HomeMy WebLinkAbout15-11FOR OFFICE USE ONLY
CASE NO.: \VSj_l
DATE SUBMITTED: 0/ ·bf·......,15~-
:::F~..,.· ~: ___ ---C rrY OF C oll.EGE STATION
Home of Texas A&M Univmity•
(Check one) 0 Minor
($700)
FINAL PLAT APPLICATION
0 Amending
($700)
[X] Final
($932)
0 Vacating
($932)
0 Replat
($932)
Is this plat in the ET J? ~ Yes O No Is this plat Commercial D or Residential [XI
./ MINIMUM SUBMITTAL REQUIREMENTS:
-0"" $700-$932 Final Plat Application Fee (see above).
O $233 Waiver Request to Subdivision Regulations Fee (if applicable).
D $600 (minimum) Development Permit Application I Public Infrastructure Review and Inspection Fee. Fee is
1 % of acceptable Eng ineer's Estimate for public infrastructure, $600 minimum (if fee is > $600, the balance is
~ue prior to the issuance of any plans or development permit).
~ Application completed in full. This application form provided by the City of College Station must be used and
,;nay not be adjusted or altered. Please attach pages if additional information is provided.
,-gJ ~ix (6) folded copies of plat. (A signed mylar original must be submitted after approval.)
~wo (2) copies of the grading, drainage, and erosion control plans with supporting drainage report.
WT"wo (2) copies of the Public infrastructure plans and supporting documents (if appl icable).
D Copy of original deed restrictions/covenants for replats (if applicable).
~ Title report for property current within ninety (90) days or accompanied by a Nothing Further Certificate
current within ninety (90) days. The report must include app licable information such as ownership, liens,
encumbrances, etc.
~ Paid tax certificates from City of College Station, Brazos County and College Station l.S.D.
gi-he attached Final Plat checklist with all items checked off or a brief explanation as to why they are not.
NOTE: A mylar of the approved preliminary plan must be on file before a final plat application will be considered
complete. If the mylar is submitted with the final plat application, it shall be considered a submittal for the
prel iminary plan project and processed and reviewed as such. Until the mylar has been confirmed by staff
to be correct, the final plat application will be considered incomplete.
Date of Optional Preapplication or Stormwater Management Conference .:...:N.:.:..:.YA--'----------------
NAME OF PROJECT Indian Lakes -Phase 21
ADDRESS Near intersection of Mesa Verde Drive and Kachina Cove
SPECIFIED LOCATION OF PROPOSED PLAT:
Near intersection of Mesa Verde Drive and Kachina Cove I
APPLICANT/PROJECT MANAGER'S INFORMATION (Primary contact for the project):
Name Travis Martinek E-mail travis@clarkewyndham.com
Street Address 3608 East 29th Street, Suite 100
City Bryan State Texas Zip Code 77802
Phone Number (979) 846-4384 Fax Number (979) 846-1461 ----------------
Revised 4/1 4 Page 1 of 9
PROPERTY OWNER'S INFORMA 110N (All owners must be identified. Please attach an additional sheet for multiple
, owners):
Name Smiling Mallard Development, Ltd. E-mail travis@clarkewyndham.com
Street Address 3608 East 29th Street, Suite 100
City Bryan State Texas Zip Code _7_7_8_02 ___ _
Phone Number (979) 846-4384 Fax Number (979) 846-1461 -----------------
ARCHITECT OR ENGINEER'S INFORMATION:
Name McClure & Browne Engineering/Surveying, Inc. E-mail Jeffr@mcclurebrowne.com
Street Address 1008 Woodcreek Drive, Suite 103
City College Station State Texas Zip Code 77845 -------
Phone Number (979) 693-3838 Fax Number (979) 693-2554
----------------~
Do any deed restrictions or covenants exist for this property? [g] Yes D No
Is there a temporary blanket easement on this property? If so, please provide the Volume __ N._'f,_:4 __ and Page No. _N_'.IA_
Total No. of Lots 12 ------R-0-W Acreage _2._7_7_8 ____ _ Total Acreage _2_2_.9_6_3 _______ _
Existing Use _v_a_c_an_t ____________ _ Proposed Use Single-Family Residential
Number of Lots By Zoning District NIA NIA NIA NIA NIA I NIA
Average Acreage Of Each Residential Lot By Zoning District:
NIA NIA NIA NIA NIA NIA NIA NIA
Floodplain Acreage 0. 000 ------------------------------------
Is there Special Flood Hazard Area (Zone A or Zone AE on FEMA FIRM panels) on the property? L Yes [X] No
This information is necessary to help staff identify the appropriate standards to review the application and will be used to
help determine if the application qualifies for vesting to a previous ordinance. Notwithstanding any assertion made,
vesting is limited to that which is provided in Chapter 245 of the Texas Local Government Code or other applicable law.
Is this application a continuation of a project that has received prior City platting approval(s) and you are requesting the
application be reviewed under previous ordinance as applicable?
[Z1 Yes
No
If yes, provide information regarding the first approved application and any related subsequent applications (provide
additional sheets if necessary):
Project Name: Indian Lakes Subdivision
City Project Number (if known): Unknown
Date I Timeframe when submitted: 2000
Revised 4/14 Page 2 of 9
A statement addressing any differences between the Final Plat and Preliminary Plan (if applicable):
NIA
Re uested waiver to subdivision re ulations and reason for same (if a licable :
YA
Regarding the waiver request, explain how:
1. There are special circumstances or conditions affecting the land involved such that strict application of the
[Asubdivision regulations will deprive the applicant of the reasonable use of his land .
2. The waiver is necessary for the preservation and enjoyment of a substantial property right of the applicant.
IN/A
3. The granting of the waiver will not be detrimental to the public health , safety, or welfare, or injurious to other
property in the area, or to the City in administering subdivision regulations.
IN/A
4. The granting of the waiver will not have the effect of preventing the orderly subdivision of other land in the area in
accordance with the provisions of the Unified Development Ordinance.
NIA
Fee in lieu of sidewalk construction is being requested because of the following cond ition (if applicable):
1. D An alternative pedestrian way or multi-use path has been or will be provided outside the right-of-way;
2. C The presence of unique or unusual topographic, vegetative, or other natural conditions exist so that strict
adherence to the sidewalk requirements of the UDO is not physically feas ible or is not in keeping with the
purposes and goals of the UDO or the City's comprehensive Plan ;
3. A capital improvement project is imminent that will include construction of the required sidewalk. Imminent shall
mean the project is funded or projected to commence within twelve (12) months;
4. Existing streets constructed to rural section that are not identified on the Thoroughfare Plan with an estate I
rural context;
5. C When a sidewalk is required along a street where a multi-use path is shown on the Bicycle, Pedestrian, and
Greenways Master Plan;
Revised 4/14 Page 3 of 9
6. D The proposed development is within an older residential subdivision meeting the criteria in Platting and
Replatting within Older Residential Subdivisions Section of the UDO; or
7. D The proposed development contains frontage on a Freeway I Expressway as designated by Map 6.6,
Thoroughfare Plan -Functional Classification, in the City's Comprehensive Plan.
