 41.751'1 57.10, 7.681 285.48 7.68 1.41 1.38
63.0 0.1 0.1 0.10', 32.071 43.661 5.80'1 285.35 5.80 0.11 0.08
64.0' 0.0 0.01 0.00, 23.801 32.171 4.19,, 285.241 4.19 0.01 0.00
1 1
PEAK FLOWS71.87 71.87 1 1 I 53.84 7 289.05 53.84 54.60 54.60
dra.xls
0.00 indicates inital condition Exhibit D-1
EXHIBIT"D-1"
PROPOSED DETENTION POND ROUTING
Duck Haven 8
D.A.# D.A.# I Pond Routing I EVENT= I 25 D.A.#
3k c
LI O a 0
Q I
e. + p cn
wW Z 3
01 ZN Fo CJ
a R-
aO C + C ci
> H O i cn
'6•I O + '
cn I y' c o d O � N O X
x I c. 1 c.) �i N;
O Cl. w F a w r w
Qp I 82.51 I 62.7
Tc 1 21.0' I 11 21.0
inc { 1.0; I 1
Time1cfs cfs cfs cfs cfs I cfs ft cfs 1 cfs 1 cfs
O.O1 0.01 0.0 3.931 0.001 0.00 0.001 284.75 0.00, 0.01 0.00
1.0' 3.9 3.9 11.781 3.11 3.93 I_ 0.411 284.87 0.41' 3.0 2.98
2.0 7.91 7.9 19.63' 11.30 14.89 1.79'1 285.07 1.79 F 6.0 5.96
3.0 11.81 11.8 27.481 22.82 30.93 4.051 285.22 4.05 8.9, 8.95
4.01 15.7 15.7 35.331 36.741 50.30 6.781 285.42 6.78 11.91 11.93
5.0 19.6, 19.6 43.18 52.381 72.07 9.841 285.63 9.84 14.91 14.91
6.0! 23.61 23.61 51.031 69.26 95.56 13.151 285.861 13.151 17.9 17.89
7.01 27.51 27.51 8 1 86.26 120.28 17.011 286.10 17.01 20.91 20.87
8.0 31.4 31.4 66.73' 102.331 145.13 21.40 286.34 21.40 23.9 23.85
9.0 35.311 35.31 74.58 117.811 169.061 25.62 286.56 25.62 26.8 26.84
10.0; 39.31 39.3' 82.43 132.901 192.381 29.741 286.78 29.74 29.8 29.82
11.01 43.21 43.2 90.28 147.741 215.32 33.79, 287.00 1 33.79 32.8 32.80
12.0' 47.11 47.11 98.13 166.63 238.011 35.691 287.15 1 35.69 35.81 35.78
13.0 51.01 51.01 105.98 188.941 264.761 37.911 287.33 37.91 38.81 38.76
14.01 55.01 55.0' 113.83 214.491 294.92 40.22' 287.52, 40.22 41.7' 41.74
15.0 58.91 58.9 121.68 245.09 328.32 41.61 287.65 I 41.611 44.7 44.73
16.01 62.8 62.8 129.53 280.33 366.77 _ 43.221 287.80: 43.22' 47.7 _ 47.71
17.01 66.7' 66.71 137.38' 319.82 409.861 45.02 287.97 45.02 50.7 50.69
18.01 70.71 70.711 145.231 364.241 457.201 46.481
288.111 1 46.481 53.7 53.67
19.01 74.61 74.61 153.08! 413.55 509.47 47.961 288.277 47.961 56.7' 56.65
20.01 78.5 78.51 160.93 467.451 566.621 49.59' 288.44 49.591 59.6 59.63
21.01 82.4 82.41 163.01: 525.121 628.38 51.63 288.60 51.631 62.61 62.62
22.01 80.6 80.6 159.20 580.621 688.121 53.751 288.751 53.751 61.21 61.21
23.01 78.61 78.6, 155.27 628.65 739.821 55.581 288.89' 55.58 59.71 59.72
24.011 76.7' 76.7 151.35 669.63 783.921 57.15 289.00 57.15 58.21 58.23
25.0 74.7 74.7 147.42 703.811 820.971 58.58 289.08 58.58 56.71 56.74
26.01 72.7, 72.71 143.50 731.71 851.231 59.76, 289.141 1 59.76 55.3 55.25
27.0' 70.8'1 70 81 139.57 753.82 875.211 60.691 289.201 60.691 53.81 53.76
28.0 68.8, 68.81 135.65 770.60, 893.401 61.4011 289.241 61.40 1 52.31 52.27
29.0 66.81 66.8 131.72 782.461 906.25' 61.901 289.26 61.90 50.81 50.78
30.01 64.91 64.9' 127.80 789.771 914.18 62.201 289.28 62.201 49.3 49.29
31.01 62.9 62.91 123.87 792.89 917.57 62.341 289.291 1 62.341 47.8 47.80
32.01 61.0, 61.01 119.951 792.16, 916.77 62.301 289.29'' 62.301 F 46.31 46.30
33.01 59.01 59.0 116.021 787.861 912.101 62.12' 289.28'. 62.12 44.8 44.81
34.011 57.0 57.0 112.10 780.27 903.8811 61.80 289.261 ' 61.80 43.3 43.32
35.0, 55.1 55.1 108.17', 769.65 892.371 61.36 289.231 1 61.36, 41.8 41.83
36.0, 53.1 53.1 104.25 756.24' 877.821 60.79 289.201 1 60.791 40.3 40.34
37.0'., 51.1 51.1 100.321 740.25 860.491 60.12' 289.161 1 60.121 1 38.9 38.85
38.01 49.21 49.2 96.40 721.88 840.571 59.35 289.121 59.35 37.4 37.36
39.0 47.21 47.2 92.47 701.321 818.281 58.48 289.07' 58.48, 35.9 35.87
40.0 45.31 45.3 88.55 678.731 793.791 57.53 289.02 57.53' 34.4 34.38
41.0 43.31 43.3, 84.62 654.16 767.28 56.56 288.95 56.561 32.9 32.89
42.01 41.3 41.31 80.70' 627.69 738.781 55.55, 288.88; 1 55.551 31.4 31.40
43.01 39.4 39.4 76.77' 599.451 708.391 54.47 i 288.811 ( 54.471 29.9 29.91
44.0 37.41 37.4 72.85 569.561 676.221 53.33 288.721 1 53.33 28.4 28.41
45.0 35.4 35.41 68.92 538.15 642.411 52.13 288.6411 1 52.131 26.9 26.92
46.0 33.5 33.51 65.00 505.33 607.07 50.87 288.55 50.87 25.4 25.43
47.0 31.5 31.5: 61.07, 470.94' 570.32 49.69 288.45 49.69 23.9 23.94
48.0 29.61 29.6 57.151 434.81! 532.01 48.601 288.341 48.60 22.51 22.45
49.0' 27.6' 27.6, 53.221 397.021 491.95 47.47'1 288.221 1 47.47 21.0 20.96
50.01 25.6, 25.61 49.301 357.681 450.241 46.281 288.091 1 46.28' 19.5 19.47
51.01 23.71, 23.7 45.371 317.181 406.9811 44.90 287.96 1 44.90 18.0 17.98
52.01 21.71 21.71 41.451 276.471 362.55 43.04 287.78 1 43.04 16.5 16.49
53.01 19.7; 19.7 37.521 235.561 317.92 41.18 287.61 1 41.18 15.0 15.00
54.01; 17.8' 17.8 33.601 195.89''1 273.08 38.601 287.3911_ 38.60 13.5 13.51
55.0' 15.8 15.8 29.6711 159.521 229.49 34.9811 287.091, 34.981 12.0 12.02
56.01 13.9, 13.9 25.75, 130.831 189.191 29.181 286.751 1 29.18 10.5 10.52
- 57.0 11.9 11.9 21.821 109.73 156.581 23.421 286.441 1 23.42 9.0 9.03
58.0 9.91 9.9 17.901 93.55 131.561 19.00' 286.211 1 - 19.00 7.5 7.54
59.0 8.01 8.0 13.971, 80.54 111.441 15.45' 286.021 1 15.45 6.1 6.05
60.06.0 6.0 10.051 68.50 94.5111 13.00 285.85 1 13.00 4.6 4.56
- 61.0 4.0 4.0 6.1211 57.04 78.551 10.76 285.69 10.761 3.1 3.07
62.0 2.11 2.1 2.201 45.98 63.161 8.59 285.54 8.59 1.6 1.58
63.0 0.11 0.1 0.121 35.22 48.181 6.48 285.391 6.481 0.1 0.09
64.0 0.01 0.0 0.00, 25.99 35.33'1 4.67 285.27' 4.671 1 0.0 0.00
PEAK FLOWS 1
F
1 82.43 82.43 1 62.34 1 289.29 62.34 1 62.62 62.62
dra.xls
0.00 indicates inital condition Exhibit D-1
EXHIBIT"D-1"
PROPOSED DETENTION POND ROUTING
Duck Haven 8
ID.A.# ID.A.# 1PondRouting ;EVENT= 50 I D.A.#
1
ac
w
w
. o
Zd z c; a u) a)
0o m + a d c a c - + aa w QE-
F-
= (I)p C > QO Od O N N O R W O a W w
Qp , 93.71, 71.1
Tc 21.01 1 21.0
inc 1.0 i I I1 1
Time ' cfs I cfs cfs I _cfs I cfs cfs ft cfs cfs cfs
0,0 0.01 0.0 4.46 0.00 0.00 0.00 284.75 0.00 0.0 0.00
1.0 4.51 4.5 13.37, 3.53 4.46 0.46 284.89 0.46 3.4 3.38
2.01 8.9' 8.9' 22.28' 12.75 16.901 2.08 285.09 1 2.08 6.8 6.77
3.0 13.41 13.4 31.19 25.77 35.031 4.63 285.27 4.63 10.2 10.15
4.0 17.81 17.8 40.10. 41.53 56.961 7.721 285.48 7.72' 13.5 13.54
5.0 22.3', 22.3 49.0111 59.25 81.631 11.191 285.72 11.19 16.9 16.92
6.0 26.7 26.71 57.92 78.391 108.26 14.941 285.99' 14.94 20.3 20.31
7.0 31.21 31.21 66.83, 96.62 136.31 19.84 286.251 19.84 23.7 23.69
8.01 35.61 35.61 75.751 114.19 163.461 24.64 286.51 24.64 I 27.1 27.08
9.01 40.11 40.11 84.6611 131.31 1 189.93 29.31 286.76 29.31 30.5 30.46
10.01 44.6 44.6 93.571 148.241 215.97 33.861 287.001 33.86 33.8 33.85
11.0 49.0 49.0 102.48 169.801 241.81 36.00 287.181 36.00 37.21 37.23
12.0 53.51 53.5 111.39, 195.22 272.28 38.53 287.381 38.53 40.6'1 40.62
13.0' 57.9,. 57.9' 120.301 225.20] 306.61 40.70 287.56 40.70 44.01 44.00
14.0 62.41 62.4 129.21 260.851 345.51; 42.33 287.72 42.331 47.4 47.39
15.0 66.8' 66.81 138.13 301.68 390.06 44.19 287.89 44.191 I 50.8, 50.77
16.01 71.3 71.3 147.04 347.84 439.801 45.981 288.06 45.981 54.21 54.16
17.0 75.7, 75.7 155.95' 3- 99.78 494.871 47.55, 288.23 ; 47.551 57.5] 57.54
18.0'] 80.21 80.21 164.861 457.171 555.72' 49.28] 288.411 49.28 60.91 60.93
19.01 84.71 84.7 173.77! 519.221 622.03, 51.41 288.59 51.41 64.3 64.31
20.01 89.11 89.11 182.681 585.151 692.99 53.92 288.771 53.92 67.7 67.70
21.0, 93.6 93.6 185.041 654.67 767.83 56.58 288.96' 56.58 71.1 71.08
22.01 91.5 91.5 180.72 721.091, 839.71 59.31 289.12 59.31 69.5 69.49
23.01{, 89.2 89.2 176.26 778.361 901.811 61.72 289.25 61.72 67.8 67.80
24.0', 87.0 87.0 _ 171.81 827.07', 954.621 63.78 289.37 63.78 , 66.1 66.10
25.0 84.81 84.8 167.35 867.891 998.881 65.49! 289.47 65.491 1 64.4 64.41
26.0 82.61 82.6' 162.90 901.441 1035.24 66.90', 289.54 66.901 62.71 62.72
27.01 80.3 80.3 158.44 928.30 1064.34 68.021 289.601 68.021 61.0; 61.03
28.01 78.11 78.1 153.981 948.98 1086.741 68.881 289.641' 68.88 59.31 59.33
29.01 75.91 75.91 149.531 963.96 1102.971 69.50 289.671 1 69.50, 57.6; 57.64
30.0 73.7 73.71 145.071 973.67 1113.491 69.91 289.691 I 69.911 55.9; 55.95
31.0 71.4, 71.4 140.621 978.52 1118.741 70.11' 289.701 1 70.111 , 54.3 54.26
32.0 69.21 69.2 136.16 978.89; 1119.141 70.131 289.701 70.13 52.6 52.56
33.0' 67.01 67.0 131.71 975.111 1115.05 69.971 289.691 1 69.97 50.9 50.87
34.0 64.71 64.7 127.25 967.51 1106.821 69.651 289.681 69.65 1 49.2' 49.18
35.01 62.51 62.51 122.79 956.391 1094.761 69.191 289.65 69.191 47.5 47.49
36.0 60.3 60.31 118.34 942.001 1079.18 68.591 289.62 68.59 45.8 45.80
37.0 58.1 58.11 113.88 924.611 1060.34 67.86, 289.591 67.86 44.1 44.10
38.0 55.8 55.81 109.431 904.451 1038.50. 67.021 289.55 i 67.021 1 42.4 42.41
39.01 _ 53.6 53.6' 104.97 8- 81.72 1013.8811 66.08; 289.50 66.08; I 40.7 40.72
40.01 51.4 51.4' 100.52. 856.651 986.701 65.02; 289.44 65.02 L_ 39.01 39.03
41.0 49.1 49.1' 96.067 829.421 957.171 63.87 289.38 63.87 37.3' 37.33
42.0 46.9 46.9 91.611 800.201 925.481 62.64, 289.31 62.64 35.6 35.64
43.0 44.7 44.7 87.15! 769.131 891.801 61.341 289.231 61.341 1 33.9 33.95
44.0_ 42.5 42.5 82.691 736.371 856.28 59.961 289.16 59.961 32.37 32.26
45.0, 40.21 40.2 78.241 702.04 819.06 58.511 289.07 58.51 30.6 30.56
46.01 38.0' 38.0 73.781. 6- 66.24 780.28 57.021, 288.991 57.02 28.9 28.87
47.0 35.8, 35.8 69.33 628.84 740.03 55.591 288.891 55.59 27.21 27.18
48.0 33.5; 33.5 64.87 589.961 698.171 54.11 288.781 54.111 25.5 25.49
49.0 31.3 31.3 60.42' 549.691 654.831 52.57 288.67 52.571 23.81 23.79
50.0 _ 29.1. 29.11 55.961 508.141 610.11' 50.98 288.56; 50.981 _ 22.11 22.10
51.0 26.9, 26.9. 51.50 465.08', 564.10 49.51 288.431 49.511 20.4: 20.41
52.0, 24.611 24.6'; 47.05 420.251 516.58 48.161 288.29 48.161 18.7, 18.72
53.01 22.4 22.41 42.591 373.77 467.30' 46.77 288.14 , 46.771 17.01 17.02
54.01 20.2 20.2 38.141 325.78 416.36 45.29 287.99 I 45.291 15.3 15.33
55.01 18.0. 18.0 33.6811 277.72 363.92 1 43.10 287.79 I 43.101 13.6 13.64
56.0 15.7 15.7 29.23! 229.60 311.401 40.90 287.58 40.90111 -r-
.91 11.95
• 57.0 13.51 13.5 24.7711 183.99 258.821 37.41 287.29 37.411 10.3 10.25
58.0 11.31 11.3 20.311 143.491 208.761 32.641 286.94 32.641 8.6 8.56
59.0 9.01 9.0 15.861 114.411 163.81, 24.701 286.51 24.701 6.91 6.87
60.0 6.81 6.8 11.401 92.72 130.27' 18.781 286.20 18.78 5.21 5.18
' 61.01 4.6 4.6 6.95 75.411, 104.12, 14.36 285.95 I 14.36 3.51 3.49
62.0' 2.4 2.4 2.491 59.77 82.361 11.29 285.73 11.29 1 1.8 1.79
63.0 0.1 0.1 0.131 45.34 62.27 8.46 285.53 8.46 0.1 0.10
64.01 0.01 0.0, 0.001 33.27 45.47 6.101 285.37 1 6.10, 0.01 0.00
1 I I I 1 1
1 I
PEAK FLOWS I
I 93.57 , 93.57 1 I 70.13 289.70 70.13 71.08 1 71.08
dra.xls
0.00 indicates inital condition Exhibit D-1
EXHIBIT"D-1"
PROPOSED DETENTION POND ROUTING
Duck Haven 8
1 D.A.# D.A.# Pond Routing EVENT= 1 100 1 D.A.#
a1 in a I aw
Om• I. .
