HomeMy WebLinkAboutWater and Sewer System ReportWater and Sewer System Report
for
Castlegate Subdivision, Phase 7
College Station, Texas
July 2006
Prepared By:
Civil Development, Ltd.
2900 Longmire Drive, Suite K
College Station, Texas 77845
(979) 764-7743
General Information
Location:
General Note:
Land Use:
Design Criteria
Castlegate Subdivision, Phase 7 is located immediately south of Phase 8 and west of
Phase 6 in southern College Station.
Phase 7 contains 30 platted lots, but there are an additional 17 lots in a future phase
adjacent to it that will be served by the same water and sewer lines. These
additional lots have been taken into account in this analysis of the water and sewer
systems.
Single Family Residential
WATER SYSTEM ANALYSIS
Primmy Water Supply : Existing 12" line along Castlegate Drive.
Domestic Demand:
Avg. Pop Density:
Average Flow:
Peaking Factor:
Peak Flow:
Design Flow:
Fire Demand:
Fire Flow:
Pipe:
Roughness Coe.ff:
Hydraulic Software:
2.67 people per lot
100 gpd/cap or 267 gpd per lot = 0.18 gpm per lot
4
0.74 gpm per lot
1.50 gpm per lot
1000 gpm at most hydraulically remote point
PVC DR-14 C909
150 (Hazen Williams)
Haestad Methods WaterCAD v.6.0
Existing City System Pressure Tests
Flow Hydrant#: V-035
Flowrate: 1140 gpm
Adj. Hydrant#: V-036
Static Pressure: 90 psi (208 ft water)
Residual Pressure: 85 psi (196 ft water)
Applicable Exhibits: Exhibit A -College Station Utilities Flow Test Report
Water System Analysis Summary
Criteria Required As Location Designed
Min. Pressure -fire (psi) 20 73 C7 FH2
Max. Velocity (fps) 12 6.82 P-1
Max. Length of 6" pipe (ft) 1500 700 (connected to ~ 8 "on both
Max Length of 6" pipe (ft) 800 25 (not connected on both ends
Max. Length of 3 "pipe (ft) 500 NA
Applicable Exhibits: Exhibit B -Water System Schematic
Conclusion
Design Criteria:
Exhibit C -Junction Summary -Static & Fire Flow Conditions
Exhibit D -Pipe Summary -Fire Flow Conditions
The proposed water system for Castlegate Subdivision, Phase 7 meets or exceeds all
of the design criteria for the City of College Station. It will provide adequate water
pressure and flow for both domestic and fire demands.
SEWER SYSTEM ANALYSIS
Primary Sewer Outfall: Existing 12" sewer line in Castlegate Drive
Domestic Demand:
Avg. Pop Density:
Average Flow:
Peaking Factor:
Pipe:
Applicable Exhibits:
Conclusion:
2.67 people per lot
100 gpd/cap or 267 gpd per lot
4
PVC D3034 SDR 26
Exhibit E -Sewer System Schematic
Exhibit F -Sanitary Sewer Analysis Spreadsheet
As indicated on the spreadsheet, the sewer system for Castlegate Subdivision, Phase
7 easily meets all of the design criteria and requirements of TCEQ and the City of
College Station. If will easily serve all of the lots in this subdivision, as well as the
future lots that will share the system.
.. n {SY ';". :::· ;~"'.;~'-·~"A:·tr1f.Z')(·~~~~·;;:~; ?-r~~\}·.i:-:.·i--:.~r ;.~.~:~·-· "· · -· ---·
Z04/2004 .12:38 FA.I 979 :164"3452 . COLLEGE STATION ruB.lITL . . :~Jf:':-'·. ·.
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Power is Progress
SetVice is Pride
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1601 GRAHAM ROAD
COLLEGE STATION TEXAS 77845
Date: 4 MARCH 2004
Number pages including cover sheet - 1
Fax to: 764-7759
Attention: JOE SCHULTZ
Company: TEXCON
From: Butch Willis Water Wastewater Division
Phone: 979-764-3435 Fax: 979-764-3452
FLOW TEST REPORT
Location: CASTLE GATE DRIVE
Flow hydrant number: Y.-035
Pitot reading: 80
(GPM): 1140
i ~-.
' .. : '.·· .",:··
\ '-· !
~001
Exhibit A
Ex hibit B
Water System Schematic
cs 01 Tested Hydrant
-~.. P-1 0 ___ .... .-8 ____ ,,____.,.., __ ~, .. _____ 1 ___ ,,._. __ ... ,._-... 1~
Castl egate Drive
.;() ----'\ --r--;--/
2s I !