Detailed explanation of condition identified above:
NIA
NOTE: A waiver to the sidewalk requirements and fee in lieu of sidewalk construction shall not be considered at the
same time by the Planning & Zoning Commission.
Total Linear Footage of
Proposed Public:
NIA Streets
NIA Sidewalks
NIA Sanitary Sewer Lines
NIA Water Lines
NIA Channels
NIA Storm Sewers
NIA Bike Lanes I Paths
Parkland Dedication due prior to filing the Final Plat:
ACREAGE:
NIA
NIA
NIA
NIA
---
OR
No. of acres to be dedicated + $ __ N_'!,_:A. __ development fee
No. of acres in floodplain
No. of acres in detention
No. of acres in greenways
FEE IN LIEU OF LAND:
NIA No. of SF Dwelling Units X $ NIA = $ NIA
NIA (date) Approved by Parks & Recreation Advisory Board
NOTE: DIGITAL COPY OF PLAT MUST BE SUBMITTED PRIOR TO FILING.
The applicant has prepared this application and certifies that the facts stated herein and exhibits attached hereto are
true, correct, and complete. IF THIS APPL/CATION IS FILED BY ANYONE OTHER THAN THE OWNER OF THE
PROPERTY, this application must be accompanied by a power of attorney statement from the owner. If there is more
than one owner, all owners must sign the application or the power of attorney. If the owner is a company, the application
must be accompanied by proof of authority for the company's representative to sign the application on its behalf LIEN
HOLDERS identified in the title report are also considered owners and the appropriate signatures must be provided as
described above.
Sign~UJ Date
Revised 4/14 Page 4 of 9
Existing
~
FINAL PLAT MINIMUM REQUIREMENTS
(ALL CITY ORDINANCES MUST BE MET)
INCLUDING BUT NOT LIMITED TO THE FOLLOWING:
(Requirements based on field survey and marked by monuments and markers.)
~ Drawn on 24" x 36" sheet to scale of 100' per inch.
~ Vicinity map which includes enough of surrounding area to show general location of subject property in
relationship to College Station and its City Limits. No scale required but include north arrow.
~ Title Block with the following information:
~ Name and address of subdivider, recorded owner, planner, engineer and surveyor.
~ Proposed name of subdivision. (Subdivision name & street names will be approved through Brazos
County 911 .)
~ Date of preparation.
~ Engineer's scale in feet.
~ Total area intended to be developed.
~ North Arrow.
~ Subdivision boundary ind icated by heavy lines.
~ If more than 1 sheet, an index sheet showing entire subdivision at a scale of 500 feet per inch or
larger.
~ All applicable certifications based on the type of final plat.
~ Ownersh ip and Dedication
~ Surveyor and/or Engineer
~ City Engineer (and City Planner, if a minor plat)
~ Planning and Zoning Commission (delete if minor plat)
~ Brazos County Clerk
~ Brazos County Commissioners Court Approval (ET J Plats only)
~ If submitting a replat where there are existing improvements, submit a survey of the subject property
showing the improvements to ensure that no encroachments will be created.
~ If using private septic systems, add a general note on the plat that no private sewage facility may be
installed on any lot in this subdivision without the issuance of a license by the Brazos County
Health Unit under the provisions of the private facility regulations adopted by the Commissioner's
Court of Brazos County, pursuant to the provisions of Section 21 .084 of the Texas Water Code.
~ Location of the 100-Year Floodplain and floodway, if applicable, according to the most recent available
data.
~ Lot corner markers and survey monuments (by symbol) and clearly tied to bas ic survey data.
~ Matches the approved preliminary plan or qualifies as minor amendments (UDO Section 3.3 .E.2).
The location and description with accurate dimensions, bearings or deflection angles and radi i, area , center
angle, degree of curvature, tangent distance and length of all curves fo r all of the
following: (Show existing items that are intersecting or contiguous with the boundary of or forming a
boundary with the subdivision, as well as, those within the subdivision).
Proposed
~ Streets. Continuous or end in a cul-de-sac, stubbed out streets must end into a temp
turn around unless they are shorter than 100 feet.
Public and private R.O.W. locations and widths. (All existing and proposed R.O.W.'s
sufficient to meet Thoroughfare Plan.)
Street offsets and/or intersection angles meet ordinance.
Revised 4/14 Page 8 of 9
. Existing
[g]
[g]
[g]
[g]
Proposed
[g]
[g]
[g]
[g]
Alleys.
Easements.
A number or letter to identify each lot or site and each block (numbered sequentially).
Parkland dedication/greenbelt area/park linkages. All proposed dedications must be
reviewed by the Parks and Recreation Advisory Board and documentation of their
recommendation provided prior to being scheduled for P&Z Commission consideration.
[g] Construction documents for all public infrastructure drawn on 24" x 36" sheets and properly
sealed by a Licensed Texas Professional Engineer that include the following:
[g] Street, alley and sidewalk plans, profiles and sections. One sheet must show the overall
street, alley and/or sidewalk layout of the subdivision . (may be combined with other
utilities).
Sewer Design Report.
Sanitary sewer plan and profile showing depth and grades. One sheet must show the
overall sewer layout of the subdivision . (Utilities of sufficient size/depth to meet the utility
master plan and any future growth areas.)
Water Design Report and/or Fire Flow Report.
Water line plan showing fire hydrants, valves, etc. with plan and profile lines showing
depth and grades. One sheet must show the overall water layout of the subdivision.
(Utilities of sufficient size/depth to meet the utility master plan and any future growth
areas.)
Storm drainage system plan with contours, street profile, inlets, storm sewer and
drainage channels, with profiles and sections. Drainage and runoff areas, and runoff
based on 5, 10, 25, 50 and 100 year rain intensity. Detailed drainage structure design ,
channel lining design & detention if used. One sheet must show the overall drainage
layout of the subdivision.
[g] Detailed cost estimates for all public infrastructure listed above sealed by Texas P.E.
[g] Letter of completion for public infrastructure or guarantee I surety in accordance with UDO
Section 8.6.
[g] Drainage Report with a Technical Design Summary.
[g] Erosion Control Plan (must be included in construction plans).
[g] All off-site easements necessary for infrastructure construction must be shown on the final plat with a
volume and page listed to indicate where the separate instrument easements were filed .
Separate instrument easements must be provided in recordable form to the City prior to being scheduled
for P&Z Commission consideration.
[g] Are there impact fees associated with this development? D Yes [g] No
Impact fees must be paid prior to building permit.
[g] Will any construction occur in TxDOT rights-of-way? D Yes [g] No
If yes, TxDOT permit must be submitted along with the construction documents.