wiZin+ 2atc � p � Fa1 aaio 1- OF toao cNaw wi oN I c w a
Qp 1 97.71 74.2
Tc , 21.01 ' I I 21.0
inc 7 1.01 1
Time cfs ( cfs cfs 1 cfs cfs I cfs ft cfs cfs cfs
0.0 0.01 0.0 4.651 0.00 0.00' 0.00 284.75 0.00 0.0_1 0.00
1.0 4.61 4.6 13.951 3.69 4.65 0.48 284.89 0.48 ! 3.5 3.53
2.0; 9.31 9.3 23.251 13.28 17.64 2.18 285.09 2.18 7.1 7.06
3.01 13.91 13.91 32.551 26.851, 36.52 4.84! 285.28 4.84 10.6 10.60
4.0 18.61 18.6 41.85 43.28 59.391 8.061 285.51 8.06 14.1 14.13
5.0 23.2 23.2 51.15 61.76 85.12' 11.68 285.76 11.681 17.7 17.66
6.0 27.9 27.9 60.451 81.49 112.91 15.71 286.03 15.71' 21.21 21.19
7.0 32.5 32.5, 69.751 100.26 141.93 20.84 286.31 20.84 24.7 24.73
8.01 37.21 37.21 79.041 _ 118.421 170.01 25.79! 286.57 25.79 28.3 28.26
9.01 41.8I 41.8 88.34! 136.18 197.471 30.64! 286.831 30.64 31.8 31.79
10.0 46.51 46.5 97.64 155.38 224.531 34.57 287.06 1 34.57 35.31 35.32
11.0 _ 51.1 51.1 1 106.941 179.16 253.03_ 36.93 287.25 36.931 38.91 38.85
12.0 55.8 55.8 116.24! 206.75, 286.10 39.671 287.47 39.67 1 42.41 42.39
13.01 60.4! 60.41 125.541 240.22 322.991 41.391 287.63 41.391 45.91 45.92
14.01 65.1' 65.1 134.84 279.41 365.761 43.1811 287.791 43.181 49.51 49.45
15.0 69.7 69.7 144.14 323.84 414.251 45.201 287.98 45.201 1 53.01 52.98
16.0 74.4 74.41 153.441374.42' 467.981 46.781 288.15 46.781 56.51 56.52
17.01 79.01 79.01 162.741 430.891 527.85! 48.48 288.321 48.48 60.0, 60.05
18.0 83.7 83.7 172.041 492.831 593.62, 50.401 288.52! 50.40 63.6 63.58
19.0 88.3 88.3 181.34 559.021 664.871 52.921 288.70 52.92' 67.1 67.11
20.0 93.0 93.0 190.64 629.15 740.361 55.601 288.89 55.601 70.61 70.64
21.01 97.6, 97.6: 193.101 702.711 819.791 58.541 289.081 1 58.54 74.2! 74.18
22.01 95.5 95.5 188.5911 772.83 895.811 61.49 289.241 61.49 72.51 72.51
23.01 93.1 93.1 183.9411 833.341 961.421 64.041 289.381 I 64.04: 70.71 70.75
24.0', 90.81 90.81' 179.291 884.861 1017.28 66.211 289.511 66.21] 69.0'', 68.98
25.01 88.51 88.5! 174.64 928.131 1064.15. 68.01 289.601 68.01167.2!! 67.22
26.01 86.2 86.2 169.991 963.781 1102.77 69.501 289.671 1 69.501 65.5 65.45
27.01 83.8 83.8 165.34 992.391 1133.7711 70.69' 289.73 70.69 1 63.7 63.68
28.0 81.5 81.51 160.69 1014.511 1157.73 71.61! 289.77' 71.61! 1 61.9 61.92
29.0. 79.211 79.21 156.0411 1030.631 1175.20, 72.2811 289.811 72.28 60.2, 60.15
30.0 76.91 76.91 151.391 1041.23 1186.671 72.721, 289.83! 72.721 58.4 58.39
31.0 74.5 74.5 146.741 1046.711 1192.621 72.95' 289.84! 72.95 _ 56.6 56.62
32.0 72.2' 722 142.09, 1047.481 1193.451 72.981 289.84' 72.981 54.9 54.85
33.0, 69.9 69.91 137.44 1043.901 1189.571 72.841 289.84 72.841 53.1 53.09
34.0 67.61 67.6' 132.79! 1036.311 1181.34' 72.52 289.82 ! 72.52! I 51.31 51.32
35.0 65.2 j 65.2 128.141 1025.001 1169.10! 72.051 289.80 72.051 49.61 49.56
36.0 62.9 62.9 123.491 1010.28 1153.15 71.43" 289.771' 71.431 47.81 47.79
37.0' 60.6, 60.6 118.84 992.3911 1133.77 70.69!, 289.73! 70.69 1 46.011 46.02
38.01 58.3 58.3! 114.19, 971.591 1111.241. 69.82 289.69 69.821 1 44.3 44.26
39.0 55.91 55.9; 109.541 948.10' 1085.781 68.84 289.64 1 68.84, I 42.5 42.49
40.0 53.6! 53.6 104.89! 922.12 1057.64! 67.76 289.581 1 67.761 1 40.71 40.73
41.01 51.3 51.3 100.2411 893.85 1027.011 66.58 289.521 1 66.58! 1 39.0 38.96
42.01 49.0 49.01 95.591 863.48 994.09 65.311 289.461 65.311_________ 37.21 37.19
43.0 46.61 46.6 90.941. 831.181 959.07 63.951 289.381 63.951 35.41 35.43
44.01 44.3 44.3 86.301 797.1011 922.12' 62.51 289.301 62.51 33.7 33.66
45.0; 42.0 42.0 81.65 1 761.371 883.39, 61.01 1 289.21 61.01' 31.9 31.89
46.0 39.7 39.7 77.001 724.14 843.02 59.441 289.13 59.44, 30.1 30.13
47.0 37.31 37.3, 72.35 685.51 801.13! 57.81' 289.031 57.811 I 28.4' 28.36
48.01 35.0! 35.01 67.70 645.41 757.851 56.22, 288.931 I 56.221 26.6 26.60
49.0 _ 32.7 32.7 63.05 603.83' 713.101 54.641 288.82' 54.641 24.81 24.83
50.0 30.4 30.4 58.40 560.88! 666.88! 53.00 288.70 53.00 23.11 23.06
51.01 1
28.0 28.0 53.751 516.67 619.281 51.311 288.58_ 51.31, 21.31 21.30
52.01 25.7 25.71 49.101 471.03 570.41 49.6911 288.45 49.69' 19.51 19.53
53.0, 23.4 23.41 44.451 423.601 520.13 _ 48.261 288.30 48.261 17.8 17.77
54.0! 21.1 21.1 39.801 374.471 468.04 46.79' 288.15' 46.79 16.0' 16.00
55.0 18.7 18.7 35.151 323.86 414.271 45.20: 287.98, 45.20 14.2, 14.23
56.0 16.4 16.4 30.50 273.23 3 42.89 287.77 42.891 1 12.5 12.47
• 14.1! 14.1 25.851 222.56 303.72 40.581 287.55 40.581 1 10.7 10.70
58.0! 11.8 11.81 21.201 175.30 248.41 36.551 287.22 36.55! I 8.9 8.94
59.0 9.4 9.4' 16.55 135.56 196.501 30.47 286.821 1 30.471. 7.2 7.17
60.0 7.1 7.1 11.90 106.85'. 152.111 22.631 286.40 22.63. 5.4'11 5.40
• 61.0 4.8 4.8 7.251 85.261 118.75! 16.741 286.091 1 16.74 3.61 3.64
62.01 2.5 2.5' 2.60; 67.07 92.51': 12.72 285.83' 1 12.72 1.9' 1.87
63.01 0.1 1 0.11 0.141 50.66 69.67 9.51 285.61' 9.51 ! 0.1 0.10
64.01 0.0 0.01 0.00, 37.10 50.801 6.851 285.42 6.851 1 0.01 0.00
PEAK FLOWS 1 - - 1
97.64 97.64 i72.98 I 289.8472.98 : 1 74.18 1 74.18
dra.xls
0.00 indicates inital condition Exhibit D-1
EXHIBIT"D-1"
PROPOSED DETENTION POND ROUTING-PLUGGED CONDITION
Duck Haven 8
D.A.# 'D.A.# IPond Routing EVENT= I 100 j I D.A.#
It I
x' w oam
z� om z + aI
o 7 < a < Fo m 1
c o + c > F- p wW I- y
d V IICN N d W Oa
O w
Qp 97.7! 74.2
Tc 21.01 1 I I 21.0
inc I 1.0
Time I cfs 1 cfs I cfs I cfs I cfs cfs ft cfs cfs cfs
0.0 _ 0.0 0.0, 4.651 0.00 0.00 0.00 288.50 ill 0.00 0.0 0.00
1.0 4.6'1 4.61 13.951 4.651 4.65 0.00 288.50 0.00 3.5 3.53
2.0 9.31 9.31-11- 1 18.601 18.60 0.001 288.50 j 0.00 7.1 7.06
3.01 13.9 13.91 32.5511 41.85 41.85 0.00 288.50 0.00' 10.6 10.60
4.0' 18.6 18.6 41.851 74.39, 74.39, 0.00 288.50 0.00 14.11 14.13
5.0 23.21 23.2! 51.151 -116.241 116.24 0.00 288.50 0.00 17.71 17.66
6.01 27.91 27.9' 60.451 167.39 167.39 0.00 288.501 0.00 21.2 21.19
7.0' 32.51 32.5 69.75 227.83 227.83 0.00 288.50 0.00 24.7 24.73
8.0 37.2 j 37.21 79.04 297.581 297.58' 0.00 288.501 0.00' 28.3] 28.26
9.01 41.8 41.8 88.341 376.62 376.621 0.001 288.50 0.00' 31.8' 31.79
10.0 46.5 46.5 97.641 464.97 464.97 0.00 288.50 1 0.00 35.3' 35.32
11.0 51.1 51.1 106.94 561.91 562.61 I 0.35, 288.57 0.35 38.9] 38.85
12.01 55.811 55.81. 116.24 665.241 668.851 1.81] 288.84 1.81 42.41 42.39
13.0 60.41 60.41 125.5411 773.991 781.48' 3.751 289.11 j 3.75 45.9 45.92
14.0 65.111 65.11 134.8411 886.941 899.53 6.291 289.38 1 6.29 49.5 49.45
15.01 69.711 69.7' 144.141 1003.55! 1021.78 9.111 289.63 9.11 53.0 52.98
16.0 74.41 74.4 153.441, 1123.331 1147.70 12.18' 289.87 1 12.181 56.5 56.52
17.0 79.01 79.0 162.741 1241.401. 1276.77 17.69 290.11 17.691 60.0 60.05
18.0 83.7' 83.71 172.0411 1326.861 1404.141 38.64 290.301 38.641 63.6 63.58
19.011 88.3 88.3 181.341 1385.43' 1498.90 56.741 290.431 56.741 67.11 67.11
20.01 93.0, 93.0 190.64 1425.45 1566.761 70.66 290.52] 70.66 70.61 70.64
21.01 97.61 97.6' 193.10, 1450.28 1616.091 82.90'1 290.58' 82.90, 74.21 74.18
22.01 95.51 95.5 188.59 1464.0211 1643.38 89.6811 290.61 89.68; 72.5 72.51
23.0 93.11 93.111 183.94 1468.67 1652.61, 91.97, 290.62 91.97 70.7] 70.75
24.011 9211 90.8 179.29 1468.67 1652.61 91.971 290.62 91.97 69.01 68.98
25.01' 88.511 88.5 174.6411 1466.331 1647.961 90.821 290.62 90.82 I 67.2 67.22
26.0 86.21 86.21 169.991 1462.81: 1640.9711 89.081 290.61 1 89.08, 65.5 65.45
27.01 83.8' 83.81 165.341 1458.69 1632.8011 87.051 290.60 87.051 63.711 63.68
28.01 81.5 81.5 160.691 1454.28 1624.0311 84.881 290.59 84.881 I 61.91 61.92
29.01, 79.2 79.2 156.041 1449.72: 1614.971 82.631 290.58' 1 82.6311 1 60.2 60.15
30.01 76.91 76.91 151.39 1445.081 1605.76,11 80,3411 290.57 80.34] 58.4 58.39
31.01 74.5' 74.5 146.74 1440.411 1596.481 78.031 290.56, 78.0311 56.6 56.62
32.01 72.2 72.2 142.09 1435.72 1587.1511 75.72 290.55' 75.7211 54.9, 54.85
33.01 69.9 69.91 137.44 1431.01 1577.81 73.401 290.531 73.4011 53.11 53.09
34.01 67.6, 67.61 132.79 1426.301 1568.45 71.08 290.52 71.081 51.31 51.32
35.0' 65.21 65.211 128.14 1421.591 1559.09 68.75 290.51 68.751 1 49.61 49.56
36.0 62.9 62.91 123.49 1416.851 1549.73, 66.44'. 290.50 66.44 1 47.81 47.79
37.0 60.61r 60.61 118.841, 1411.041 1540.34 64.651 290.491 64.65 46.01 46.02
38.0. 58.3' 58.3,. 114.191 1404.581 1529.891 62.6511 290.47 62.651 I 44.3' 44.26
39.01 55.9 55.91 109.5411 1397.71 1518.77, 60.53''1 290.46 60.531 42.5, 42.49
40.01 53.6 53.611 104.891 1390.59 1507.26, 58.331 290.44 1 58.3311 40.7' 40.73
41.01 51.3 51.31 100.2411 1383.321 1495.491 56.081, 290.42 56.081 39.0! 38.96
42.011 49.01 49.0 95.59' 1375.951 1483.561 53.81' 290.411 53.81 1 37.21 37.19
43.01 46.6 46.6 90.94' 1368.52j 1471.541 51.511 290.39' 1 51.51 1 35.411 35.43
44.01 44.3 44.3 86.30' 1361.051 1459.461 49.211 290.37] 49.211 j 33.71 33.66
45.01 42.0 42.0 81.65] 1353.5611 1447.351 46.89 290.361 46.891 31.91 31.89
46.0! 39.71 39.71 77.00 1346.061 1435.211 44.57 290.341 44.57'1 30.11 30.13
47.01 37.3F 37.31 72.35 1338.551 1423.061 42.25 290.321 42.251 28.41 28.36
48.01 35.0 35.0' 67.70 1331.0311 1410.9011 39.931 290.31; 39.931 26.61 26.60
49.01 32.7 32.7 63.05 1323.511 1398.731 37.61 290.29' 37.611 24.811- 24.83
50.0, 30.4 30.4] 58.40 1315.99 1386.56 35.28 290.27 35.281 1 23.1 23.06
51.01 28.0, 28.01 53.7511 1308.47 1374.39 32.96 290.26 32.96] 1 21.3] 21.30
52.0 25.71 25.71 49.101 1300.94 1362.22 30.64 290.24 30.64, 1 19.5 19.53
53.0 23.4 23.4 44.451 1293.421 1350.04 28.31 290.221 28.31 17.8 17.77
54.0 21.1 21.11 39.80'1 1285.901 1337.871 25.991 290.201 25.991 16.0 16.00
55.0 18.71 18.71 35.15', 1277.351 1325.691 24.171 290.19 24.171 14.2 14.23
56.0 16.41 16.4 30.5011 1267.65 1312.501 22.421 290.17 22.421 1 12.51 12.47
57.01 14.11 14.1 25.8511 1257.111 1298.1511 20.52 290.14 20.521 1 10.7 10.70
58.0 11.81 11.8 21.2011 1245.951 1282.961 18.51 290.121 1 18.51' 8.91 8.94
59.0 9.41 9.4 16.55 1233.8011 1267.15 16.67 290.091 1 16.67 , 7.21 7.17
60.0' 7.111 7.1 11.90 1218.811 1250.351 15.77 290.061 1 15.77 5.41 5.40
- 61.01 4.81 _ 4.8 7.25 1201.281 1230.711 14.71, 290.031 I 14.71' 3.61 3.64
62.0' 2.51- 2.5 2.60 1181.201 1208.531 13.66 289.99' 13.66 1.91 1.87
63.0 0.1 0.1 0.1411 1157.6811 1183.80 13.06 289.94 13.061 0.1, 0.10
64.01 0.0 0.0 0.001 1132.97 1157.82 12.431 289.891 12.43; 0.0 j 0.00
II
PEAK FLOWS I ---,,
97.64 I 97.64 I 1 91.97 • 290.62 ! 91.97 1 I 74.18 I 74.18
dra.xls
0.00 indicates inital condition Exhibit D-1
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DRAINAGE REPORT
FOR
DUCK HAVEN SUBDIVISION
PHASE 8
ihve
March 2015
w
PREPARED FOR:
66
SMILING MALLARD DEVELOPMENT, LTD.