: 1' 2£> :!7
C7 FH1
I
I
I
I
--_[ _j ' / ' / ' / r r r--lr--4-. ""'K'
, ~ ,' <) ,' !O , . i ---4-__ r_
I Ii I I 12
\.l
.......
ct
~ Ctl Oi Cll :;:::;
"' Ctl 0
Exhibit C
Castlegate Subdivision, Phase 7
Water System Analysis
Junction Summary
Static Flow Conditions
Label I Elevation I Demand l Hydraulic Grade
(ft) (gpm) (ft)
C7 01 317 18 519.22
C702 317 3 519 .22
C7 03 321 15 519 .22
C7 05 321 5 : 519.21
C7 FH1 316 0 519.23
C7 FH2 324 27 519.21 -ca 01 312 0 519.27
Tot. Static Demand: 69
Pressure
(psi)
87.49
87.49
85.76
85.76
87.93
84.46
89.67
Lowest Pressure in Subdivision Phase (Static): 84.46
Fire Flow Conditions
C7 01 317 18 499.41 78.92
C702 317 3 499.41 78.92
C703 321 15 499.39 77.18
C705 321 6 499.39 77.18
C7 FH1 316 0 501 .75 80.36
C7 FH2 324 1027 493.60 73.38
CB 01 312 0 507.50 84.59
Tot. Fire Demand: 1069
Lowest Pressure in Subdivision Phase (Fire): 73.38
Label I
P-1
P-2
P-4
P-5
P-6
P-8
P-9
P-1 0
Exhibit D
Castlegate Subdivision, Phase 7
Water System Analysis
Pipe Summary
Fire Flow Conditions
Length Diameter Material Hazen-Discharge I Veloci!y
(ft) (in) Williams (gpm) (ft/s)
363 8.0 PVC 150 1,069 6.82
534 8.0 PVC 150 534 3.41
536 8.0 PVC 150 -535 3.42
31 6.0 PVC 150 3 0.03
54 6.0 PVC 150 6 0.07
352 6.0 PVC 150 513 5.82
348 6.0 PVC 150 -5 14 5.84
555 12.0 PVC 150 -1,069 3.03
Highest Pipe Velocity: 6.82
Ex hibit E
Sewer System Schematic
Castlegate Drive ,, ______ .._,, ... __ _ --n--
,' 26 I :.:7
--_f __/ , / ' / ' ! ! r r--1r----4 . BUH'
, ~ ,' l) ,' 10 / I --~----{_
, ll I I 1:.:
1:;
_/ ___ \
i mpcK 1 ,~ _, /
/
1 \
' ' ----\
Line
!'rum To
\11-1 # MH #
267
GPD per
Lot GPD
Exhibit F
Castlegate Subdivision, Phase 7
Sanitary Sewer Analysis
July 3, 2006
Flow Calculations
Average Daily
Flows {ADF)
GPD CFS
Infiltration Peaking
(10% ADF) Factor
CFS
Peak
Flows
CFS
Size Material
(in.) I
Inside
Diameter
Inches I
Manning
Friction
Slope
ADF
%
Min.
Design
Slope
ADF
%
Pipe Calculations
Manning
Ave. Daily Ave. Daily Friction
Flow Flow Slope
Velocity Depth Peak
Flows
fps Inches I %
Actual Min. r Slope ior Design
Slope
Peak
Flows
%
Pipe Existing or Slope
D . d Check es1gne
Systems
%
:~: I
Velocity I
I I I fps I
Peak
Flow
Depth
Inches
--~-~-1~~t--~--+-~--+~-+~~-l-~--+-~-l---+~--+~~+-~-+-~-+--~--+-~--+~--+~--+~------+-~-+-'~-j
Outfall #! __ I
1 ., " _ c_1 _B ____ 1s __ r-_4_.s_o6-r----+-_4_,8_06-r_o_.o_o7_4-t-_o._oo_o_7--t_4_.o_o-t-_o_._o3_+--_6-+--_D_3_o3_4-+--_5_.7_9_3_1--0._00_1_0-+-_o_.8_0-+_o_. 9_5_+-_o_.2_9_+--0._0_03_5-t-_o_.8_0_1--o_.8_0_1--o_K--t-"' 1.3 7\ i o.87
c7B C7 E __ 8 __ 1 __ 2_,1_36--rf--4_,s_o6_r __ 6_,9_42--r_o._0_10_7-t-_o_._00_1_1--1_4_.o_o -+_o_.o_4_1--_8-+--_D_30_3_4-+--_7_.7_5_4--1~0_._00_0_4+--o._4o_+-_o_.7_8_+--_o_.3_9_+--o._oo_1_6-t--o-.4_0--1-o_.4_0--1c--o_K-+~1~~-·1_8 ---tl_1_._16_1
t i (. C7 _D 9 2.403 -2,403 0.0037 0.0004 4.00 0.02 6 D3034 5.793 0.0003 0.80 0.74 0.00 0.0009 0.80 0.80 OK I 1 _12 I 0.58
Ci D C7 E 12 3,204 2,403 5,607 0.0087 0.0009 4.00 0.04 8 D3034 7.754 0.0003 0.40 0.74 0.00 0.00 JO 0.40 0.40 OK I 1.12 I 1.16
t ·7 E C7 F 0 5,607 5,607 0.0087 0.0009 4.00 0.04 8 D3034 7.754 0.0003 0.40 0.74 0.00 0.0010 0.40 0.40 i OK I 1.12 Li 1.16
----1-----tt-----t----+----+-----+----+---+---+----+-----+----+----+-----+----+----+-----+----+--~I ----'----~-·-~-~--~' ---~----'--~-----'~---'----'---'~---'-----__J._--__J._--__J._-----'------'----'---Ll----'-i---1------'
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