NOTE: 1. We will be requesting the corrected Final Plat to be submitted in digital form if available prior to filing
the plat at the Courthouse.
2. If the construction area is greater than 5 acres, EPA Notice of Intent (NOi) must be submitted prior to
issuance of a development permit.
Print Form
Revised 4/14 Page 9 of 9
TO:
CLARKE & WYNDHAM
REAL ESTATE INVESTMENT SERVICES
TRAVIS MARTINEK
3608 East 29th Street, Suite 100
Bryan, Texas 77802
Office: (979) 846-4384 Fax: (979) 846-1461 Cell: (979) 229-9877
TRANSMITTAL SHEET
DATE:
1/13/2015
COMPANY: TOTAL NO. OF PAGES INCLUDING COVER:
CS Ping & Dvlpmt Serv See below
FAX NUMBER: PHONE NUMBER:
RE:
Indian Lakes-Phase 21 Final Plat and Construction Plans
0 URGENT 0 FOR REVIEW 0 PLEASE COMMENT 0 PLEASE REPLY 0 PLEASE RECYCLE
NOTES/COMMENTS:
Attached are the following:
• Final Plat Application and Checklist
• Tax Certificates (refer to Phase 19 submittal)
• Title Reports (refer to Phase 19 submittal)
• Drainage Report
• 6 -24"x36" copies of the Final Plat
• 2 -24"x36" copies of the construction plans
DATE:
TO:
FROM:
SUBJECT:
April 1, 2015
C ITY OF COLLEGE STATION
Home of Texas A&M University"
MEMORANDUM
Travis Martinek, via ; travis@clarkewyndham.com /
Mark Bombek, Staff Planner
INDIAN LAKES PH 21 (FP)
Staff reviewed the above-mentioned final plat as requested . The following page is a list of staff
review comments detailing items that need to be addressed. Please address the comments and
submit the following information for further staff review and to be scheduled for a future Planning
& Zoning Commission meeting:
One (1) 24"x36" copy of the revised final plat;
Thirteen (13) 11 "x17" copies of the revised final plat;
One (1) Mylar of the revised final plat (required after P&Z approval);
One (1) copy of the digital file of the final plat on diskette or e-mail to
pdsdigitalsubmittal@cstx.gov.
Upon receipt of the required documents for the Planning & Zoning meeting, your project will be
considered formally filed with the City of College Station. Please note that this application will
expire in 90 days from the date of this memo, if the applicant has not provided written response
comments and revised documents to the Administrator that seek to address the staff review
comments contained herein. If all comments have not been addressed your project will not be
scheduled for a Planning & Zoning Commission meeting. Your project may be placed on a
future agenda once all the revisions have been made and the appropriate fees paid. Once your
item has been scheduled for the P&Z meeting, the agenda and staff report can be accessed at
the following web site on Monday the week of the P&Z meeting.
http://www.cstx.gov/pz
Please note that a Mylar original of the revised final plat will be required after P&Z approval and
prior to the filing of the plat. If you have any questions or need additional information, please call
me at 979.764.3570.
Attachments: Staff review comments
PC: Jeff Robertson, McClure & Browne Engineering/Surveying, via; ./
jeffr@mcclurebrowne.com
P&DS Project No. 15-00900011
Planning & Development Services
P.O. BOX 9960 • 1101 TEXAS AVENUE · COLLEGE STATION · TEXAS · 77842
TEL 979.764.3570 ·FAX. 979.764.3496
cstx.gov/devservices
STAFF REVIEW COMMENTS NO. 2
Project: IND/AN LAKES PH 21 (FP) -15-00900011
PLANNING
1. Repeat-Provide a note to the Final Plat stating that lots 1 and 12 on Makawee Lane should
only take access from Makawee Lane.
2. Please note that you may be required to submit paid tax certificates if they are not current
prior to the filing of your plat.
3. Please note the county is still reviewing response to comments at this time. Comments will
be sent out as soon as they are received.
Reviewed by: Mark Bombek Date: 03-25-2015
ENGINEERING COMMENTS NO. 2
4. Remove the 25 ' PDE & 16' PUE shown on the Final Plat. FYI ... The easements needs
to be dedicated by separate instrument or blanket easement and filed prior the approval
of the construction plans.
5. Please show the volume/page for the existing P.U.E.'s outside the Plat boundary. It
currently is shown as just P.U.E. which may be misinterpreted as it being dedicated with
this plat.
6. The note regarding of compaction of fill or engineered slab of lots that have greater than
2 feet of fill still needs to be added on the Final Plat. This note is still required even if a
building permit is not going to be required through the city of College Station.
7. Revise and check the engineering estimate, the water system estimate is currently
showing C909 pipes instead of C900 PVC's.
8. Please double check your 100-storm year Intensity equation. I'm getting a different
value. Are you guys using B/CS's Table C-1 when determining the Intensity? Or is
something else being used? Since all the years appear to follow the equation except for
the 100-year storm event.
9. Please provide a letter regarding Acknowledging City standards.
Reviewed by: Kevin Ferrer Date: 03-30-2015
Home of Texas A&M University
---............ __________ ~CITY OF COLLEGE STATION<-----------------Home of Texas A&M University" ·.:=
MEMORANDUM
DATE : February 11 , 2015
TO: Travis Martinek, via; travis@clarkewyndham.com
FROM: Mark Bombek, Staff Planner
SUBJECT: INDIAN LAKES PH 21 (FP)
Staff reviewed the above-mentioned final plat as requested . The following page is a list of staff
review comments detailing items that need to be addressed. Please address the comments and
submit the following information for further staff review and to be scheduled for a future Planning
& Zoning Commission meeting:
One ( 1) 24"x36" copy of the revised final plat;
One (1) revised set of construction documents;
Upon receipt of the required documents for the Planning & Zoning meeting, your project will be
considered formally filed with the City of College Station. Please note that this application will
expire in 90 days from the date of this memo, if the applicant has not provided written response
comments and revised documents to the Administrator that seek to address the staff review
comments contained herein. If all comments have not been addressed your project will not be
scheduled for a Planning & Zoning Commission meeting. Your project may be placed on a
future agenda once all the revisions have been made and the appropriate fees paid. Once your
item has been scheduled for the P&Z meeting, the agenda and staff report can be accessed at
the following web site on Monday the week of the P&Z meeting.
http://www.cstx.gov/pz
Please note that a Mylar original of the revised final plat will be required after P&Z approval and
prior to the filing of the plat. If you have any questions or need additional information, please call
me at 979.764.3570.
Attachments: Staff Review Comments
Pla11ni11g & Development Services
P .0. BOX 9960 • l l 01 TEXAS AVENUE • COLLEGE STATION • TEXAS • 77842
TEL. ')79.764.3570 ·FAX. 979.764.3496
cst>1.gov/devservices
STAFF REVIEW COMMENTS NO. 1
Project: Indian Lakes Ph 21 (FP) (15-00900011)
PLANNING
1. Provide a note to the Final Plat stating that lots 1 and 12 on Makawee Lane should only take
access from Makawee Lane.