3608 EAST 29TH STREET
BRYAN, TEXAS 77802
979-846-4384
lab
war
MBESI No. 10620051
INN
McCLURE & BROWNE ENGINEERING/SURVEYING, INC.
uvg
p 1008 Woodcreek Dr.,Suite 103•College Station,Tx.77845•(979)693-3838 Engineer Reg.No.F-458
--- Survey Reg.No.101033-00
Duck Haven Subdivision, Phase 8
Stormwater Management Technical Design Summary Report
MBESI No. 10620051
PART 1 —Executive Summary Report
Section 1 — Contact Information
Project Designer: McClure and Browne Engineering and Surveying, Inc.
1008 Woodcreek Drive, Suite 103
College Station, TX 77845
979-693-3838
Project Developer: Smiling Mallard Development, Ltd.
3608 East 29th Street
Bryan, Texas 77802
Section 2— General Information and Project Location
This development is the 8th phase of a multiphase subdivision. Phase 8 consists of 13 lots. The phase
is located in the Duck Haven Village which is along FM 2154 (Wellborn Road). Phase 8 is located near
the intersection of Drake Drive and Wigeon Trail Drive. This phase of the subdivision has been
analyzed as part of the Phase 5 Drainage Report submitted in October, 2007. The development is
entirely located within the Brazos County limits.
The project site is in the Peach Creek watershed. According to the Flood Insurance Rate Maps for
Brazos County, Texas and incorporated area, Map Number 48041C0375E effective May 16, 2012; no
portion of this property is located in a 100-year flood hazard area.
Culvert pipe calculations are shown with this submittal.
The culverts and ditches peak runoffs were found using the Rational Method. A runoff coefficient (c) of
0.50 was used for residential areas since all the lots have an area greater than 1 acre. The culverts and
„r ditches were analyzed using Microsoft Excel spreadsheets which utilizes Manning's Equation for the
analysis.
Section 3 —Reference
.4,444 Exhibit A Technical Design Summary
Exhibit B-1 Drainage Area Map—Culverts and Ditches
Exhibit B-2 Drainage Area Map—Detention Pond (Existing)
Exhibit B-3 Drainage Area Map—Detention Pond (Proposed)
h Exhibit C-1 Drainage Area Calculations—Culverts and Ditches
Exhibit C-2 Drainage Area Calculations—Detention Pond
Exhibit C-3 Culvert Calculations
Exhibit C-4 Detention Pond Calculations
Drainage Report 1
Duck Haven Subdivision, Phase 8
EXHIBIT A
Technical Design Summary
Drainage Report
Duck Haven Subdivision, Phase 8
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
The Cities of Bryan and College Station both require storm drainage design to follow these
Unified Stormwater Design Guidelines. Paragraph C2 of Section III (Administration) requires
submittal of a drainage report in support of the drainage plan (stormwater management plan)
proposed in connection with land development projects, both site projects and subdivisions.
That report may be submitted as a traditional prose report, complete with applicable maps,
graphs, tables and drawings, or it may take the form of a "Technical Design Summary". The
format and content for such a summary report shall be in substantial conformance with the
description in this Appendix to those Guidelines. In either format the report must answer the
questions (affirmative or negative) and provide, at minimum, the information prescribed in the
"Technical Design Summary" in this Appendix.
The Stormwater Management Technical Design Summary Report shall include several parts
as listed below. The information called for in each part must be provided as applicable. In
addition to the requirements for the Executive Summary, this Appendix includes several
pages detailing the requirements for a Technical Design Summary Report as forms to be
completed. These are provided so that they may be copied and completed or scanned and
digitized. In addition, electronic versions of the report forms may be obtained from the City.
Requirements for the means (medium) of submittal are the same as for a conventional report
as detailed in Section III of these Guidelines.
Note: Part 1 — Executive Summary must accompany any drainage report
required to be provided in connection with any land development project,
regardless of the format chosen for said report.
Note: Parts 2 through 6 are to be provided via the forms provided in this
Appendix. Brief statements should be included in the forms as requested,
but additional information should be attached as necessary.
Part 1 — Executive Summary Report
Part 2 — Project Administration
Part 3— Project Characteristics
Part 4— Drainage Concept and Design Parameters
Part 5— Plans and Specifications
Part 6—Conclusions and Attestation
STORMWATER MANAGEMENT TECHNICAL DESIGN SUMMARY REPORT
Part 1 — Executive Summary
This is to be a brief prose report that must address each of the seven areas listed below.
Ideally it will include one or more paragraphs about each item.
1. Name, address, and contact information of the engineer submitting the report, and
of the land owner and developer (or applicant if not the owner or developer). The
date of submittal should also be included.
2. Identification of the size and general nature of the proposed project, including any
proposed project phases. This paragraph should also include reference to
applications that are in process with either City: plat(s), site plans, zoning requests,
STORMWATER DESIGN GUIDELINES Page 1 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
or clearing/grading permits, as well as reference to any application numbers or
codes assigned by the City to such request.
3. The location of the project should be described. This should identify the Named
Regulatory Watershed(s) in which it is located, how the entire project area is
situated therein, whether the property straddles a watershed or basin divide, the
approximate acreage in each basin, and whether its position in the Watershed
dictates use of detention design. The approximate proportion of the property in the
city limits and within the ETJ is to be identified, including whether the property
straddles city jurisdictional lines. If any portion of the property is in floodplains as
described in Flood Insurance Rate Maps published by FEMA that should be
disclosed.
4. The hydrologic characteristics of the property are to be described in broad terms:
existing land cover; how and where stormwater drains to and from neighboring
properties; ponds or wetland areas that tend to detain or store stormwater; existing
creeks, channels, and swales crossing or serving the property; all existing drainage 4.4
easements (or ROW) on the property, or on neighboring properties if they service
runoff to or from the property.
5. The general plan for managing stormwater in the entire project area must be
outlined to include the approximate size, and extent of use, of any of the following
features: storm drains coupled with streets; detention / retention facilities; buried
conveyance conduit independent of streets; swales or channels; bridges or culverts;
outfalls to principal watercourses or their tributaries; and treatment(s) of existing
watercourses. Also, any plans for reclaiming land within floodplain areas must be
outlined.
6. Coordination and permitting of stormwater matters must be addressed. This is to
include any specialized coordination that has occurred or is planned with other
entities (local, state, or federal). This may include agencies such as Brazos County
government, the Brazos River Authority, the Texas A&M University System, the
Texas Department of Transportation, the Texas Commission for Environmental
Quality, the US Army Corps of Engineers, the US Environmental Protection Agency,
et al. Mention must be made of any permits, agreements, or understandings that ask
pertain to the project.
7. Reference is to be made to the full drainage report (or the Technical Design
Summary Report) which the executive summary represents. The principal WE
elements of the main report (and its length), including any maps, drawings or
construction documents, should be itemized. An example statement might be: w1
"One -page drainage report dated , one set of arr
construction drawings ( sheets) dated , and a
-page specifications document dated comprise 1116
the drainage report for this project." .r
APP
wok
STORMWATER DESIGN GUIDELINES Page 2 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 2 — Project Administration Start (Page 2.1)
Engineering and Design Professionals Information
Engineering Firm Name and Address: Jurisdiction
McClure & Browne Engineering/Surveying, Inc. City: Bryan
1008 Woodcreek Drive, Suite 103 X College Station
College Station, Texas 77845 Date of Submittal:
(979) 693-3838
Lead Engineer's Name and Contact Info.(phone, e-mail,fax): Other:
Jeffery L. Robertson, P.E.
Supporting Engineering/Consulting Firm(s): Other contacts:
Developer/Owner/Applicant Information
Developer/Applicant Name and Address: Phone and e-mail:
Smiling Mallard Development, Ltd. (979) 846-4384
3608 East 29th Street
Bryan, Texas 77802
Property Owner(s) if not Developer/ Applicant(&address): Phone and e-mail:
Project Identification
Development Name: Duck Haven, Phase 8
Is subject property a site project, a single-phase subdivision, or part of a multi-phase subdivision?
Multi-phase Subdivision If multi-phase, subject property is phase 8 of
Legal description of subject property(phase)or Project Area:
(see Section II, Paragraph B-3a)
Duck Haven, Phase 8
If subject property(phase) is second or later phase of a project, describe general status of all
earlier phases. For most recent earlier phase Include submittal and review dates.
The project is the 8th phase of a multiphase subdivision. At this time the first phases have
been built. The most recent phase submitted was Ph. 7.
General Location of Project Area, or subject property (phase):
Project site is located near the intersection of Wigeon Trail and Drake Drive in Brazos
County, Texas.
In City Limits? Extraterritorial Jurisdiction (acreage):
Bryan: acres. Bryan: College Station: 19.122
College Station: acres. Acreage Outside ETJ:
STORMWATER DESIGN GUIDELINES Page 3 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 2— Project Administration Continued (page 2.2)
Project Identification (continued)
Roadways abutting or within Project Area or Abutting tracts, platted land, or built
subject property: developments:
Widgeon Trail Drive Duck Haven, Phase 4
Duck Haven, Phase 5
Duck Haven, Phase 7
Named Regulatory Watercourse(s)&Watershed(s): Tributary Basin(s):
Phase 8 is located in the Peach Creek Watershed. The nearest tributary is Peach Creek S. f44
Tributary 7.2 (See FEMA Map 48041C0375E) .
Plat Information For Project or Subject Property(or Phase)
Preliminary Plat File#: Final Plat File#: Date:
Name: Pending Approval Status and Vol/Pg: Pending Approval
If two plats, secoe: Fitt:
PP
Status: �—
Q2tP
Zoning Information For Project or Subject Property(or Phase)
ma
Zoning Type: Existing or Proposed? Case Code:
w.r
Case Date Status:
mu
Zoning Type: Existing or Proposed? Case Code:
Case Date Status:
am
Stormwater Management Planning For Project or Subject Property(or Phase)
nning Conference(s)& Date(s): Participants: ""
AN
mu
11110
Preliminary Report Require Submittal Date 'eview Date wr
Review Comments Addressed? Yes No In Wr' ' g? When?
Compliance With Preliminary Drainage R- rt. efly describe (or attach documentation
u°
explaining)any deviation(s)from provisions of P inarY Drainage Report, if any.
err
rr
SO
STORMWATER DESIGN GUIDELINES Page 4 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
um
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 2 - Project Administration Continued (page 2.3)
Coordination For Project or Subject Property(or Phase)
Note: For any Coordination of stormwater matters indicated below, attach documentation
describing and substantiating any agreements, understandings, contracts, or approvals.
Coordina i. Dept. Contact: Date: Subject:
With Other
Departments of
-041114111
Jurisdiction
City(Bryan or
College Station
Coordination With mmarize need(s) &actions taken (include contacts &dates):
Non-jurisdiction
City Needed?
Yes No X
Coordination with Summarize need(s : actions taken (include contacts : sates):
Brazos County
Needed?
Yes No X
Coordination with Summarize need(s) &actions take. in de contacts &dates):
TxDOT Needed?
Yes No X
Coordination with Summarize nes s) &actions taken (include contacts &da = :
TAMUS Needed?
Yes No x
Permits For Project or Subject Property(or Phase)
As to stormwater management, are permits required for the proposed work from any of the entities
listed below? If so, summarize status of efforts toward that objective in spaces below.
Entity Permitted or Status of Actions (include dates)
Approved .
US Army Crops of
Engineers
No x Yes
US Environmental
Protection Agency
No x Yes
Texas Commission on A Stormwater Pollution Prevention Plan must be
Environmental Quality implemented prior to the start of construction
No Yes x according to TPDES General Permit No. TXR150000.
Brazos River
Authority
No x Yes
STORMWATER DESIGN GUIDELINES Page 5 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 3 — Property Characteristics Start (Page 3.1)
Nature and Scope of Proposed Work
Existing: Land proposed for development currently used, including extent of impervious cover?
Existing undeveloped lana. Existing impervious cover is
approximately 0 sf.
Site
evelopment of one platted lot, or two or more adjoining slat -- a s.
Development Building on a e platted lot of undeveloped la •.
Project Building on two or more p a . -d'•'-' • ots of undeveloped land.
rtt
(select all
applicable) Building on a single Is , . adjoining lots, : - •ro•osed plat will not form
a new stye may include ROW dedication to e•' '•• streets).
er(explain):
Subdivision x Construction of streets and utilities to serve one or more platted lots. w r'
Development Construction of streets and utilities to serve one or more proposed lots on ott
Project lands represented by pending plats.
Site projects: building use(s), approximate
(s) floor space, impervious cover ratio.
Describe Subdivisions: number of lots by general type of use, linear feet of streets and
Nature and drainage easements or ROW.
Size of This phase of the subdivision includes 13 lots. The development
Proposed consists of approximately 867 LF of streets and 70' ROW.
Project 1011
ow
Is any work planned on land that is not platted , -.•Iain:
or on land for which platting is not pending? tR
X No Yes ow
FEMA Floodplains
Is any part of subject property abutting a Named Regulatory Watercourse No x Yes
(Section II, Paragraph B1) ora tributary thereof?
Is any part of subject property in floodplain No x Yes Rate Map48041c0375E 10
area of a FEMA-regulated watercourse?
Encroachment(s) sur
into Floodplain Encroac urpose(s): Building site(s) Roa. ng(s)
areas planned? Utility crossing(s) ether(ex. .'• : 0111
No X ess
Yes ---�_
10
•.:e areas not shown on Rate Maps, has work been done toward amending the F
approved Floc). •: . s define allowable encroachments in proposed are. •s am. 00
OP
•r.
10
STORMWATER DESIGN GUIDELINES Page 6 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009 wie
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 3— Property Characteristics Continued (Page 3.2)
Hydrologic Attributes of Subject Property(or Phase)
Has an earlier hydrologic analysis been done for larger area including subject property?
Yes Reference the study(&date) here, and attach copy if not already in City files.
x Duck Haven Subdivision; October, 2006
Is the stormwater management plan for the property in substantial conformance with the
earlier study? Yes x No If not, explain how it differs.
No If subject property is not part of multi-phase project, describe stormwater management
plan for the property in Part 4.
If property is part of multi-phase project, provide overview of stormwater management plan
for Project Area here. In Part 4 describe how plan for subject property will comply
therewith.
Stormwater Detention has been provided for this phase with a
detention pond developed with a previous phase. Improvements will be made
to the existing detention pond upon development of this phase.
Do existing topographic features on subject property store or detain runoff? x No Yes
Describe them (include approximate size, volume, outfall, model, etc).
Any known drainage or flooding problems in areas near subject property? x No Yes
Identify:
Based on location of study property in a watershed, is Type 1 Detention (flood control) needed?
(see Table B-1 in Appendix B)
Detention is required. Need must be evaluated. Detention not required.
What decision has been reached? By whom?
Detention study during Phase 3.
If the need for How was determination made?
Type 1 Detention
must be evaluated: Detention was required and is provided for the entire
Duck Haven Subdivision.
STORMWATER DESIGN GUIDELINES Page 7 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 3 — Property Characteristics Continued (Page 3.3)
Hydrologic Attributes of Subject Property(or Phase) (continued)
Does subject property straddle a Watershed or Basin divide? X No Yes If yes, flo
describe splits below. In Part 4 describe design concept for handling this.
Watershed or Basin Larger acreage Lesse e e
Above-Project Areas(Section II, Paragraph B3-a) ""
Does Project Area (project or phase)receive runoff from upland areas? No X Yes ,,sa
Size(s)of area(s) in acres: 1) 3.44 2) 3) 4)
Flow Characteristics (each instance) (overland sheet, shallow concentrated, recognizable
concentrated section(s), small creek (non-regulatory), regulatory Watercourse or tributary);
Overland flow to proposed ditch lines on Phase 8 streets.
r1.