2. Please Note: County is still review documents for this phase. Comments will be sent out as
soon as they are received.
3. Please Note that any changes made to the plans that have not been requested by the City
of College Station, must be explained in your next transmittal letter. Any additional changes
on these plans that the City has not been made aware of will constitute a completely new
review.
4. Please Note that you may be required to submit paid tax certificates if they are not current
prior to the filing of your plat.
Reviewed by: Mark Bombek Date: 02-06-2015
ENGINEERING COMMENTS NO. 1
1. Show a Private drainage easement on the common area between lots 6 & 7.
2. Add a note stating whose responsibility it is to maintain and stating that fences,
grading, and landscape cannot impede the flow of the private drainage easement.
3. Add a note regarding requirement for compaction of fill or engineered slab for
affected lots that have greater than 2 feet of fill on final plat and construction
documents. Also list the lots that would require this.
4. Show the future 10' PUE along the rear of the PUE of Lots 7-8 totaling 20' PUE.
5. Dedicate the 16 feet PUE & 25 PDE easements outside the plat by separate
instrument.
6. Move WS 2.01 to the common lot boundary.
7. Show a water service line ending on the common lot boundary for lots 5 & 6 on
Makawee Lane.
8. Submit a drainage report that is sealed and signed.
9. Check your Rainfall Intensity's equation for the 100 storm event.
10. Please provide calculations showing that the water surface elevation in the ditches
are at least 6 "below the top ditch during a 25-year storm.
11. Provide Cost estimate, and B/CS Standard details.
Reviewed by: Kevin Ferrer Date: February 9, 2015
SANITATION
1. Sanitation is ok with this project.
Reviewed by: Wally Urrutia Date: January 28, 2015
MEMORANDUM
DATE: January 26, 2015
TO: Travis Martinek, via; travis@clarkewyndham.com
FROM: Mark Bombek, Staff Planner
SUBJECT: INDIAN LAKES PH 21 (FP)
Thank you for the submittal of the required documents for your Final Plat -Residential
application. Kevin Ferrer, Graduate Engineer, and I have been assigned to review this project. It
is anticipated that the review will be completed and any staff comments returned to you on or
before Monday, February 9, 2015. If you have questions in the meantime, please feel free to
contact us.
PC: Jeff Robertson, McClure & Browne Engineering/Surveying, via;
jeffr@mcclurebrowne.com
P&DS Project No. 15-00900011
Pla11ni11g & Development S1t1·vices
P.O. BOX 9960 • 1101 '11".XAS AVENUE · COLLEGE STATION · TEXAS . 77842
TEL. 979.764.3570 ·FAX. 979.764.3496
cst><.gov/devservices
MEMORANDUM
DATE: January 16, 2015
TO: Travis Martinek, via ; travis@clarkewyndham.com ~
FROM: Jason Schubert, AICP Principal Planner
SUBJECT: INDIAN LAKES PH 21 (FP)
I reviewed the above-mentioned Final Plat -Residential application and determined it to be
incomplete. The following is the preliminary list of items needed to complete the submittal.
Please submit the following information so this application can be forwarded for review:
Submit a water/fire flow report for the proposed plat. The area in this plat is not
part of the original Indian Lakes Master Plan approved in 2002 but part of the
Partners in Habitat Preservation Tract 1 Master Plan application that was
submitted in December 2007 and approved in February 2008. Therefore, as
stated during the Preliminary Plan review, the water/fire flow requirements
adopted in 2004 apply to this plat.
Please be aware that if this application is not completed before Monday, March 2, 2015, it will
expire and a new applicat_ion and fees will be necessary to continue the platting process.
If you have any questions or need additional information, please call me at 979. 764.3570.
PC: Jeff Robertson, McClure & Browne E.?€fineering/Surveying, via;
jeffr@mcclurebrowne.com v
P&DS Project No. 15-00900011
Pla11ni11g & Development Services
P.O. BOX 9960 • l 101 TEXAS AVENUE · COLLEGE STATION · TE..XAS • 77842
TEL. 979.764.3570 ·FAX. 979.764.3496
csti<.gov/devservices
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R -4 Multi-Famliy BPI BLBines Pa Industrial POD Planned Oll'Velopment District
R Ru11I R -6 Higlt D•ns ity Multi-Fa.mily NAP a.tural Area.s Prot•cted IPC Wolf Pttn Cr Dttv. Corridor
E Est1ttt M p Manuf1c:tureil Home P11 C-3 Light Commerc:ill G-1 C0t1t ~ octhg1t1t
RS R·ntrlct•d Subu bin 0 Offlc:tt M-1 Llg ht lndu1trlll G-2 Tt1n1ltlon1 I Oi'lhgltlt
GS Gen1ul Sut>u bin SC Sut>urb1n Commtttclal M-2 Hvy lndu ttlal N'G-3. Rt$ idential otthgltlt
R-18 Single F1mily Residential GC General Commercial C-lJ C-0llege and Llnivers ity ov Co id Ove lay
D Duplex Cl Commercial-lndutlrial R& D Research and Development ROD Redl!velopment District
T Townhousit BP Business Pa1t P-MlJD Planned Mixed-Lise Development KO Krenn Tap Overlay
vr IN OIA N LAKES PH 21 Case: FINAL PL AT
DEVELOPMENT REVIEW 15-11
INOIAN LAKES PH 21 Case: FINAL PLAT
OEVELOPM EN REVIEW 15· 11
DRAINAGE REPORT
FOR
INDIAN LAKES SUBDIVISION
PHASE 21
January 2015
P REPARED FOR:
SMILING M ALLARD D EVELOPMENT, L TD .
3608 E AST 29TH STREET
B RYAN, T EXAS 77 802
9 79-846-4384
.tvIBESI.No. 10620048
MBMl:H McCLURE & BROWNE ENGINEERING/SURVEYING, INC. I r -...._.. 1008 Woodcreek Dr., Suite 103 ·College Station, Tx. 77845 · (979) 693-3838 Engineer Reg. No. F-458
Survey Reg. No. 101033-00
Indian Lakes Subdivision, Phase 21
Stormwater Management Technical Design Summary Report
MBESI No. I 0620048
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 2P1 phase of a multi-phase subdivision. Phase 21 consists of 12 lots. The
phase is located in the Indian Lakes Village which is down Arrington Rd. approximately 2 miles from
the Arrington Rd./William D. Fitch Pkwy intersection. Phase 21 lies in the northeast portion of the
subdivision near the intersection of Mesa Verde Drive and Chaco Canyon Drive. The entire
subdivision has been analyzed in the initial drainage report submitted in September, 2000. The
development is lo cated within the ETJ of College Station.
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 48041C0350E effective May 16, 2012; no
portion of this property is located in a 100-year flood hazard area.
Culvert pipe and ditch sizing 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 ditches along
the proposed roadways are uniform throughout the project. The ditch profiles along all proposed
roadways were determined using the largest ditch drainage area found for Phase 21. The culverts and
ditches were analyzed using an Excel Spreadsheet which utilizes Manning's Equation for the analysis.
Section 3 -Reference
Exhibit A
Exhibit B
Exhibit C-1
Exhibit C-2
Exhibit C-3
Technical Design Summary
Drainage Area Map
Rational Method Calculations
Culvert Sizing Calculations
Ditch Capacity Calculations
Drainage Report
Indian Lakes, Phase 21
Drainage Report
Indian Lakes, Phase 21
EXHIBITS
Drainage Report
Indian Lakes, Phase 21
EXHIBIT A
Technical Design Summary
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 Ill (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 Ill 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 th e 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,
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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 ET J 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
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 I 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
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 ma in report (and its length), including any maps, drawings or
construction documents, should be itemized. An example statement might be:
"One __ -page drainage report dated
construction drawings ( __ sheets) dated
___ -page specifications document dated
the drainage report for this project."
one set of
____ , and a
comprise
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APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 2 -Project Administration I Start (Page 2.1)
Engineering and Design Professionals Information
Engineering Firm Name and Address: Jurisdiction
City: Bryan
McClure & Browne Engineering/surveying, Inc . x College Station 1008 Woodcreek Drive, Suite 103
College station, Texas 77845 Date of Submittal:
(979)693-3838
Lead Engineer's Name and Contact lnfo.(phone, e-mail, fax): Other:
Jeffery L. Robertson, P.E.
Supporting Engineering I Consulting Firm(s): Other contacts:
Developer I Owner I Applicant Information
Developer I Applicant Name and Address: Phone and e-m ail:
Smiling Mallard Development, Ltd. ( 979) 846-4384
3608 East 29th street
Bryan, Texas 77802
Property Owner(s) if not Developer I Applicant (&address): Phone and e-mail:
Project Identification
Development Name: Indian Lakes , Phase 21
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 21 of
Legal description of subject property (phase) or Project Area:
(see Section II , Paragraph B-3a)
Indian Lakes, Phase 21
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 21st phase of a multi phase subdivision. At this time the first phase has
been built. Phase 1 was submitted in September, 2000 and consisted of 58 lots . The most
recent phase submitted was Ph . 19.
General Location of Project Area, or subject property (phase):
Project site is located near the intersection of Mesa Verde Drive and Chaco Canyon Drive
in College Station, Texas .
In City Li mits? Extraterritorial Jurisdicti on (acreage):
Bryan: acres. Bryan : College Station : 31. 52
College Station: acres. Acreage Outside ET J:
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APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 2 -Project Administration Continued (page 2.2)
Project Identification (continued)
Roadways abutting or within Project Area or
subject property:
Mesa Verde Drive & Chaco Canyon Drive
Abutting tracts, platted land, or built
developments:
Indian Lakes Phase 5, Indian Lakes Phase 19,
& Undeveloped Land
Named Regulatory Watercourse(s) & Watershed(s): Tributary Basin(s):
Phase 21 is located in the Peach Creek Watershed. The neares t tributary is Peach Creek S .
Tributary 7 .2 (See FEMA Map 48041C0350E).
Plat Information For Project or Subject Property (or Phase)
Preliminary Plat File#: ____ _ Final Plat File #: Date: -----------
Name: Pending Approval St at us and Vol/Pg: Pending Approval
If two plats, sec
Status:
Zoning Information For Project or Subject Property (or Phase)
Zoning Type: Existing or Proposed? Case Code: _____ _
Case Date ____ _ Status:
Existing or Proposed? Zoning Type: Case Code: ------
Case Date ____ _ Status:
Stormwater Management Planning For Project or Subject Property (or Phase)
STORMWATER DESIGN GUIDELINES
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Participants:
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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.
Non-jurisdiction
City Needed?
Yes No x
Coordination with
Brazos County
Needed?
Yes No x
Coordination with
TxDOT Needed?
Yes No x
Coordination with
T AMUS 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 ob"ective ins aces below.
Entity
US Army Crops of
Engineers
No x Yes
US Environmental
Protection Agency
No x Yes
Texas Commission on
Environmental Quality
No Yes x
Brazos River
Authority
No x Yes
Permitted or
A
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Status of Actions (include dates)
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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 (Dense tree cover) . Existing impervious cover is
approximately 0 sf .
Site
Development
Project
(select all
applicable)
Subdivision
Development
Project
_x_ Construction of streets and utilities to serve one or more platted lots.
__ Construction of streets and utilities to serve one or more proposed lots on
lands represented by pending plats.
Describe
Nature and
Size of
Proposed
Project
Site projects: building use(s), approximate floor space, impervious cover ratio.
Subdivisions: number of lots by general type of use, linear feet of streets and
drainage easements or ROW.
This phase of the subdivision includes 12 lots. The development
consists of approximately 1,593 LF of streets with 16 ' PUE on each
side of the streets ROW .
Is any work planned on land that is not platted
or on land for which platting is not pending?
x No Yes
FEMA Floodplains
Is any part of subject property abutting a Named Regulatory Watercourse No x Yes
(Section II , Paragraph B1 ) or a tributary thereof?
Is any part of subject property in floodplain
area of a FEMA-regulated watercourse?
Encroachment(s)
into Floodplain
areas planned?
No x
No
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Yes x Rate Map 48041C03SOE
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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 x
Reference the study (&date) here, and attach copy if not already in City files.
Indian Lakes Subdivision; September, 2000
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 ·ect property is not part of multi-phase project, describe stormwater manageme
plan for roperty in Part 4.
If property !§. part lti-phase project, provide overview of storm management plan
for Project Area here. operty will comply
therewith.
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?
Identify:
x No Yes
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. _x_ Need must be evaluated. __ Detention not required.
What decision has been reached? By whom?
Detention study during Phase 1 .
If the need for How was determination made?
Type 1 Detention must be evaluated: Detention was required and is provided for the entire
Indian Lakes Subdivision. Phase 21 does not require
any additional detention.
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APPENDIX D -TECH NI CAL DESIG N SUMMARY
Part 3 -Pro~erty Characteristics l Continued (Page 3.3)
Hyd rologic Attributes of Subject Property (or Phase) (continued)
Does subject property straddle a Watershed or Basin divide? x No Yes If yes, --describe splits below. In Part 4 describe desian concept for handlina this. ----Watershed or Basin Larger acreage Lesse~
--------------~ '-
----------r---._
--------------I---
Above-Project Areas(Section II, Paragraph 83-a)
Does Project Area (project or phase) receive runoff from upland areas? __ No x Yes --
Size(s) of area(s) in acres: 1) 7 .05 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 21 streets .