Flow determination: Outline hydrologic methods and assumptions: vi"
Rational Method used for flow determination.
OP
Does storm runoff drain from public easements or ROW onto or across subject property?
11114
X No Yes If yes, describe facilities in easement or ROW:
011
Olt
Are changes in runoff characteristics subject to change in future? Explain
No. Existing facilities have been built and plat has been filed.
OP
low
Conveyance Pathways (Section II, Paragraph C2)
Must runoff from study property drain across lower properties before reaching a Regulatory
Watercourse or tributary? X No Yes tot
Describe length and characteristics of each conveyance pathway(s). Include ownership of
property(ies). mit
tot
MP
NO
w
rl
STORMWATER DESIGN GUIDELINES Page 8 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009 air
+�r
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 3 — Property Characteristics Continued (Page 3.4)
Hydrologic Attributes of Subject Property(or Phase) (continued)
Conveyance Pathways (continued)
Do drainage If yes, for what part of length? % Created by? x plat, or
easements instrument. If instrument(s), describe their provisions.
exist for any
part of
pathway(s)?
No
Yes
Where runoff must cross lower properties, describe characteristics of abutting lower
property(ies). (Existing watercourses? Easement or Consent aquired?)
Pathway
Areas
Describe any built or improved drainage facilities existing near the property(culverts,
bridges, lined channels, buried conduit, swales, detention ponds, etc).
Nearby
Drainage Do any of these have hydrologic or hydraulic influence on proposed stormwater
Facilities design? x No Yes If yes, explain:
STORMWATER DESIGN GUIDELINES Page 9 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Start (Page 4.1)
Stormwater Management Concept
Discharge(s) From Upland Area(s)
If runoff is to be received from upland areas,what design drainage features will be used to
accommodate it and insure it is not blocked by future development? Describe for each area,
flow section, or discharge point.
rte
Pitt
Discharge(s)To Lower Pro ert ies Section II, Paragraph E1 °'
P Y(� ) ( )
Does project include drainage features (existing or future) proposed to become public via PfPft
platting? x No __Yes Separate Instrument? X No Yes
Per Guidelines reference above, how will 4,44
runoff be discharged to neighboring Establishing Easements (Scenario 1)
Pre-development Release (Scenario 2)
property(ies)? Combination of the two Scenarios
Scenario 1: If easements are proposed, describe where needed, and provide status of actions
on each. (Attached Exhibit#
toto
IIM
Scenario 2: Provide general description of how release(s)will be managed to pre-development +•
conditions (detention, sheet flow, partially concentrated, etc.). (Attached Exhibit#
Improvements to detention pond built with previous phases.
wWe
mu
Combination: If combination is proposed, explain how discharge will differ from pre-
development conditions at the property line for each area (or point)of release. 1■t
row
OIR
If Scenario 2, or Combination are to be used, has proposed design been coordinated with
owner(s)of receiving property(ies)? _ No Yes Explain and provide
IP
documentation.
OD
■E
MP
STORMWATER DESIGN GUIDELINES Page 10 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009 —
OR
wru
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.2)
Stormwater Management Concept (continued)
Within Project Area Of Multi-Phase Project
.-• ' gaining Basins or Watersheds and acres shifting:
Will project result
in shifting runoff
between Basins or
between What design and mitigation is us- . pensate for increased runoff
Watersheds? from gaining basin or watersh-•.
x No
Yes
How will runoff from Project 1. With facility(ies) involving other development projects.
Area be mitigated to pre-
2. Establishing features to serve overall Project Area.
development conditions?
Select any or all of 1, 2, 3. X On phase (or site) project basis within Project Area.
and/or 3, and explain below.
. flared facilit (type &location of facility; design drainage area served; relationship to siz-
Project A -- : (Attached Exhibit#
2. For Overall Project Area (type & loc. of facili 1- • Attached Exhibit#
3. By phase (or site) project: Describe planned mitigation measures for phases (or sites) in
subsequent questions of this Part.
• - aquatic echosystems proposed? No Yes In which phase(s)or
projec _ ?
�•
0
m >- Are other Best Manag- -•-nt Practices for reducing stormwate :• lutants proposed?
w
No Yes Su ••.rize type of BMP and : ent of use:
0
m
Ct
Qa> 0
Z
If design of any runoff-handling -citifies deviate from p . isions of B-CS Technical
Q X Specifications, check ty.- acility(ies)and explain in later qu- ions.
Detention - - ents Conduit elements Cha •-I features
Sw. - Ditches Inlets Valley gutters •.galls
Culvert features Bridges Other
STORMWATER DESIGN GUIDELINES Page 11 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D — TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.3)
Stormwater Management Concept (continued)
Within Project Area Of Multi-Phase Project (continued)
Will Project Area include bridge(s)or culvert(s)? No x Yes Identify type and
general size and In which phase(s).
Proposed 24" RCP culvert on Wigeon Trail
Proposed 24" RCP culvert in Detention Pond
If detention/retention serves (will serve) overall Project Area, describe how it relates to subject
phase or site project(physical location; conveyance pathway(s), construction sequence):
Improvements to existing detention pond in Phase 5 Public Drainage Easement
olom
will serve this phase.
fff
Within Or Serving Subject Property(Phase, or Site)
If property part of larger Project Area, is design in substantial conformance with earlier analysis
and report for larger area? x Yes No, then summarize the difference(s):
Identify whether each of the types of drainage features listed below are included, extent of use,
and general characteristics.
Typical shape? Surfaces?
cam• V-Shape Grass ityp
-o
Steepest side slopes: Usual front slopes: Usual back slopes:
0
>- 4:1 4:1 4:1
a)
0 x Flow line slopes: least .00% Typical distance from travelway:
Varies (Attached Exhibit#
0 0 typical greatest 1.47 o
� z
ait
cc
2 Are longitudinal culvert ends in compliance with B-CS Standard Specifications?
2 x Yes _ No, then explain: 0
yr
rsections or otherwise, do valley gutters cross arterial or collector stre- ..
oUr. Yes If yes explain:
-0
U YW
_c U
U3 a) Are valley gutters proposed to cross . • -- away from an intersection?
o No Yes Explain: •. ser of loca is-_ se
aix / r`
` ca
w
STORMWATER DESIGN GUIDELINES Page 12 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009 tog
a
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.4)
Stormwater Management Concept (continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
• tter line slopes: Least Usual Greatest
Are i ets recessed on arterial and collector streets? Yes No "no",
identify here and why.
Will inlets captu : 10-year design stormflow to prevent flooding of' tersections (arterial
with arterial or colle. or)? Yes No If no, expl.' where and why not.
�.
a)
Will inlet size and placemen •revent exceeding allowae e water spread for 10-year
design storm throughout site (o •hase)? Y-: No If no, explain.
CO
c �
1 Sag curves: Are inlets placed at low poin ." Yes No Are inlets and
conduit sized to prevent 100-year storm • rom ponding at greater than 24 inches?
c Yes No Explain "no"answe
U)
a)
U
Will 100-yr stormflow b- ontained in combination of ROW a • buried conduit on
whole length of all stn ets? Yes No If no, des 'be where and why.
Do desig for curb, gutter, and inlets comply with B-CS Technical Specific.:ons?
es No If not, describe difference(s) and attach justification.
• - any 12-inch laterals used? No Yes Identify length(s) and wher-
used.
Pipe runs between tern Typical Longest
access points (feet):
aa>i Are junction boxes used at each .- d? Yes No If not, explain where
>, and why.
•� o
13
E x
Are downstream soff - at or below upstream soffits? Leas ount that hydraulic
Yes N• If not, explain where and why: grade line ' selow gutter line
(system-wide):
STORMWATER DESIGN GUIDELINES Page 13 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.5)
Stormwater Management Concept (continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
Describe watercourse(s), or system(s) receiving system discharge(s) below
(include design discharge velocity, and angle between converging flow line .
1) atercourse(or system), velocity, and angle?
ami E 2) Watercourse system), velocity, and angle?
c
0 4-
V C
E °' (1)
o E — 3)Watercourse (or system),veloci .-. angle?
17) 2
to
c 7
� O
-a ci
E For each outfall abov , what measures are taken to . event erosion or scour of
nN receiving and all ilities at juncture? 1110
1) .r.
o_ 2)
0
0 3)
Are swale(s)situated along property lines between properties? x No Yes a
Number of instances: For each instance answer the following questions.
WIN
Surface treatments (including low-flow flumes if any):
a
�•
w
cFlow line slopes (minimum and maximum):
0
o A
Z Outfall characteristics for each (velocity,convergent angle, &end treatment).
x
Q Will 100-year design storm runoff be contained within easement(s)or platted drainage
ROW in all instances? Yes No If"no"explain:
a
vas
a
err
a
STORMWATER DESIGN GUIDELINES Page 14 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
+
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.6)
Stormwater Management Concept (continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
Are roadside ditches used? No X Yes If so, provide the following:
a) Is 25-year flow contained with 6 inches of freeboard throughout? X Yes No
Are top of banks separated from road shoulders 2 feet or more? X Yes No
Are all ditch sections trapezoidal and at least 1.5 feet deep? Yes X No
F/5 For any"no" answers provide location(s) and explain:
All Ditches are V-shaped and at least 2' deep
0
conduit is beneath a swale, provide the following information (each instance).
Ins Ince 1 Describe general location, approximate length:
>- Is 100-ye. design flow contained in conduit/swale combination? Ye No
If "no"expla' :
0
U
O co Space for 100-ye:r storm flow? ROW Easement W'.th
z _c Swale Surface typ-, minimum Conduit Type and size, minim and maximum
X To and maximum slopes: slopes, design storm:
scii Inlets Describe how condui 's loaded (from streets/stor ' drains, inlets by type):
c c
a3 cc
L
U —
c
n. o Access Describe how maintenance . cess is p .vided (to swale, into conduit):
4-. m
o E
c L
a) o
= c
c .(7)
a Instance 2 Describe general location, :ppro ate length:
a 03
• U)
c 7 Is 100-year design flow containe. in conduit/swale c. bination? Yes No
o o If "no"explain:
m a
E• t Space for 100-year storm ow? ROW Easement Width
S a Swale Surface type, 'nimum Conduit Type and size, mi urn and maximum
5 m and maximum slope • slopes, design storm:
C co
-03 cn
o Inlets Describe •ow conduit is loaded (from streets/storm drains, inl- by type):
c
� o
2 Access Describe how maintenance access is provided (to swale, into condu. :
STORMWATER DESIGN GUIDELINES Page 15 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D — TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.7)
Stormwater Management Concept (continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
"yes" provide the following information for each instance:
Inst ce 1 Describe general location, approximate length, surfacing:
an
E W
oci Is 100-year design w contained in Swale? Yes No Is swale wholly `
c } within drainage ROW. Yes No Explain "no" . swers:
L
a)
Access Describe how mainte nce access is provide.
z
ox
Instance 2 Describe general location, ape .ximate length, surfacing:
idsiom
r•
m
o E
L a) did
-§ Is 100-year design flow co fined in swale? Yes No Is swale wholly
owithin drainage ROW? Yes No Explain "no' answers:
odd
Access Descri e how maintenance access is provided:
Q W�
Ins nce 3, 4, etc. If swales are used in more than two instances, attach sheet
oviding all above information for each instance.
-w" channels: Will any area(s) of concentrated flow be channelized (deepened
wide -. or straightened)or otherwise altered? No Yes If only s tly
shaped, s-: "Swales" in this Part. If creating side banks, provide informati.- selow.
C-.
m .o Will design repli : e natural channel? Yes No If"no" .r each instance la
o Q describe section shad: &area, flow line slope (min. &max.), s •.ces, and 100-year
w design flow, and amount . reeboard:
'- Instance 1:
o
N
E
a
o Instance 2:
2 +r
E
Z
c x Instance 3:
NIP
SO
STORMWATER DESIGN GUIDELINES Page 16 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
S
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.8)
Stormwater Management Concept (continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
xisting channels (small creeks): Are these used? No Yes
I "yes" provide the information below.
Wi small creeks and their floodplains remain undisturbed? Yes No How
man disturbance instances? Identify each planned location:
For each location, describe length and general type of proposed improv-ment
(including floos slain changes):
For each location, des. ibe section shape & area,flow line sl..e (min. & max.),
surfaces, and 100-year .-sign flow.
a)
Watercourses (and tributaries): tide from fri se changes, are Regulatory
Watercourses proposed to be altered o Yes Explain below.
Submit full report describing proposed c' .ns-s to Regulatory Watercourses. Address
existing and proposed section size and sh.4.e, surfaces, alignment,flow line changes,
> length affected, and capacity, and provid- f documentation of analysis procedures
2and data. Is full report submitted? .s No If"no"explain:
E
a)
vAll Proposed Channel Work: or all proposed chan el work, provide information
requested in next three boxe
If design is to replicate nat al channel, identify location a • length here, and describe
design in Special Design section of this Part of Report.
Will 100-year flo be contained with one foot of freeboard? Y= No If
not, identify loc.. ion and explain:
Are ROi /easements sized to contain channel and required maintenance spate?
es No If not, identify location(s) and explain:
STORMWATER DESIGN GUIDELINES Page 17 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.9)
Stormwater Management Concept (continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
ow many facilities for subject property project? For each provide info. below.
F. each dry-type facilitiy: Facility 1 Facility 2
Acre, served &design volume + 10%
100-yr ,olume:free flow& plugged
Design di- harge (10 yr&25 yr)
Spillway ore- at 100-yr WSE? yes no y•s no
Berms 6 inche above plugged WSE? yes no yes no
Explain any"no" . iswers:
a>
r
For each facility what is 25- design Q, and design of out -t structure?
Facility 1:
0
z Facility 2:
X Do outlets and spillways discharge i,to a public fa,ility in easement or ROW?
Facility 1: Yes No Facilit, 2: Yes No
If"no" explain: •�
m
0
0 0
0
o_ For each,what is velocity of 25-yr desk; disch:rge at outlet? &at spillway?
m Facility 1: & Faci' y 2: &
7.3 Are energy dissipation measures .ed? No Yes Describe type and
u_ location:
O
a)
o)
a
For each, is spillway su ce treatment other than concrete? es or no, and describe:
Facility 1:
Facility 2:
For each,what ► easures are taken to prevent erosion or scour at recz'ving facility?
Facility 1:
0
Facility 2:
If berm are used give heights, slopes and surface treatments of sides.
Facili 1:
'acility 2:
0
STORMWATER DESIGN GUIDELINES Page 18 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
A
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.10)
Stormwater Management Concept (continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
i; tructures comply with B-CS Specifications? Yes or no, and explain if"no":
a)
Facility 1;
a)
73 12
Facility 2:
c
O c
O
4.2 U
oFor additional facilitie : ovide all same information on a sepa - - sheet.
Are parkin. . -as to be used for detention? No Yes
ma.'- m depth due to required design storm?
Roadside Ditches: Will culverts serve access driveways at roadside ditches?
No x Yes If"yes", provide information in next two boxes.
Will 25-yr. flow pass without flowing over driveway in all cases? x Yes No
Without causing flowing or standing water on public roadway? x Yes No
Designs &materials comply with B-CS Technical Specifications? x Yes No
Explain any"no" answers:
U)
oAre culverts parallel to public roadway alignment? x Yes No Explain:
U co
Q) }
a3
a x Creeks at Private Drives: Do private driveways, drives, or streets cross drainage
ways that serve Above-Project areas or are in public easements/ROW?
0
m z x No Yes If"yes" provide information below.
How many instances? Describe location and provide information below.
°• Location 1: All lots will need ditch crossing culverts to
access Wigeon Trail. Each proposed lot will need
a minimum of an 18" culvert.
2 Location 2:
Location 3:
For each location enter value for: 1 2 3
Design year passing without toping travelway?
Water depth on travelway at 25-year flow?
Water depth on travelway at 100-year flow?
For more instances describe location and same information on separate sheet.
STORMWATER DESIGN GUIDELINES Page 19 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.11)
Stormwater Management Concept (continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
Named Regulatory Watercourses (&Tributaries): Are culverts proposed on these
facilities? X No Yes,then provide full report documenting assumptions,
criteria, analysis, computer programs, and study findings that support proposed F:
design(s). Is report provided? Yes No If"no", explain:
�- Arterial or Major Collector Streets: Will culverts serve these types of roadways?
a) 9.in
s X No Yes How many instances? For each identify the
location and provide the information below.
m 2 Instance 1:
> n u°,
Instance 2:
x c
o Instance 3:
0
o .E Yes or No for the 100-year design flow: 1 2 3 X11'
Z E
o Headwater WSE 1 foot below lowest curb top?