Flow determination: Outline hydrologic methods and assumptions:
The Rational Method was used for flow calculati ons and the post development
land was treated as large acre residential tracts .
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 , upstream land is already developed .
Conveyance Pathways (Section II, Paragraph C2)
Must runoff from study property drain across lower properties before reaching a Regulatory
Watercourse or tributary? No x Yes
Describe le ngth and characteristics of each conveyance pathway(s). Include ownership of
property(ies ).
Runoff from Ph . 21 will leave the phase and be discharged into existing
tributaries of Peach Creek . The property is a future phase
of the Indian Lakes Subdivision .
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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
easements
exist for any
part of
pathway(s)?
es , for what part of length? % Created by? __ plat, or
instrument. If instrument(s), describe their provisions.
x No
Pathway
Areas
Nearby
Yes
Where runoff must cross lower p erties, describe charac ristics of abutting lower
property(ies). (Existing watercourse ~ Easement or Co ent aquired?)
Describe any built or impr ed drainage facilities existing nea e property (culverts,
bridges, lined channels uried conduit, swales, detention ponds, tc).
Drainage >----------------------------------->< Facilities Do any of these have hydrologic or hydraulic influence on proposed stormwater
design? _x_ No __ Yes If yes , explain:
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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)
off is to be received from upland areas, what design drainage features will be used t
accomm it and insure it is not blocked by future development? Describe fo
flow section, or 1 e point.
Discharge(s) To Lower Property(ies) (Section II, Pa ragraph E1 )
Does project incl ude drainage features (existing or future) proposed to become public via
platting? _x_ No __ Yes Separate Instrument? x No Yes
er Guidelines reference above, how will
ru ff be discharged to neighboring
prop (ies)?
__ Establishing Easements (Scenario 1)
__ Pre-development Release (Scenari 2)
Combination of the two Scenari
Scenario 1. If easements are proposed, describe where needed , and provide stat
on each. (Atta ed Exhibit# )
Scenario 2: Provide general de ription of how release(s) wil e managed to pre-development
conditions (detention, sheet flow, p ially concentrated, et .. (Attached Exhibit# )
Combination: If com bination is pro sed, expla in how harge will differ from pre-
development conditions at the pr erty line for each area (o oint) of release.
If Scenario 2, o ombination are to be used, has proposed design been coor ·
owner(s) of r eiving property(ies)? No Yes Explain and pro · e
documen
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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 f-:-:-.,.,-----,----,,----~-,-----,,-----:-:----='"""-<::::---:-~--::7"'""""---:-::---:--~~---,--~-=----,--1
Watersheds?
x No
Yes
How will runoff from Project
Area be mitigated to pre-
development cond itions?
Select any or all of 1, 2,
and/or 3, and explain below.
1. __ With facility(ies) involving other development projects.
2. __ Esta blishing features to serve overall Project Area.
3. _x_ On phase (or site) project basis within Project Area.
ared facilit (type & location of facility; design drainage area served ; relationship to siz
Project : (Attached Exhibit # )
3. By phase (or site) project: Describe planned mitigation measures for phases (or sites) in
subsequent qu estions of this Part.
aquatic echosystems proposed? __ No Yes
?
nt Practices for reducing stormwate
Su rize type of BMP and
If design of any runoff-handlin cilities deviate from p isions of B-CS Technica l
acility(ies) and explain in later q
Conduit elements
__ Ditches __ Inlets __ Valley gutters __
STORMWATER DESIGN GUIDELINES
Effective February 2007
_______ Other
Page 11 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
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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).
Culvert #1 -2 24 " RCP Pipes on Makawee Lane
Culvert #2 -2 30" RCP Pipes on Chaco Canyon Drive
· /retention serves (wi ll serve) overall Project Area, describe how it re lates t
phase or site pr · h sical locati on, conveyance pathway(s), constru · quence):
Identify whether each of the types of drainage features listed below are included , extent of use,
and general characteristics.
Typical shape?
V-Shape
Surfaces?
Grass
Steepest side slopes:
4:1
Usual front slopes:
4:1
Usual back slopes:
4 :1
Flow line slopes: least. __ o_. 6_5_%_ Typical distance from travelway: 11 '
typical __ v_a_r _i e_s_ g reatest_-"-3_,_. 1=5,_,%'--(Attached Exhibit # )
Are longitudinal culvert ends in compliance with B-CS Standa rd Specifications?
x Yes No, then explain:
rsections or otherwise, do val ley gu tters cross arterial or collector stre
STORMWATER DESIGN GUIDELINES
Effective February 2007
Yes If yes explain:
Page 12 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
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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)
C'-·
-0 Q)
Usual
Are 1 ets recessed on arterial and collector streets?
identify here and why.
Greatest
Yes
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.
~ Will inlet size and placemen revent exceeding allowa e water spread for 10-year
03 design storm throughout site ( hase)? __ Y No If no, explain. ~ ::i
Ol
-g 'O
C\J Q) -e .£ ac 0 .r:. (.) ~~ ·~
en a;
Q)
I-v;
Yes No Are inlets and
OJ 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.
for cu rb, gutter, and inlets comply with B-CS Technical Specific ·ons?
No If not, describe difference(s) and attach justification.
No Yes
Are downstream soffi at or below upstream soffits?
Yes __ N __ If not, expla in where and why:
If not, explain where
Leas ount that hydraulic
grade line · elow gutter line
(system-wide):
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Page 13 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised Februarv 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4 -Drainage Concept and Design Parameters Continued (Page 4.5)
Stormwater Management Concept (continued)
W ithin Or Serving Subject Property (Phase, or Site) (continued)
al 0 CJlZ ::i i xi
CJ)
(1)
Describe watercourse(s), or system(s) receivi ng system discharge(s) below
(include design discharge velocity, and angle between converging flow line
For each outfall abov , what measures are taken to
receiving and all ilities at juncture?
1)
2)
swale(s) situated along property lines between properties? __ No
Num r of instances: For each instance answer the following questio
ments (including low-flow flumes if any):
4: Will 100-year desi storm runoff be contained within easement(s
ROW in all inst ces? Yes No If "no" explain:
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 14 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
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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)
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Are roadside ditches used? __ No __ x _ Yes If so, provide the following:
Is 25-year flow contained with 6 inches of freeboard throughout? _x_ Yes
Are top of banks separated from road shoulders 2 feet or more? _x_ Yes
Are all ditch sections trapezoidal and at least 1.5 feet deep? Yes
For any "no" answers provide location(s) and explain:
All Ditches are V-shaped and at least 2 ' deep
x
conduit is beneath a swale, provide the following information (each instance).
Is 100-ye design flow contained in conduit/swale combination?