.� Spread of headwater within ROW or easement?
v; Is velocity limited per conditions (Table C-11)?
CI)
c Explain any"no" answer(s):
CID as
o c
.2
ii0
o42 Minor Collector or Local Streets: Will culverts serve these types of streets?
u, No X Yes How many instances? 1 for each identify the
-0 location and provide the information below:
0_ a)
Instance 1:Culvert #1 on Wigeon Trail Drive
-o c Instance 2:
c o Instance 3:
41116
0 For each instance enter value, or"yes"/"no"for: 1 2 3
o 0
3 Design yr. headwater WSE 1 ft. below curb top? Yes
< 0 100-yr. max. depth at street crown 2 feet or less? Yes
g Product of velocity(fps)&depth at crown (ft) ? 0
Olt
Is velocity limited per conditions (Table C-11)? Yes
Limit of down stream analysis (feet)? 50'
Explain any"no"answers: A
STORMWATER DESIGN GUIDELINES Page 20 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009 �rw
00
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.12)
Stormwater Management Concept (continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
All Proposed Culverts: For all proposed culvert facilities (except driveway/roadside
ditch intersects) provide information requested in next eight boxes.
Do culverts and travelways intersect at 90 degrees? X Yes No If not,
identify location(s) and intersect angle(s), and justify the design(s):
Does drainage way alignment change within or near limits of culvert and surfaced
approaches thereto? X No Yes If"yes" identify location(s), describe
change(s), and justification:
Are flumes or conduit to discharge into culvert barrel(s)? X No Yes If yes,
identify location(s)and provide justification:
Are flumes or conduit to discharge into or near surfaced approaches to culvert ends?
m No X Yes If"yes" identify location(s), describe outfall design treatment(s):
Areas are protected with Rock Rip-Rap Channel Lining
0
U
Is scour/erosion protection provided to ensure long term stability of culvert structural
�j components, and surfacing at culvert ends? X Yes No If"no" Identify
locations and provide justification(s):
Will 100-yr flow and spread of backwater be fully contained in street ROW, and/or
drainage easements/ ROW? X Yes No if not,why not?
Do appreciable hydraulic effects of any culvert extend downstream or upstream to
neighboring land(s) not encompassed in subject property? X No Yes If
"yes"describe location(s)and mitigation measures:
Are all culvert designs and materials in compliance with B-CS Tech. Specifications?
X Yes No If not, explain in Special Design Section of this Part.
STORMWATER DESIGN GUIDELINES Page 21 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.13)
Stormwater Management Concept (continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
bridge included in plans for subject property project? No Yes
If"ye " rovide the following information.
Name(s)a functional classification of the roadway(s)?
What drainage way(s) is to be c , sed?
1.10
ML
610
A full report supporting al spects of the proposed bridge(s tructural, geotechnical,
hydrologic, and hydr is factors)must accompany this summa eport. Is the report a
provided? es No If"no"explain:
Is a Stormwater Provide a general description of planned techniques:
Pollution Prevention Silt fence and inlet filtration will serve as the ■
Plan (SW3P)
main protection against stormwater pollution. The
Of established for Contractor shall use any other means necessary
project construction?
throughout construction.
co
No X Yes
Special Designs—Non-Traditional Methods
Are any non-traditional methods (aquatic echosystems,wetland-type detention, natural stream SII
replication, BMPs for water quality, etc.) proposed for any aspect of subject property project?
X No Yes If"yes" list general type and location below.
a
a
.YE
• - full report about the proposed special design(s) including rationale for use and A
expected be - ' Report must substantiate that stormwater management ••'- es will not
be compromised, an. . .-intenance cost will not exceed thos- .itional design
solution(s). Is report provided? Yes N. no"explain:
•ok
>lR
us
MP
STORMWATER DESIGN GUIDELINES Page 22 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009 tat
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.14)
Stormwater Management Concept (continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
•ecial Designs—Deviation From B-CS Technical Specifications
If an design(s)or material(s)of traditional runoff-handling facilities deviate from provisions of
B-CS :chnical Specifications, check type facility(ies) and explain by specific detail eleme .
De tion elements Drain system elements Channel features
Culve -atures Swales Ditches Inlets P tfalls
Valley gut _ s Bridges (explain in bridge report)
In table below briefly i.-ntify specific element,justification for deviation(s).
Specific Detail Eleme Justification for Deviation (attach add' '.nal sheets if needed)
1)
2)
3)
4)
5)
Have elements been co. :inated with the City Engineer or her/his desi• ee? For each item
above provide"yes"o• no", action date, and staff name:
1)
2)
3)
4)
Design Parameters
Hydrology
Is a map(s)showing all Design Drainage Areas provided? X Yes No
Briefly summarize the range of applications made of the Rational Formula:
For the Rational Formula we assumed residential areas had a
runoff coefficient of 0.5 for large residential or estate lots.
What is the size and location of largest Design Drainage Area to which the Rational Formula
has been applied? 4.37 acres Location (or identifier): Culvert C.
STORMWATER DESIGN GUIDELINES Page 23 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.15)
Design Parameters(continued)
Hydrology(continued)
In making determinations for time of concentration, was segment analysis used?
X No Yes In approximately what percent of Design Drainage Areas?
As to intensity-duration-frequency and rain depth criteria for determining runoff flows, were any
criteria other than those provided in these Guidelines used? X No Yes If"yes"
identify type of data, source(s), and where applied:
rz
For each of the stormwater management features listed below identify the storm return
frequencies (year)analyzed (or checked), and that used as the basis for design.
Feature Analysis Year(s) Design Year
Ito
StorIr-aitim for arterial and collector streets
Storm drain system for eets
Open channels -�"—
Swale/buried conduit co . 'on in lieu of channel
Swal-
Roadside ditches and culverts serving them 2,5,10,25,50, 100 25
De - -. facilities: spillway crest and its outfall
Detention facilities: .. - and conveyance structure(s)
Detention facilities:volume when ou ged
Culverts serving private drives or str
Culverts serving pus -.. ways
Bri..--. provide in bridge report.
VW
Hydraulics
What is the range of design flow velocities as outlined below? 0
Design flow velocities; 25 year Gutters Conduit Culverts Swales Channels WA
Highest(feet per second) 7.95
0
Lowest(feet per second) 5.93
ea
Streets and Storm Drain Systems Provide the summary information outlined below:
Roughness coefficients used: For street gutters: NA
For conduit type(s) RCP 0.013 Coefficients: or
0
OP
STORMWATER DESIGN GUIDELINES Page 24 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
0
INA
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.16)
Design Parameters(continued)
Hydraulics (continued)
eet and Storm Drain Systems (continued)
For th- ollowing, are assumptions other than allowable per Guidelines?
Inlet coeffi '-nts? No Yes Head and friction losses No Yes
Explain any"ye " answer:
In conduit is velocity general creased in the downstream dire. on? Yes No
Are elevation drops provided at in : s, manholes, and juncti. boxes? Yes No
Explain any"no" answers:
Are hydraulic grade lines calculated and own for .--.ign storm? Yes No
For 100-year flow conditions? es No •ilain any"no" answers:
What tailwater conditi.-s were assumed at outfall point(s)of the storm in system? Identify
each location and - plain:
Open Channels If a HEC analysis is utilized, does it follow Sec VI.F.5.a? Yes No
Outside of straight sections, is flow regime within limits of sub-critical flow? X Yes No
If"no" list locations and explain:
Culverts If plan sheets do not provide the following for each culvert, describe it here.
For each design discharge, will operation be outlet (barrel)control or inlet control?
All culverts will be inlet controlled.
Entrance, friction and exit losses:
A 0.5 entrance and exit loss coefficients are used for sloped end treatments
and square edged headwalls with wingwalls.
Bridges Provide all in bridge report
STORMWATER DESIGN GUIDELINES Page 25 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.17)
Design Parameters(continued)
Computer Software
What computer software has been used in the analysis and assessment of stormwater
management needs and/or the development of facility designs proposed for subject property
project? List them below, being sure to identify the software name and version,the date of the
version, any applicable patches and the publisher
Microsoft Excel Spreadsheet
Part 5— Plans and Specifications,
Requirements for submittal of construction drawings and specifications do not differ due to use of a
Technical Design Summary Report. See Section III, Paragraph C3.
11
Part 6 — Conclusions and Attestation
Conclusions
Add any concluding information here:
The Duck Haven Subdivision, Phase 8 wil: have no adverse impact to downstream
properties and conforms to the overall subdivision repert.
U
attrIr
U
Attestation
Provide attestation to the accuracy and completeness of the foregoing 6 Parts of this Technical
Design Summary Drainage Report by signing and sealing below.
"This report(plan) for the drainage design of the development named in Part B was prepared
im
by me (or under my supervision) in accordance with provisions of the Bryan/College Station
Unified Drainage Design Guidelines for the owners of the property. All licenses and permits
required by any and all state and federal regulatory agencies for the proposed drainage
improvements have been issued or fall under applicable general permits."
(Affix Seal)
wr
Licensed Professional Engineer
ow
State of Texas PE No.
AIS
wr
OP
STORMWATER DESIGN GUIDELINES Page 26 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2009 w,