If "no" expla· :
r storm flow? ROW Easement
Swale Surface ty , minimum Conduit Type and size, minim
and maximum slopes: slopes, design storm:
Inlets Describe how condui ·s loaded (from streets/star drains, inlets by type):
Is 100-year design flow containe
If "no" explain:
ROW Easement
Conduit Type and size, mi
slopes, design storm:
Inlets Describe ow conduit is loaded (from streets/storm drains, inl
Yes
escribe how maintenance access is provided (to swale, into condu'
No
No
No
No
No
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Page 15 of26 APPENDIX. D: TECH. DESIGN SUMMARY
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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)
c
C1l Ci. E x 0 w .;::
"yes" provide the following information for each instance:
15 CJ) Is 100-year design w contained in swale? Yes
c Cll within drainage ROW . __ Yes __ No Explain "no" swers: .; ~I t--~~~~~~~~~~--~~~~~~~~~~~~~~~~~~~----.
u Access nee access is provide· Cll .._ 0
; z 1 x I t--~~~~~~~~~~~~~~-----+-~~~~~~~~~~~~~~----<
~ Instance 2 Describe general location, ap
Cll ·c C'-· :::i CJ)
.0 c
::; Cll o E
£ ~ ·~ ~
CJ) .._
~ 0 ~ 5:
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= 0:: ~ .~
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Ci) c c C1l .c u
.0 :::i 0..
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~
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CJ)
Cll >-
I
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x/
No Is swale wholly Is 100-year design flow co
within drainage ROW? Explain "no ' answers:
w" channels: Will any area(s) of concentrated flow be channelized (deepened
wide or straightened) or otherwise altered? __ No __ Yes If only · tly
shaped, s "Swales" in this Part. If creating side banks, provide informati elow.
Will design repl1 e natural channel? Yes No If "no"
describe section sha & area, flow line slope (min . & max.), s
design flow, and amount reeboard:
Instance 1:
Instance 2:
Instance 3:
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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)
-0 QJ
~ c ~
0 ~
CJ) c QJ
E QJ > 0 c.
E
(ii c c co ..c u
No Yes
Wi small creeks and their floodplains remain undisturbed? __ Yes __ No
man disturbance instances? Identify each planned location :
For each loc tion , describe length and general type of proposed improv,
(including floo lain changes):
For each location , des ibe section shape & area, flow line sl
surfaces, and 100-year sign flow.
Watercourses (and tributaries): e changes, are Regulatory
Watercourses proposed to be altered . __ o __ Yes Explain below.
Submit full report describing proposed c n s to Regulatory Watercourses. Address
existing and proposed section size and sh e, surfaces, alignment, flow line changes,
length affected, and capacity, and provid f documentation of analysis procedures
and data. Is full report submitted? No If "no" explain:
If design is to replicate nat al channel, identify location a length here, and describe
design in Special Design ection of this Part of Report.
Will 100-year flo be contained with one foot of freeboard?
not, identify loc ion and explain:
No If
I easements sized to contain channel and required maintenance spa e?
No If not, identify location(s) and explain:
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 17 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
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?
each dry-type facilitiy: Facility 1
__ yes
__ yes
For each provide info. belo
Facility 2
no no
no no
I For each facility what is 25-
('-·
"O (!)
(/)
0 0.. e 0...
(/)
(!)
:E ·c:;
Cll
LL
c 0 ~ (!) a;
0
(!)
4:
Facility 1:
Facility 2:
Do outlets and spillways discharge 1 to a public fa llity in easement or ROW?
Facility 1: __ Yes No
If "no" explain:
For each, what is velocity of 25-yr desi
Facility 1: & ----+--
Are energy dissipation measures
location:
For each, is spillway su
Facility 1:
Facility 2:
Facilit 2: Yes No
Yes Describe type and
es or no, and describe:
For each, what easures are taken to prevent erosion or scour at rec ·ving facility?
Facility 1:
If berm are used give heights, slopes and surface treatments of sides.
1:
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 18 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4 -Drainage Conce~t and Design Parameters I Continued (Page 4.10)
Stormwater Management Concept (continued)
Within Or Servi ng Subject Property (Phase, or Site) (continued)
tructures comply with B-CS Specifications? Yes or no, and explain if "no":
Facility 1; en (])
:E 'B ::;;-Ctl (]) Facility 2: LL :J c c:.;::;
0 c ~ 0 c (_) m-
For additi onal faciliti~ide all same information on a se~sheet. a;
0 ~~to be used for detention? __ No _Yes ~ 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? --Yes --No
Without ca using fl owing or standing water on public roadway? --Yes --No
Designs & materials comply with B-CS Technical Specifications? __ Yes --No
Explain any "no" answers:
C'· en Ol c
en Are culverts parallel to public roadway alignment? __ Yes No Explain: en 0 --u en
(]) (])
co >-
>
I ·;:: Creeks at Private Drives: Do private driveways, drives, or streets cross drainage 0. co ways that serve Above-Project areas or are in public easements/ ROW?
-0 0 No Yes If "yes" provide information below. (]) z ----en
x i
:J How many instances? Describe location and provide information below. en t
(]) Location 1: 2:
:J (_)
(]) 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 fl ow?
For more instances describe location and same information on separate sheet.
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 19 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4 -Drainage ConceQt and Design Parameters / Continued (Page 4.11)
Stormwater Management Concept (continued)
Within Or Serving Subject Property (Phase, or Site) (continued)
Named Regulato~ Watercourses (&Tributaries}: Are culverts proposed on these
facilities? x No __ Yes, then provide ful l 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 Major Collector Streets: Will culverts serve these types of roadways? Q)
<lJ x No Yes How many instances? For each id entify the .r::::. (/) -- --
<lJ location and provide the information below.
(/) 11i Instance 1: <lJ .... >-~ x /~ Instance 2:
Instance 3: c 0 o~ Yes or No for the 100-year design flow: 1 2 3 z E
I~ Headwater WSE 1 foot below lowest curb top?
Spread of headwater within ROW or easement?
E ('-· C1l Is velocity lim ited per conditions (Table C-11 )? (/) (/) g1-o Explain any "no" answer(s): ·-c ~ C1l
0 c .... 0
(..):.;::;
>. C1l C1l (.)
$: ..Q
"O <lJ C1l .0 Minor Collector or Local Streets: Will culverts serve these types of streets? 0 ·-.... ....
(.) (.) No x Yes How many instances? 2 for each identify the ·-(/) -<lJ -----§ "O location and provide the information below:
0.. <lJ
-0.. Instance 1: Culvert #1 on Makawee Lane ro~
"O >. Instance 2: Culvert #2 on Chaco Canyon Drive <lJ c (/) C1l ::J.._ Instance 3: .l!l 0 .... (/) <lJ <lJ For each instance enter value, or "yes" I "no" for1 1 2 3 ..::: (.) ::J c (.) C1l Design yr. headwater WSE 1 ft. below curb top? Yes <lJ 1ii Yes .... c <( ·-100-yr. max. depth at street crown 2 feet or less? Yes Yes ~ 0 Product of velocity (fps) & depth at crown (ft)= ? 0 E 0
0 Is velocity lim ited per conditions (Table C-11 )? Yes Yes ~
Limit of down stream analysis (feet)? 50 ' 50 '
Explain any "no" answers:
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 20 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4 -Drainage Conce~t and Design Parameters I 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)? _!:_____No __ Yes If yes,
identify location(s) and provide justification:
-Are flumes or conduit to discharge into or near surfaced approaches to culvert ends?