OP
ft*
EXHIBIT B
Drainage Area Maps
Drainage Report
Duck Haven Subdivision, Phase 8
EXHIBIT C
Runoff and Culvert Calculations
Drainage Report
Duck Haven Subdivision, Phase 8
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EXHIBIT"C-4"
PROPOSED DETENTION POND ROUTING
Duck Haven Phase 8
D.A.# ID.A.# D.A.# D.A.# Pond Routing EVENT= 1 5 D.A.# D.A.4 D.A.# D.A.#
4k c
0m
9 w ± a to 0
a N Z 'i D 2 J O C J Z
Oo. 2 C + C > H O N F-U7
a 2 o R 0 + N u o N m c O Cr % A O X
2 C. 0 0 U C N lV 0. d W 0 C. I-d - d C H W
Qp 41.7 0.0 0.0 0.0 0.0 42.3 0.0
Tc 37.3 0.0 0.0 0.0 0.0 21.8 0.0
inc 1.0 2.0 1.0
Time cfs cfs cfs cfs cfs cfs cfs ft cfs cfs cfs cfs cfs cfs
0.0 0.0 0.0 0.0 0.0 1.12 0.00 0.001 0.00 285.9 0.0 0.0 0.00 0.0 0.0 0.00
1.0 1.1 0.0 0.0 1.1 3.36 0.83 1.12 0.15 285.9 0.0 0.0 0.15 1.9 0.0 1.94
2.0 2.2 0.0 0.0 2.2 5.60 3.10 4.19 0.54 286.0 0.0 0.0 0.54 3.9 0.0 3.89
3.0 3.4 0.0 0.0 3.4 7.83 6.43 8.69 1.13 286.2 0.0 0.0 1.13 1 5.8 0.0 5.83
4.0 4.5 0.0 0.0 4.5 10.07 10.55 14.26 1.86 286.3 0.0 0.0 1.86 7.8 0.0 7.78
5.0 5.6 0.0 0.0 5.6 12.31 15.26 20.62 2.68 286.5 0.0 0.0 2.68 9.7 0.0 9.72
6.0 6.7 0.0 0.0 6.7 14.55 20.39 27.57 3.59 286.7 0.0 0.0 3.59 11.7 0.0 11.67
7.0 7.8 0.0 0.0 7.8 16.79 25.85 34.94 4.55 286.9 0.0 0.0 4.55 13.6 0.0 13.61
8.0 9.0 0.0 0.0 9.0 19.02 31.98 42.631 5.33 287.0 0.0 0.0 5.33 15.6 0.0 15.56
9.0 10.1 0.0 0.0 10.1 21.26 38.81 51.01 6.10 287.1 0.0 0.0 6.10 17.5 0.0 17.50
10.0 11.2 0.0 0.0 11.2 23.50 46.20 60.07 6.941 287.2 0.0 0.0 6.94 19.4 0.0 19.44
11.0 12.3 0.0 0.0 12.3 25.74 54.05 69.70 7.831 287.2 0.0 0.0 7.83 21.4 0.0 21.39
12.0 13.4 0.0 0.0 13.4 27.98 62.28 79.79 8.761 287.3 0.0 0.0 8.76 23.3 0.0 23.33
13.0 14.5 0.0 0.0 14.5 30.22 70.81 90.26 9.721 287.4 0.0 0.0 9.72 25.3 0.0 25.28
14.0 15.7 0.0 0.0 15.7 32.45 79.59 101.03 10.72 287.4 0.0 0.0 10.72 27.2 0.0 27.22
15.0 16.8 0.0 0.0 16.8 34.69 88.60 112.051 11.72 287.51 0.0 0.0 11.72 29.2 0.0 29.17
16.0 17.9 0.0 0.0 17.9 36.93 99.10 123.29 12.09 287.5 0.0 0.0 12.09 31.1 0.0 31.11
17.0 19.0 0.0 0.0 19.0 39.17 111.00 136.03 12.52 287.6 0.0 0.0 12.52 33.1 0.0 33.06
18.0 20.1 0.0 0.0 20.1 41.41 124.20 150.17 12.98 287.7 0.0 0.0 12.98 35.0 0.0 35.00
19.0 21.3 0.0 0.0 21.3 43.65 138.63 165.61 13.491 287.7 0.0 0.0 13.49 36.9 0.0 36.95
20.0 22.4 0.0 0.0 22.4 45.88 154.19 182.27 14.041 287.8 0.0 0.0 14.04 38.9 0.0 38.89
21.0 23.5 0.0 0.0 23.5 48.12 170.81 200.07 14.63 287.9 0.0 0.0 14.63 40.8 0.0 40.83
22.0 24.6 0.0 0.0 24.6 50.36 188.42 218.93 15.25 287.9 0.0 0.0 15.25 42.1 0.0 42.06
23.0 25.7 0.0 0.0 25.7 52.60 207.00 238.78 15.89, 288.0 0.0 0.0 15.89 41.1 0.0 41.09
24.0 26.9 0.0 0.0 26.9 54.84 226.97 259.60 16.311 288.1 0.0 0.0 16.31 40.1 0.0 40.12
25.0 28.0 0.0 0.0 28.0 57.07 248.30 281.81 16.761 288.1 0.0 0.0 16.76 39.1 0.0 39.14
26.0 29.1 0.0 0.0 29.1 59.31 270.91 305.37 17.231 288.2 0.0 0.0 17.23 38.2 0.0 38.17
27.0 30.2 0.0 0.0 30.2 61.55 294.75 330.22 17.73 288.3 0.0 0.0 17.73 37.2 0.01 37.20
28.0 31.3 0.0 0.0 31.3 63.79 319.79 356.31 18.26 288.4 0.0 0.0 18.26 36.2 0.01 36.23
29.0 32.5 0.0 0.0 32.5 66.03 345.97 383.58 18.81 288.4 0.0 0.0 18.81 35.3 0.01 35.26
30.0 33.6 0.0 0.0 33.6 68.27 373.36 412.00 19.32 288.5 0.0 0.0 19.32 34.3 0.01 34.28
31.0 34.7 0.0 0.0 34.7 70.50 402.08 441.62 19.77 288.6 0.0 0.0 19.77 33.3 0.01 33.31
32.0 35.8 0.0 0.0 35.8 72.74 432.10 472.59 20.24 288.7 0.0 0.0 20.24 32.3 0.0 32.34
33.0 36.9 0.0 0.0 36.9 74.98 463.37 504.84 20.74 288.8 0.0 0.0 20.74 31.4 0.0 31.37
34.0 38.0 0.0 0.0 38.0 77.22 495.86 538.35 21.25 288.9 0.0 0.0 21.25 30.4 0.0 30.39
35.0 39.2 0.0 0.0 39.2 79.46 529.53 573.08 21.78 289.0 0.0 0.0 21.78 29.4 0.0 29.42
36.0 40.3 0.0 0.0 40.3 81.70 564.50 608.98 22.24 289.1 0.0 0.0 22.24 1 28.5 0.0 28.451
37.0 41.4 0.0 0.0 41.4 82.71 600.81 646.20 22.69 289.2 0.0 0.0 22.69 1 27.5 0.0 27.481
38.0 41.3 0.0 0.0 41.3 82.04 637.22 683.52 23.15 289.2 0.0 0.0 23.15 26.5 0.0 26.51
39.0 40.7 0.0 0.0 40.7 80.92 672.10 719.27 23.58 289.3 0.0 0.0 23.58 25.5 0.0 25.53
40.0 40.2 0.0 0.0 40.2 79.80 705.04 753.03 23.99 289.4 0.0 0.0 23.99 24.6 0.0 24.56
41.0 39.6 0.0 0.0 39.6 78.68 736.09 784.85 24.38 289.5 0.0 0.0 24.38 23.6 0.0 23.59
42.0 39.1 0.0 0.0 39.1 77.56 765.42 814.78 24.681 289.6 0.0 0.0 24.68 22.6 0.0 22.62
43.0 38.5 0.0 0.0 38.5 76.45 793.06 842.98 24.961 289.6 0.0 0.0 24.96 21.6 0.0 21.64
44.01 37.9 0.0 0.0 37.9 75.33 819.06 869.51 25.231 289.7 0.0 0.0 25.23 20.7 0.0 20.67
45.0 37.4 0.0 0.0 37.4 74.21 843.43 894.38 25.471 289.7 0.0 0.0 25.47 19.7 0.0 19.701
46.0 36.8 0.0 0.0 36.8 73.09 866.23 917.64 25.711 289.8 0.0 0.0 25.71 18.7 0.0 18.731
47.0 36.3 0.0 0.0 36.3 71.97 887.47 939.32 25.92 289.8 0.0 0.0 25.921 17.8 0.0 17.76
48.0 35.7 0.0 0.0 35.7 70.85 907.19 959.44 26,12 289.9 0.0 0.0 26.121 16.8 0.0 16.78
49.0 35.1 0.0 0.0 35.1 69.73 925.42 978.04 26.31 289.91 0.0 0.0 26.31 15.8 0.0 15.81
_ 50.0 34.6 0.0 0.0 34.6 68.61 942.19 995.15 26.48 290.0 0.0 0.0 26,48 14.8 0.0 14.841
51.0 34.0 0.0 0.0 34.0 67.49 957.50 1010.81 26.65 290.0 0.0 0.0 26.65 13.9 0.0 13.8
52.0 33.5 0.0 0.0 33.5 66.37 970.29 1025.00 27.35 290.0 0.0 0.0 27.35 12.9 0.0 12.89
53.0 32.9 0.0 0.0 32.9 65.25 980.81 1036.67 27.93 290.1 0.0 0.0 27.93 11.9 0,0 11.92
54.0 32.3 0.0 0.0 32.3 64.14 989.28 1046.06 28.39 290.1 0.0 0.0 28.39 10.9 0.0 10.95
55.0 31.8 0.0 0.0 31,8 63.02 995.90 1053.41 28.76 290.1 0.0 0.0 28.76 10.0 0.0 9.98
56.0 31.2 0.0 0.0 31.2 61.90 1000.86 1058.92 29.03 290.1 0.0 0.0 29.03 9.0 0.0 9.01
57.0 30.7 0.0 0.0 30.7 60.78 1004.33 1062.76 29.22 290.1 0.0 0.0 29.22 8.0 0.0 8.03
58.0 30.1 0.0 0.0 30.1 59.66 1006.44 1065.10 29.33 290.1 0.0 0.0 29.33 1 7,1 0.0 7.06
59.0 29.5 0.0 0.0 29.5 58.54 1007.33 1066.10 29.38 290.1 0.0 0.0 29.38 1 6.1 0.0 6.09
60.0 29.0 0.0 0.0 29.0 57.42 1007,13 1065.87 29.37 290.1 0.0 0.0 29.37 1 5.1 0.0 5.12
61.0 28.4 0.0 0.0 28.4 56.30 1005.94 1064.55 29.31 290.1 0.0 0.0 29.31 4.1 0.0 4.14
62.0 27.9 0.0 0.0 27.9 55.18 1003.85 1062.24 29.19 290.1 0.0 0.0 29.19 3.2 0,0 3.17
63.0 27.3 0.0 0.0 27.3 54.06 1000.97 1059.04 29.03 290.1 0,0 0.0 29.03 2.2 0.0 2.20
64.0 26.8 0.0 0.0 26.8 26.75 997.36 1055.03 28.84 290.1 0.0 0.0 28.84 1.2 0.0 1.23
PEAK FLOWS
41 0 0 41 29 290.1 0 0 29 42 0 42
EXHIBIT"C-4"
PROPOSED DETENTION POND ROUTING
Duck Haven Phase 8
D.A.# IID_A.# 1D.A.# D.A.# Pond Routing EVENT= 10 1 D.A.# D.A.# 1 J_ D.A.# D.A.#
o. w 1 +� O
OI N Z d17 O J 0 m Z
07 + a •c a F
G C 7) + C > F-O = F n
a. 2 m 0 + ,4 Q o 0 , m 0 K 'x e O X
I a c c 0 .0 N N a a c c ,}-a m I c. F-W
Qp 47.8 0.01 0.0 I I 0.0 0.0 I 48.0 0.0
Tc 37.3 0.0 0.0 I 0.0 0.0 !, 21.8. 0.0 _
inc 1.0 2.0 1.011 1 I
Time cfs 1 cfs cfs cfs cfs cfs cfs ft cfs 1 cfs 1 cfs cfs cfs cfs
0.0 0.0 0.01 0.0 0.0 1.28 0.00 0.00 0.001 285.9 0.01 0.0 0.00 0.01 0.0 0.00
1.0 1.3 0.01 0.0 1.33.841 0.95 1.28 0.171 285.9 0.0 0.0 0.17 2.2' 0.0 2.21
2.0 2.6 0.01 0.0 2.6 6.411 3.541 4.79 0.62 286.0 0.0 0.01 0.62 1 4.4 0.0 4.41
3.01 3.8 0.01 0.01 3.8 8.97 7.361 9.95 1.30 286.2 0.0 0.0 1.301 6.61 0.0 6.62
4.0 5.1 0.01 0.0 5.1 11.53 12.081 16.33 2.131 286.4 0.0 0.0 2.13; 8.81_ 0.0 8.83
5.0 6.41 0.01 0.0 6.41 14.10 17.471 23.61 3.071 286.6 0.01 0.0 3.071 11.01 0.0 11.03
_ 6.01 7.7 0.01 0.01 7.7 16.661 23.35 31.56 4.111 286.8 0.0 0.0 4.11' 13.2! 0.0 13.24
7.01 9.0 0.0, 0.01 9.0 19.22 29.84 40.01 5.081 287.0 0.0 0.0 5.08 15.41 0.0 15.44
8.01 10.3 0.01 0.01 10.3 21.78 37.22 49.06 5.921 287.11 0.0 0.0. 1 5.92 17.7] 0.0 17.65
9.01 11.5 0.01 0.0 11.5 24.351 45.33 59.01 6.841 287.11 0.0 0.0 1 6.841 19.91 0.0 19.86
10.01 12.8 0.01 0.0 12.8r 26.91' 54.03 69.68 7.82' 287.21 0.01 0.0 7.821 22.11 0.0 22.06
11.01 14.1 0.01 0.0; 14.1 29.47: 63.22 80.94 8.86 287.3 0.01 0.0 8.861 24.3' 0.0 24.27
12.01 15.4 0.01 0.0! 15.41 32.031 72.79 92.69 9.951 287.4 0.0 0.0 9.951 26.5' 0.0 26.48
13.01 16.7 0.01 0.0 16.71 34.601 82.691 104.83 11.071 287.5 0.01 0.0 11.071 28.71 0.01 28.68
14.0 17.9 0.01 0.0 17.91 37.16 93.501 117.29 11.901 287.5 0.0 0.01 11.901 30.91 0.01 30.89
15.0 19.2 0.01 0.0 19.21 39.721 105.981 130.66 12.341. 287.6 0.0 0.0 12.34 1 33.11 0.0 33.09
16.0 20.5 0.0. 0.01 20.5 42.291 120.03] 145.70: 12.84 287.6 0.01 0.0 12.84 35.31 0.0 35.30
17.0] 21.8' 0.01 0.0 21.8 44.851 135.55_ 162.321 13.381 287.71 0.0 0.0 13.38 37.5[ 0.0 37.51
18.0 23.1 0.01 0.0 23.11 47.411 152.44 180.401 13.981 287.81 0.0 0.0' 13.98 i 39.7! 0.0 39.71
19.0 24.3 0.01 0.0 24.3 49.971 170.60 199.85 14.621. 287.91 0.0 0.0 14.62 I 41.91 0.0 41.92
20.0 25.6 0.01 0.01 25.6 52.541 189.961 220.58 15.311 287.9 0.01 0.0 1 15.311 44.11 0.0 44.13
21.01 26.9 0.0! 0.0 26.9 55.101 210.561 242.50 15.97!. 288.0 0.01 0.0 ] 15.97! 46.31 0.0 46.33
22.0 28.2 0.01 0.0 28.2 57.661 232.80 265.66 16.431 288.11 0.01 0.0 16.431 47.71 0.0 47.72
23.0 29.5 0.01 0.0 29.51 60.23 256.60 290.461 16.931 288.2: 0.0 0.0, 16.931 I 46.61 0.0 46.62
24.0 30.81 0.01 0.01 30.81 62.79 281.901 316.82 17.46' 288.21 0.0 0.0 17.46 45.51 0.0 45.52
25.0 32.01 0.01 0.0] 32.0 65.35, 308.64] 344.69 18.02 288.3] 0.01 0.0 , 18.02 44.4' 0.01 44.41
26.0 33.3 0.0 0.01 33.3 67.91 336.761 373.99 18.611 288.4: 0.01 0.0 1 18.61 43.31 0.01 43.31
27.0 34.61 0.0 0.01 34.6 70.48 366.261 404.68 19.211 288.51 0.0 0.0, 19.21, ' 42.21 0.0 42.21
28.0 35.91 0.0 0.01 35.9 73.04 397.351 436.741 19.701 288.61 0.0 0.0 19.70, 41.1 0.0 41.11
29.0 37.21 0.01 0.0' 1
37.2 75.60 429.971 470.391 20.211 288.7'1 0.0 0.0, 20.211 40.0 0.0 40.00
30.01 38.41 0. 01 0.01 38.4 78.171 464.081 505.57' 20.75 288.8 0.0 0.0 1 20.751 38.91 0.0 38.90
31.01 39.71 0.0 0.01 39.7 80.73. 499.63 542.24 21.31 288.9 0.01 0.0 1 21.311 i 37.81 0.0 37.80
32.01 41.01 0.0 0.01 41.0 83.291 536.59 580.36 21.89 289.01 0.01 0.0 21.891 36.71 0.01 36.69
33.01 42.31 0.0 0.01 42.3 85.85' 575.13 619.88 22.371 289.11 0.01 0.01 22.37, 35.61 0.01 35.59
34.0 43.6' 0.0 0.01 43.6 88.42 615.24 660.98 22.871 289.21 0.0 0.01 22.87, 34.51 0.01 34.49
35.0 44.8 0.0 0.01 44.8 90.98 656.87 703.65 23.39 289.3 0.0 0.0' 23.391 1 33.41 0.01 33.38
36.0 46.1 0.01 0.01 46.11 93.54' 699.99 747.851 23.93 289.4 0.0 0.01 23.931 1 32.3 0.01 32.20
37.01 47.4' 0.01 0.01 47.4 94.70 744.60 793.53 24.47 289.5 0.0 0.0 1 24.47 31.2 0.0 31.18
38.0' 47.3 0.01 0.01 47.3 93.94! 789.45 839.30, 24.921 289.61 0.01 0.0 24.92 30.1 0.0 30.07
39.01 46.6 0.01 0.01 46.6 92.661 832.66 883.39 25.361 289.71 0.0'1 0.0 25.361 29.0 0.0 28.97
40.01 46.0 0.01 0.01 46.0 91.371 873.75 925.32 25.781 289.81 0.01 0.01 25.78] 1 27.9 0.0 27.87
41.0 45.4, 0.01 0.01 45.41 90.091 912.77 965.13 26.181 289.91 0.0: 0.01 26.18 1 26.81 0.01 26.76
42.0 44.71 0.01 0.01 44.7' 88.81 949.75 1002.861 26.56'1 290.01 0.0 0.01 26.56 I 25.7 0.01 25.66
43.0 44.11 0.01 0.01 44.11 87.531 982.52! 1038.561 28.021 290.11 0.01 0.0; 28.02 24.6 0.011 24.56
44.01 43.41 0.01 0.01 43.41 86.25. 1010.89 1070.051 29.58 290.11 0.0 0.01 1 29.58 23.5 0.01 23.46
45.01 42.8 0.0j 0.01 42.8 84.971. 1035.31, 1097.14 30.92 290.21 0.0 0.01 I 30.92 22.4 0.01 22.35
46.0 42.2 0.01 0.0 42.2 83.691 1056.16 1120.28 32.06] 290.21 0.0, 0.01 I 32.06 1 21.21 0.0 21.25
47.0 41.5 0.01 0.0 41.5 82.411 1073.79 1139.84 33.03 290.31 0.01 0.0 ] 33.03 1 20.11 0.0 20.15
48.0 40.9 0.0, 0.0, 40.91 81.12 1088.53 1156.20 33.83 290.31 0.01 0.0 33.83 19.01 0.0 19.04
49.01 40.2 0.0! 0.0' 40.21 79.84, 1100.66 1169.65 34.501 290.31 0.0 0.01 34.50 17.91 0.0 17.94
50.01 39.6 0.01 0.0 39.61 78.561 1110.43_ 1180.50 35.031 290.31 0.0 0.0 35.031 16.81 0.0 16.84
51.01 39.0 0.01 0.01 39.0' 77.281 1118.08 1188.99 35.451 290.3, 0.0 0.0 35.451 15.71 0.0 15.73
52.01 38.31 0.01 0.01 38.3 76.001 1123.83 1195.361 35.77'1 290.4! 0.0 0.0 35.771 14.61 0.0 14.63
53.0 37.71 0.01 0.0 37.71 74.72 1127.85 1199.821 35.991 290.41 0.0 0.0 35.99'1 13.51 0.0 13.53
54.0 37.01 0.0 0.0 37.01 73.441 1130.31 1202.561 36.12' 290.4'1 0.0 0.0 36.12, 1 12.4' 0.0[ 12.42
55.0 36.41 0.0 0.0 36.4 72.15 1131.38 1203.75 36.18, 290.410.0 0.0 36.18 11.3' 0.0 11.32
_ 56.0 35.8 0.01 0.0 35.81 70.8711 1131.19 1203.54 36.17, 290.4, 0.0 0.0 36.17 10.2; 0.0 10.22
57.01 35.1 0.01 0.01 35.1] 69.59!, 1129.86 1202.06 36.10, 290.41 0.0 0.0 1 36.10 9.1 0.0 9.11
58.0 34.5 0.01 0.01 34.5' 68.311 1127.51 1199.46 35.971 290.41 0.0 0.0 1 35.97 8.0 0.0 8.01
59.0 33.8 0.01 0.01 33.8 67.031 1124.24 1195.82 35.79 290.41 0.0 0.0 35.79 6.9 0.0 6.91
60.0 33.2 0.0 0.01 33.2 65.75] 1120.14 1191.271 35.57 290.41 0.0 0.01 35.571 5.8 0.0 5.81
61.0 32.6 0.0 0.0 32.6 64.47 1115.28 1185.881 35.30 290.31 0.0 0.0 35.301 4.7, 0.0 4.70
62.0 31.9 0.0 0.0 31.9 63.181 1109.75 1179.751 35.00 290.3 0.0 0.0 35.00 3.6 0.0 3.60
63.01 31.3 0.01 0.01 31.3 61.90' 1103.621 1172.94] 34.661 290.3 0.0 0.0 34.661 2.5 0.0 2.50
64.01 30.6 0.0, 0.01; 30.6 30.631 1096.931 1165.521 34.291 290.3 0.0 0.0 34.291 1.4 0.01 1.39
1
I 1
PEAK FLOWS 1 I I 1
I 47 I 0 0 47 I 36 I 290.4 0 10 1 36 I 1 48 1 0 I 48
EXHIBIT"C-4"
PROPOSED DETENTION POND ROUTING
Duck Haven Phase 8
D.A.# D.A.# D.A.# D.A.# [Pond Rou ing EVENT= I 25 D.A.# J.A.# D.A.# 1 D.A.#
* c
L 0 0 0
a w c + N O
of a Z O a o JO m JZ
>, 2 m m O + y en o S m m o ct is o O X
x d C c 0 C N N a d W c C H d m C F-W
Qp 55.0 0.0 0.0 0.0 0.0 55.1 0.0
Tc 37.3 0.0 0.0 0.0 0.0 21.8 0.0
inc 1.0 2.0 1.0
Time cfs cfs cfs cfs cfs _ cfs cfs ft cfs cfs cfs cfs cfs cfs
0.0 0.0 0.0 0.0 0.0 1.48 0.00 0.00 0.00 285.9 0.0 0.0 0.00 0.0 0.0 0.00
1.0 1.5 0.0 0.0 1.5 4.43 1.09 1.48 0.19 285.9 0.0 0.0 0.19 2.5 0.0 2.53
2.0 3.0 0.0 0.0 3.0 7.38 4.08 5.52 0.72 286.1 0.0 0.0 0.72 5.1 0.0 5.06
3.0 4.4 0.0 0.0 4.4 10.33 8.48 11.46 1.49 286.2 0.0 0.0 1.49 7.6 0.0 7.59
4.0 5.9 0.0 0.0 5.9 13.28 13.91 18.811 2.45 286.5 0.0 0.0 2.45 10.1 0.0 10.12
5.0 7.4 0.0 0.0 7.4 16.23 20.11 27.19 3.54 286.7 0.0 0.0 3.54 12.7 0.0 12.65
6.0 8.9 0.0 0.0 8.9 19.18 26.89 36.34 4.73 287.0 0.0 0.0 4.73 15.2 0.0 15.19
7.0 10.3 0.0 0.0 10.3 22.13 34.78 46.07 5.64 287.1 0.0 0.01 5.64 17.7 0.0 17.72
8.01 11.8 0.0 0.0 11.8 25.08 43.62 56.91 6.64 287.1 0.0 0.0 6.64 20.2 0.0 20.25
9.0 13.3 0.0 0.0 13.3 28.03 53.24 68.71 7.73, 287.2 0.0 0.0 7.73 22.8 0.0 22.78
10.0 14.8 0.0 0.0 14.8 30.98 63.49 81.27 8.89 287.3 0.0 0.0 8.89 25.3 0.0 25.31
11.0 16.2 0.0 0.0 16.2 33.94 74.25 94.47 10.11 287.4 0.0 0.0 10.11 27.8 0.0 27.84
12.0 17.7 0.0 0.0 17.7 36.89 85.43 108.18 11.38 287.5 0.0 0.0 11.38 30.4 0.0 30.37
13.0 19.2 0.0 0.0 19.2 39.84 98.19 122.31 12.06 287.5 0.0 0.0 12.06 32.9 0.0 32.90
14.0 20.7 0.0 0.0 20.7 42.79 112.86 138.03 12.58 287.6 0.0 0.0 12.58 35.4 0.0 35.43
15.0 22.1 0.0 0.0 22.1 45.74 129.32 155.65 13.16 287.7 0.0 0.0 13.16 38.0 0.0 37.96
16.0 23.6 0.0 0.0 23.6 48.69 147.45 175.06 13.80 287.8 0.0 0.0 13.80 40.5 0.0 40.50
17.0 25.1 0.0 0.0 25.1 51.64 167.14 196.14 14.50 287.8 0.0 0.0 1 14.50 43.0 0.0 43.03
18.0 26.6 0.0 0.0 26.6 54.59 188.28 218.78 15.25 287.9 0.0 0.0 15.25 45.6 0.0 45.56
19.0 28.0 0.0 0.0 28.0 57.54 210.93 242.88 15.97 288.0 0.0 0.0 15.971 48.1 0.0 48.09
20.0 29.5 0.0 0.0 29.5 60.49 235.49 268.47 16.49 288.1 0.0 0.0 16.49 50.6 0.0 50.62
21.0 31.0 0.0 0.0 31.0 63.44 261.90 295.99 17.04 288.2 0.0 0.0 17.04 53.1 0.0 53.15
22.0 32.5 0.0 0.0 32.5 66.40 290.08 325.34 17.63 288.3 0.0 0.0 17.63 54.7 0.0 54.75
23.0 33.9 0.0 0.0 33.9 69.35 319.95 356.47 18.261 288.4 0.0 0.0 18.26 53.5 0.0 53.48
24.0 35.4 0.0 0.0 35.4 72.30 351.45 389.30 18.921 288.5 0.0 0.0 18.92 52.2 0.0 52.22
25.0 36.9 0.0 0.0 36.9 75.25 384.76_ 423.75 19.501 288.6 0.0 0.0 19.50 51.0 0.0 50.95
26.0 38.4 0.0 0.0 38.4 78.20 419.90 460.00 20.051 288.7 0.0 0.0 20.05 49.7 0.0 49.69
27.0 39.8 0.0 0.0 39.8 81.15 456.84_ 498.10 20.631 288.81 0.0 0.0 I 20.63 48.4 0.0 48.42
28.0 41.3 0.0 0.0 41.3 84.10 495.51 537.99 21.24 288.91 0.0 0.0 21.241 47.2 0.0 47.15
29.0 42.8 0.0 0.0 42.8 87.051 535.86 579.61 21.88 289.0' 0.0 0.0 21.88 45.9 0.01 45.89
30.0 44.3 0.0 0.0 44.3 90.001 578.09 622.91 22.41 289.1 0.0 0.0 22.41 44.6, 0.01 44.62
31.0 45.7 0.0 0.0 45.7 92.95 622.17 668.09 22.96 289.2 0.0 0.0 I 22.96 43.4. 0.01 43.36
32.0 47.2 0.0 0.0 47.2 95.91 668.07 715.13 23.531 289.3 0.01 0.0 23.53 42.1 0.01 42.09
33.0 48.7 0.0 0.0 48.7 98.86 715.72 763.97 24.12 289.4 0.0' 0.0 24.12 40.8 0.0 40.83
34.0 50.2 0.0 0.0 50.2 101.811 765.23 814.58 24.68 289.6 0.0 0.0 24.68 39.6 0.0 39.56
35.0 51.6 0.0 0.0 51.6 104.76 816.63 867.03 25.20 289.7 0.0 0.0 25.20 38.3 0.0 38.30
36.0 53.11 0.0 0.0 53.1 107.71 869.90 921.39 25.74 289.8 0.0 0.0 25.7437.0 0.0 37.03
37.0 54.6 0.0 0.0 54.6 109.04 925.00 977.61 26.31, 289.9 0.0 0.0 26.31 35.8 0.0 35.77
38.0 54.5 0.0 0.0 54.5 108.16 978.45 1034.04 27.80 290.0 0.0 0.0 27.80 34.5 0.0 34.50
39.0 53.7 0.0 0.0 53.7 106.69 1025.82 1086.61 30.40 290.1 0.0 0.0 30.40 33.2 0.0 33.23
40.0 53.0 0.0 0.0 53.0 105.21 1067.18 1132.51 32.66 290.2 0.0 0.0 32.66 32.01 0.0 31.97
41.0 52.2 0.0 0.0 52.2 103.74 1103.13 1172.39 34.63 290.3 0.0 0.0 34.63 30.71 0.0 30.70
42.0 51.5 0.0 0.0 51.5 102.26 1134.19 1206.86 36.34 290.4 0.0 0.0 36.34 29.41 0.0 29.44
43.0 50.8 0.01 0.0 50.8 100.79 1160.86 1236.45 37.80 290.4 0.01 0.0 37.80 28.2 0.0 28.17
44.0 50.0 0.0 0.0 50.0 99.31 1183.56 1261.64 39.04 290.5 0.01 0.0 39.04 26.9 0,01 26.91
45.0 49.3_ 0.0 0.0 49.3 97.84 1201.89 1282.87 40.49 290.5 0.0' 0.0 40.49 I 25.6 0.01 25.64
46.0 48.5 0.0 0.0 48.5 96.36 1216.24 1299.73 41.74 290.6 0.0 0.0 41.74 24.4 0.0 24.38
47.0 47.8 0.0 0.0 47.8 94.89 1227.21 1312.61 42.70 290.6 0.0 0.0 42.70 23.1 0.0 23.11
48.0 47.1 0.0 0.0 47.1 93.41 1235.28 1322.09 43.40 290.6 0.0 0.0 43.40 21.8 0.0 21.81.
49.0 46.3 0.0 0.0 46.3 91.93 1240.90 1328,69 43.901 290.6 0.0 0.0 1 43.90 20.6 0.0 20.581
50.0 45.6 0.0 0.0 45.6 90.46 1244.43 1332.84 44.201 290.6 0.0 0.0 44.20 19.3 0.0 19.31
51.0 44.9 0.0 0.0 44.9 88.98 1246.17 1334.89 44.36 290.6 0.0 0.0 i 44.361 18.0 0.0 18.05
52.0 44.1 0.0 0.0 44.1 87.51 1246.41 1335.16 44.38 290.6 0.0 0.0 44.381 16.8 0.0 16.78
53.0 43.4 0.0 0.0 43.4 86.03 1245.35 1333.91 44.28 290.6 0.0 0.0 44.28 15.5 0.0 15.52
54.0 42.6 0.0 0.0 42.6 84.56 1243.19 1331.38 44.10 290.6 0,0 0.0 44.10 14.3 0.0 14.25
55.0 41.9 0.0 0.0 41.9 83.08 1240.09 1327.74 43.83 290.6 0.0 0.0 43.83 13.0 0.0 12.99
56.0 41.2 0.0 0.0 41.2 81.61 1236.21 1323.18 43.49 290.6 0.0 0.0 43.49 11.7 0.0 11.72
57.0 40.4 0.0 0.0 40.4 80.13 1231.64 1317.81 43.09 290.6 0.0 0.0 43.09 10.5 0.0 10,46
58.0 39.7 0.0 0.0 39.7 78.66 1226.49 1311.77 42.64, 290.6 0.0 0.0 42.64 9.2 0.0 9.19
59.0 39.0 0.0 0.0 39.0 77.18 1220.86 1305.15 42.15! 290.6 0.0 0.0 42.15 7.9 0.0 7.93
60.0 38.2 0.0 0.0 38.2 75.70 1214.81 1298.04 41.62 290.6 0.0 0.0 41.62 6.7 0.0 6.66
61.0 37.5 0.0 0.0 37.5 74.23 1208.40 1290.51 41.06 290.5 0.0 0.0 41.06 5.4 0.0 5.39
62.0 36.7 0.0 0.0 36.7 72.75 1201.69 1282.63 40.47 290.5 0.0 0.0 40.47 4.1 0.0 4.13
63.0 36.0 0.0 0.0 36.0 71.28 1194.72 1274.44 39.86 290.5 0.0 0.0 39.86 2.9 0.0 2.86
64.0 35.3 0.0 0.0 35.3 35.27 1187.48 1266.00 39.26 290.5 0.0 0.0 39.26 1.6 0.0 1.60
PEAK FLOWS
55 0 0 55 I 44 290.6 0 0 44 55 0 55
EXHIBIT"C-4"
PROPOSED DETENTION POND ROUTING
Duck Haven Phase 8
D.A.# D.A.# D.A.# D.A.# Pond Routing EVENT= 50 I D.A.# J.A.# 1 D.A.# D.A.#
x a
n 0 O 0
-- ' o z w Z a 01m OO aa~0 oa + +) > F O r n
2 m m O u) uo 0 m m O cC m m O X
I a. c c 0 5
a CA a aui c c ra m c FW
Qp 62.7 0.0 0.0 0.0 0.0 62.5 0.0
Tc 37.3 0.0 0.0 0.0 0.0 21.8 0.0
inc 1.0 2.0 1.0
Time cfs cfs cfs cfs cfs cfs cfs ft cfs cfs cfs cfs cfs cfs
0.0 0.0 0.0 0.0 0.0 1.68 0.00 0.00 0.00 285.9 0.0 0.0 0.00 0.0 0.0 0.00
1.0 1.7 0.0 0.0 1.7 5.04 1.24 1.68 0.22 286.0 0.0 0.0 0.22 2.91 0.0 2.87
2.0 3.4 0.0 0.0 3.4 8.41 4.65 6.29 0.82 286.1 0.0 0.0 0.82 5.71 0.0 5.75
3.0 5.0 0.0 0.0 5.0 11.771 9.66 13.06 1.70 286,3 0.0 0.0 1.70 8.6 0.0 8.62
4.0 6.7 0.0 0.0 6.7 15.131 15.85 21.43 2.79 286.5 0.0 0.0 2.79 11.5 0.0 11.49
5.0 8.4 0.0 0.0 8.4 18.501 22.92 30.99 4.03' 286.8 0.0 0.0 4.03 14.4 0.0 14.37
6.0 10.1 0.0 0.0 10.1 21.861 30.99 41.42 5.21 287.0 0.0 0.0 5.21 17.2 0.0 17.24
7.0 11.8 0.0 0.0 11.8 25.22 40.31 52.85 6.27 287.1 0.0 0.0 6.27 20.1 0.0 20.12
8.0 13.5 0.0 0.0 13.5 28.59 50.66 65.54 7.44 287.2 0.0 0.0 7.44 23.0 0.0 22.99
9.0 15.1 0.0 0.0 15.1 31.95 61.83 79.24 8.71 287.3 0.0 0.0 8.71 25.9 0.0 25.86
10.0 16.8 0.0 0.0 16.8 35.31 73.68 93.78 10.05 287.4 0.0 0.0 10.05 28.7 0.0 28.74
11.0 18.5 0.0 0.0 18.5 38.68 86.09 109.00 11.45 287.5 0.0 0.0 11.45 31.6 0.0 31.61
12.0 20.2 0.0 0.0 20.2 42.04 100.48 124.76 12.14 287.6 0.0 0.0 12.14 34.5 0.0 34.48
13.0 21.9 0.0 0.0 21.9 45.40 117.06 142.52 12.73 287.6 0.0 0.0 12.73 37.4 0.0 37.36
14.0 23.5 0.0 0.0 23.5 48.76 135.68 162.46 13.39 287.7 0.0 0.0 13.39 40.2 0.0 40.23
15.0 25.2 0.0 0.0 25.2 52.13 156.22 184.45 14.11 287.8 0.0 0.0 1 14.11 43.1 0.0 43.11
16.0 26.9 0.0 0.0 26.9 55.49 178.541 208.34 14.90 287.9 0.01 0.0 14.90 46.0 0.0 45.98
17.0 28.6 0.01 0.0 28.6 58.85 202.52 234.03 15.75 288.0 0.0 0.0 15.75 48.9 0.0 48.85
18.0 30.3 0.0 0.01 30.3 62.221 228.68 261.38 16.35 288.1 0.0 0.0 16.35 51.7 0.0 51.73
19.0 31.9 0.0 0.0 31.9 65.58 257.02 290.90 16.941 288.2 0.0 0.0 16.94 54.6 0.01 54.60
20.0 33.6 0.0 0.0 33.6 68.94 287.44 322.60 17.58 288.3 0.0 0.0 17.58 57.5 0.0 57.47
21.0 35.3 0.0 0.0 35.3 72.31 319.87 356.39 18.26 288.4 0.0 0.0 18.26 60.3 0.0 60.35
22.0 37.0 0.0 0.0 37.0 75.67 354.22 392.17 18.98 288.5 0.0 0.0 18.9862.21 0.0 62.16
23.0 38.7 0.0 0.0 38.7 79.03 390.70 429.89 19.59 288.6 0.0 0.0 19.59 I 60.7 0.0 60.73
24.0 40.4 0.0 0.0 40.4 82.40 429.34 469.73 20.20 288.7 0.01 0.0 20.20 59.3 0.0 59.29
25.0 42.0 0.0 0.0 42.0 85.761 470.05 511.73 20.841 288.8 0.0 0.0 20.84 57.9 0.0 57.85
26.0 43.7 0.0 0.0 43.7 89.121 512.79 555.81 21.51, 288.9 0.0 0.0 ' 21.51 56.4 0.0 56.42
27.0 45.41 0.0 0.0 45.4 92.491 557.60 601.911 22.16i 289.0 0.0 0.0 22.16 55.01 0.0 54.98
28.0 47.1 0.0 0.0 47.1 95.851 604.60 650.08 22.74 289.2 0.0 0.0 22.74 53.5 0.01 53.54
29.0 48.8 0.0 0.0 48.8 99.21'
653.74 700.45 23.35 289.3 0.0 0.0 23.35 52.1 0.01 52.10
30.0 50.4 0.0 0.0 50.4 102.57 704.98 752.96 23.99 289.4 0.0 0.0 23.99 50.7 0.0 50.67
31.0 52.1 0.0 0.0 52.1 105.94 758.34 807.55 24.61 289.5 0.0 0.0 24.61 ! 49.2 0.0 49.23
32.0 53.8, 0.0 0.0 53.8 109.30 813.93 864.27 25.17 289.7 0.0 0.0 1 25.17 47.8 0.0 47.79
33.0 55.5 0.0 0.01 55.5 112.66 871.70 923.23 25.76 289.8! 0.0 0.0 25.761 46.4 0.0 46.36
34.0 57.2 0.0 0.0 57.2 116.03 931.62 984.37 26.37, 289.9 0.0 0.0 26.37 44.9 0.0 44.92
35.0 58.9 0.0 0.0 58.9 119.39 990.71 1047.651 28.47 290.1 0.0 0.0 28.47 1 43.51 0.0 43.48
36.0 60.5 0.0 0.0 60.5 122.75 1046.99 1110.10] 31.56 290.2 0.0 0.0 1 31.56 42.01 0.0 42.05
37.0 62.2 0.0 0.0 62.2 124.27 1100.73 1169.74' 34.501 290.3 0.0 0.0 34.50 40.61 0.0 40.61
38.0 62.11 0.0 0.0 62.1 123.27 1150.54 1225.01 37.23 290.4 0.0 0.0 37.23 39.21 0.0' 39.17
39.0 61.2 0.0 0.0 61.2 121.59 1194.18 1273.81 39.81 290.5 0,0, 0.0 39.81 37.7 0.0 37.74,
40.0 60.4' 0.0 0.0 60.4 119.91 1229.90 1315.77 42.94 290.6 0.0 0.0 42.94 36,3 0.0 36.30
41.0 59.5 0.0 0.0 59.5 118.23 1258.88 1349.81 45.47 290.6 0.0 0.0 45.47 34.9 0.0 34.88
42.0 58.7 0.0 0.0 58.7 116.55 1282.12 1377.11 47.50 290.7 0.0 0.0 47.50 33.4 0.0 33.43
43.0 57.9 0.0 0.0 57.9 114.86 1300.47 1398.66 49.10 290.7 0.0 0.0 49.10 32.0' 0.0 31.981
44.0 57.0 0.0 0.0' 57.0 113.18 1314.66 1415.33 50.34 290.8 0.0 0.0 50.34 30.6 0.0 30.55
45.0 56.2'. 0.0 0.0 56.2 111.50 1325.30 1427.841 51.27 290.81 0.0 0.0 51.27 29.1 0.0 29.11
46.0 55.3' 0.0 0.0 55.3 109.82 1332.94 1436.80 51.93 290.81 0.0 0.0 51.931 I 27.7 0.0 27.68
47.0 54.5 0.0 0.0 54.5 108.14 1338.00 1442.76 52.38 290.81 0.0 0.0 : 52.38 1 26.2 0.0 26.24
48.0 53.6 0.0 0.0 53.6 106.461 1340.88 1446.141 52.63 290.8 0.0 0.0 52.63 24.8 0.0 24.88
49.0 52.8 0.0 0.0 52.8 104.781 1341.90 1447.34 52.72 290.8 0.0 0.0 52.72 23.4 0.0 23,37
50,0 52.0 0.0 0.0 52.0 103.09 1341.34 1446.68 52.67 290.8 0.0 0.0 52.67 21.9, 0.0 21.93
51.0 51.1 0.0 0.0 51.1 101.41 1339.43 1444.44 52.50 290.8 0.0 0.0 52.50 20.5 0.0 20.49
52.0 50.3 0.0 0.0 50.3 99.73 1336.37 1440.84 52.231 290.8 0.0 0.0 52.231 19.1, 0.0 19.06
53.0 49.4 0.0 0.0 49.4 98.05 1332.34 1436.10 51.881 290.8 0.0 0.0 51.88 17.61 0.0 17.62
54.0 48.6 0.0 0.0 48.6 96.37 1327.47 1430.39 51.46 290.8 0.0 0.0 51.46 16.21 0.0 16.10
55.0 47.8 0.0 0.0 47.8 94.69 1321.90 1423.84 50.97 290.8 0.0 0,0 50.97 _ 14.71 0.0 14.75
56.0 46.9 0,0 0.0 46.9 93.00 1315.72 1416.59 50.43 290.8 0.0 0.0 50.4313.31 0.0 13.31
57.0 46.1 0.0 0.0 46.1 91.32 1309.03 1408.73 49.851 290.7 0.0 0.0 49.85 11.9 0.0 11.87
58.0 45.2 0.0 0.0 45.2 89.64, 1301.91 1400.36 49.22 290.7 0.0 0.0 49.22 10.41 0.0 10.44
59.0 44.4 0.0 0.0 44.4 87.96; 1294.41 1391.55 48.57 290.7 0.0 0.0 48.57 9.01 0.0 9.00
60.0 43.6 0.0 0.0 43.6 86.281 1286.60 1382.37 47.89 290.7 0.0 0.0 47.89 7.6 0.0 7.56
61.0 42.7 0.0 0.0 42.7 84.601 1278.51 1372.88 47.18 290.7 0.0 0.0 47.18 6.1 0.0 6.12
62.0 41.9 0.0 0.0 41.9 82.921 1270.20 1363.11 46.45 290.7 0.0 0.0 46.45 ! 4.7 0.0 4.69
63.0 41.0 0.0 0.0 41.0 81.231 1261,69 1353.12 45.71 290.7 0.0 0.0 45.71 3.3 0.0 3.25
64.0 40.21 0.0 0.0 40.2 40.201 1253.02 1342.93 44.95 290.6 0.0 0.0 44.95 1.8 0.0 1.81
1
PEAK FLOWS i I I
62 0 0 I 62 i 53 290.8 0 0 53 I 62 I 0 62
EXHIBIT"C-4"
PROPOSED DETENTION POND ROUTING
Duck Haven Phase 8
D.A.# D.A.4 D.A.# D.A.4 Pond Rou ing EVENT= 100 1 D.A.# IP.A.• D.A.# D.A.#
* c
rI
a w 0 w C7
m
c N
Of N Z 0 O J O C Jon ?
H
6 9 C C > F-0 m H
> C m m 0 u) v) o 8 m to 0 0: 'x m 0 X
.. I C C C 0 (V N O. O.W C C H 6. m C F-W
fip 71.2 0.0 0.0 0.0 0.0 70.7 0.0 __
ffil 37.3 0.0 0.0 --- 0.0 0.011 21.8 0.0
'nc 1.0 2.0 1.0 1
Time cfs cfs cfs cfs cfs cfs cfs ft cfs cfs cfs cfs cfs cfs
0.0 0.0 0.0 0.0 0.0 1.91 0.00 0.00 0.00 285.9 0.0 0.0 0.00 0.0 0.0 0.01
1.0 1.9 0.0 0.0 1.9 5.731 1.41 1.91 0.25 286.0 0.0 0.0 0.25 3.21 0.0 3.2
2.0 3.8 0.0 0.0 3.8 9.55 5.28 7.14 0.93 286.1 0.0 0.0 0.93 6.5 0.0 6.51
3.0 5.7 0.0 0.0 5.7 13.37 10.97 14.84 1.931 286.3 0.0 0.0111 1.93- 9.7 0.0 9.7.
4.0 7.6 0.0 0.0 7.6 17.19 18.01 24.35 3.171 286.6 0.0 0.0 3.17 13.0 0.0 12.9•
5.0 9.6 0.0 0.0 9.6 21.01 26.04 35.20 4.581 287.0 0.0 0.0 4.58 16.2 0.0 16.2
6.0 11.5 0.0 0.0 11.5 24.83 35.58 47.05 5.731 287.1 0.0 0.0 5.73 19.5 0.0 19.4•
7.0 13.4 0.0 0.0 13.4 28.65 46.48 60.42 6.97 287.2 0.0 0.0 6.97 22.7 0.0 22.7•
8.0 15.3 0.0 0.0 15.3 32.47 58.48 75.13 8.33 287.3 0.0 0.0 8.33 26.0 0.0 25.9•
9.0 17.2 0.0 0.0 17.2 36.29 71.38 90.95 9.79 287.4 0.0 0.0 9.79 29.2 0.0 29.2
10.0 19.1 0.0 0.0 19.1 40.11 85.01 107.67 11.33 287.5 0.0 0.0 11.33 32.5 0.0 32.4:
11.0 21.0 0.0 0.0 21.0 43.93 100.81 125.12 12.161 287.6 0.0 0.0 12.16 35.7 0.0 35.7•
12.0 22.9 0.0 0.0 22.9 47.75 119.14 144.74 12.80 287.6 0.0 0.0 12.8039.0 0.0
13.0 24.8 0.0 0.01 24.8 51.57 139.82 166.89 13.53 287.7 0.0 0.0 13.53 42.2 0.0
14.0 26.7 0.0 0.0 26.7 55.39 162.71 191.39 14.34 287.8 0.0 0.0 14.34 45.5 0.0 45.4:
15.0 28.7 0.0 0.0 28.7 59.21 187.65 218.10 15.23 287.9 0.0 0.0 15.23 48.7 0.0 48.7.
16.0 30.6 0.0 0.0 30.6 63.031 214.75 246.86 16.05 288.0 0.0 0.0 16.05 52.0 0.0 51.9
17.0 32.5 0.0 0.0 32.5 66.861 244.43 277.79 16.68 288.1 0.0 0.0 16.68 55.2 0.0 55.2.
18.0 34.4 0.0 0.0 34.4 70.68 276.59 311.29 17.35 288.2 0.0 0.0 17.35 58.5 0.0 58.4
19.0 36.3' 0.0 0.0 36.3 74.50 311.11 347.26 18.08 288.3 0.0 0.0 18.08 61.71 0.0 61.7.
20.0 38.2 0.0 0.0 38.2 78.32 347.91 385.61 18.85 288.5 0.0 0.0111 18.85- 65.0 0.0 64.9:
21.0 40.1 0.0 0.0 40.1 82.14 387.16 426.23 19.54 288.6 0.0 0.0 19.54 68.21 0.0 68.21
22.0 42.0 0.0 0.0 42.0 85.96 428.91 469.29 20.19 288.7 0.0 0.0 20.19 70.3 0.0 70.2.
23.0 43.9 0.0 0.0 43.9 89.78 473.09 514.86 20.89 288.8 0.0 0.0 20.891 68.6 0.0 68.6-
24.0 45.8 0.0 0.0 45.8 93.60 519.62 562.86 21.62 288.9 0.0 0.0 21.62 67.0 0.0 67.01
25.0 47.8 0.0 0.0 47.8 97.42 568.64 613.22 22.29 289.1 0.0 0.0 22.29■ 65.4 0.0 65.3•
26.0 49.7 0.0 0.0 49.7 101.24 620.18 666.05 22.93 289.2 0.0 0.0 22.93 63.8 0.0 63.7
27.0 51.6 0.0 0.0 51.6 105.06 674.21 721.42 23.61 289.3 0.0 0.0 23.61 62.1 0.0 62.1•
28.0 53.5 0.0 0.0 53.5 108.88 730.65 779.27 24.31 289.5 0.01 0.0 24.31 60.5 0.0 60.5.
29.0 55.4 0.0 0.0 55.4 112.70 789.67 839.52 24.93 289.6 0.0 0.0 24.93 58.9 0.0 58.8•
30.0 57.31 0.0 0.0 57.3 116.52 851.26 902.37 25.55 289.8 0.0 0.0 25.55 57.3 0.0 57.2
31.0 59.2 0.0 0.0 59.2 120.34 915.37 967.78 26.211 289.9 0.01 0.0 26.21 55.6 0.0 55.6'
32.0 61.1 0.0 0.0 61.1 124.16 979.95 1035.71 27.881 290.0 0.0 0.0 1 27.88 54.0 0.0 54.0.
33.0 63.0 0.0 0.0 63.0 127.98 1041,58 1104.10 31.261 290.2 0.0 0.0 1 31.26 52.4 0.0 52.48
34.0 64.9 0.0 0.0 64.9 131.80 1100.581 1169.56 34.49 290.3 0.0 0.0 i 34.49 1 50.8 0.0 50.7
35.0 66.9 0.0 0.0 66.9 135.62 1157.181 1232.38 37.60 290.4 0.0 0.0 37.60 0.0M
36.0 68.8 0.0 0.0 68.8 139.44 1210.35 1292.80 41.23 290.5 0.0 0.0 1 41.23 0.0
37.0 70.7 0.0 0.0 70.7 141.17 1258.86 1349.79 45.46 290.6 0.0 0.0 45.46 0.0 45.90
38.0 70.5 0.0 0.0 70.5 140.03 1301.63 1400.03 49.20 290.7 0.0 0.0• 49.20- 44.3 0.0
39.0 69.5 0.0 0.0 69.5 138.12 1337.07 1441.66 52.30 290.8 0.0 0.0 52.30 42.7 0.0 42.6-
40.0 68.6 0.0 0.0 68.6 136.21 1365.61 1475.191 54.79 290.9 0.0 0.0 54.79 41.0 0.0 41.0•
41.0 67.6 0.0 0.0 67.6 134.30 1388.28 1501.82 56.77 290.9 0.0 0.0 56.77 39.4 0.0 39.41
42.0 66.7 0.0 0.0 66.7 132.39 1405.96 1522.58 58.31 290.9 0.0 0.0 58.31 37.8 0.0 37.7:
43.0 65.7 0.0 0.0 65.7 130.48 1419.38 1538.35 59.49 291.0 0.0 0.0 59.49 36.2 0.0 36.1:
44.0 64.8 0.0 0.0 64.8 128.57 1429.17 1549.86 60.34 291.0 0.01 0.0 60.34 34.5 0.0 34.5•
45.0 63.8' 0.0 0.0 63.8 126.66 1430.78 1557.74 63.48 291.0 0.01 0.0 63.48 32.9 0.0 32.91
46.0 62.9 0.0 0.0 62.9 124.75 1430.91 1557.44 63.26 291.0 0.0 0.0 63.26 31.3 0.0 31.2:
47.0 61.9 0.0 0.01 61.9 122.84 1431.66 1555.66 62.00 291.0 0.0 0.0 62.00 29.7 0.0 29.6:
48.0 60.9 0.0 0.0 60.9 120.93 1432.15 1554.50 61.171 291.0 0.0 0.0 61.17 28.0 0.0 28.0
49.0 60.0 0.0 0.0 60.0 119.02 1431.92 1553.08 60.581 291.0 0.0 0.0 I 60.58 1 26.4 0.0 26.41
50.0 59.0 0.0 0.0 59.0 117.11 1430.09 1550.94 60.421 291.0 0.0 0.0 60.42 24.8 0.0 24.7•
51.0 58.1 0.0 0.0 58.1 115.20 1426.92 1547.20 60.14 291.0 0.0 0 O 60.14 0.0EE
52.0 57.1 0.0 0.0 57.1 113.29 1422.581 1542.11 59.77 291.0 0.0 0.0 59.77 0.0
53.0 56.2 0.0 0.0 56.2 111.38 1417.271 1535.87 59.30 291.0 0.0 0.0M 59.30- 19.9 0.0 19.9.
1 1528.65 58 76 291.0 00 0.0
55.0 54.3 0.0 0.0 54.3 107 56 1404.26 1520.59 58.16 290.9 0.0 0.0, •
� -� 0.0 16.6
56.0 53.3 0.0 0.0 53.3 105.65' 1396.79 1511.82 57.51 290.9 0.0 0.0M 57.51 15.0 0.01 15.0•
57.0 52.3 0.0 0.0 52.3 103.74 1388.81 1502.44 56.82 290.9 0.0 0.0111 56.82 13.4 0.0 13.4.
58.0 51.4 0.0 0.0 51.4 101.831 1380.39 1492.55 56.08 290.9 0.0 0.0 56.08 11.8 0.01 11.8'
59.0 50.4 0.0 0.0 50.4 99.921 1371.59 1482.22 55.31 290.91 0.0 0.0 55.31 10.2 0.0 10.1
60.0 49.5 0.0 0.0 49.5 98.011 1362.48 1471.51 54.52 290.91 0.0 0.0 54.52 8.5 0.0 8.5
61.0 48.5 0.0 0.0 48.5 96.101 1353.10 1460.49 53.70 290.81 0.0 0.0M 53.70 6.9 0.0 6.9.
62.0 47.6 0.0 0.0 47.6 94.19' 1343.48 1449.19 52.86 290.81 0.0 0.0 52.86 1 5.3 0.01 5.31
63.0 46.6 0.0 0.0 46.6 92.28 1333.67 1437.67 52.00 290.81 0.0 0.0, 52.001 3.7 0.0' 3.6
64.0 45.7 0.0 0.0 45.7 45,66 1323.691 1425.95 51.13 290.8 0.0 0.01 51.13 2.1 0.01 2.0
1 1 1 1
PEAK FL•WS
71 1 0 0 71 i 63 291.0 0 0 63 i 70 1 0 70
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