-a x No Yes If "yes" identify location(s), describe outfall design treatment(s): Ql ----::J c :g
0 ~
(/J
t'. Ql Is scour/erosion protection provided to ensure long term stability of culvert structural > "S u 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 cul vert 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
Effective February 2007
Page 21of 26 APPENDIX. D: TECH. DESIGN SUMMARY
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)
(/)
Q)
Ol "O ·;::
CD
.£
Cll :::J a
'--(])
-ro s
bridge included in plans for subject property project? No Yes
If "ye " rovide the following information.
Name(s) a functional classifica tion of the roadway(s )?
A full report supporting al spects of the proposed bridge(s tructural, geotechnical,
Is a Stormwater
Pollution Prevention
Plan (SW3P)
established for
project construction?
No x Yes
1c factors) must accompany this summa eport. Is the report
No If "no" explain:
Provide a general description of planned techn iques:
Hay Bale Barriers and Rock Dams will serve as the
main protection against stormwater pollution. The
Contractor shall use any other means necessary
throughout construction .
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.
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 22 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2009
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 8-CS Technical Specifications
If a design(s) or material(s) of traditional runoff-handling facilities deviate from provisions of
B-CS chnical Sp ecifications, check type facility(ies) and explain by specific detail eleme .
De tion elements __ Drain system elements __ Channel features
Cu Ive Swales Ditches Inlets tfalls
__ Valley gut __ Bridges (explain in bridge report)
1)
2)
3)
4)
5)
Have elements been co inated with the City Engineer or her/his des
2)
3)
4)
Hydrology
no", action date, and staff name:
Design Parameters
Is a map(s) showing all Design Drainage Areas provided? x Yes
Briefly summarize the range of applications made of the Rational Formula:
No
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 Drai nage Area to which the Rational Formula
has been applied? 18 . 35 acres Location (or identifier): Ditch Line Culvert #2
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 23 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised Februarv 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4 -Drainage Conce~t and Design Parameters I Continu ed (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 ra in depth cri teria 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.
Feature Analysis Year(s) Design Year
Stor11 ~tern for arterial and collector streets -------Storm drain system fur'"~., .... .,J d~ -------Open channels ----..._,_----Swale/buried con dui~n lieu of channel --------s~ -------Roadside ditches and culverts serving them 2 ,5,10,25,50 ,100 25 & 100
~cilities: spillway crest and its outfall -------Detention facilitie~ conveyance structure(s) ---------Detention facilities: volume when ~ed ~ ~
Culverts serving private drives or~ ----------Culverts serving ~ _-5;ays ----------~vide in bridge report. --------Hydraulics
What is the range of design flow velocities as outlined be low?
Design flow velocities; 25 year Gutters Conduit Culverts Swales Channels
Highest (feet per second)
Lowest {feet per second)
Streets and Storm Drain Systems
Roughness coefficients used:
For conduit type(s) RCP 0 .014
STORMWATER DESIGN GUIDELINES
Effective Februa ry 2007
8 .43
6 57
Provide the summary information outlined below:
For street gutters:
Page 24 of 26
NA
Coefficients:
APPEN DIX. D: TECH. DESIGN SUMMARY
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 tti ollowing, are assumptions other than allowable per Guidelines?
Inlet coe 1 • nts? No Yes Head and friction losses
Explain any "y " answer:
In conduit is velocity general · creased in the downstream dire on?
Are elevation drops provided at in
Explain any "no" answers:
For 100-year flow conditions?
What tailwater conditi s were assumed at outfall point(s) of the storm
plain:
Yes
Yes
Yes No
Open Channels If a HEC analysis is utilize d, does it follow Sec Vl.F.5.a? Yes
No
No
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 cu lvert, 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
Effective February 2007
Page 25 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4 -Drainage Conce~t and Design Parameters I 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 su bject property
project? List them below, being sure to identify the software name and version, th e date of the
version, any applica ble patches and the publisher
Open Office Calculator Spreadsheet
Part 5 -Plans and S~ecifications
Requirements for submittal of construction drawings and specifications do not differ due to use of a
Technical Design Summary Report. See Section Ill , Paragraph C3.
Part 6 -Conclusions and Attestation
Conclusions
Add any concluding information here:
The Indian Lakes Subdivision, Phase 21 will have no adverse impact to downstream
properties and conforms to the overall subdivision report .
Attestation
Provide attestation to the accuracy and completeness of the foregoing 6 Parts of this Technical
DesiQn Summary Drainage Report by signing and sealinq 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
required by any and all state and federal regulatory agencies for the proposed drainage
improvements have been issued or fall under applicable general permits."
Licensed Professional Engineer
State of Texas PE No.
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 26 of 26
(Affix Seal)
APPENDIX. D: TECH. DESIGN SUMMARY
As Revised Februarv 2009
Drainage Report
Indian Lakes, Phase 21
EXHIBITB
Drainage Area Map
EXHIBIT C-1
Rational Method Calculations
Drainage Report
Indian Lakes, Phase 2 1
< ~ w c 0 0:: w ...J ...J < < 0. < u. w w ·o i== I-c (.!) 0:: ...J z < z < < w z w (.) ~ i= > w :ii; z ...J c ...J < wci: w < 0:: (.!) ~ u; I-cw > I-wz 0 ~!i w < e >w c ... 0:: 0. 0...J NO. AC. 0.4 0.5 0.9 ft. 1.0 11.79 0.00 11.79 0.00 5.90 840.6 2.0 18.34 0.00 18.34 0.00 9.17 863.2 3.0 1.90 0 00 1.90 0.00 0.95 389.6 EXHIBIT C-1 Rational Formula Drainage Area Calculations Indian Lakes Phase 21 ~ 0 ~ ~ ...J u. 0 0 c ...J ...J z u. u. ~ ~ 0:: ::c 0:: u u u w I-w I-0:: ...J ~(.!) I-...J 0 I-u W...J I-...J ...J w >ci: =>ffi =>ci: ~ c;; CJ) N "' Ou. (.!) ...J (.!) u. (.) ::::> N 0 "' 0 ft. ft. ft. ft/s min min In/Hr cfs In/Hr cfs 16.5 1310.0 15.1 1.5 24.4 24.4 3.94 23.2 4.9 28.84 18.4 1492.6 17.1 1.5 25.7 25.7 3.82 35.0 4.8 43.57 10.2 380.2 7.0 1.6 8.0 10.0 6.33 6.0 7.7 7.31 0 0 "' 0 0 0 0 a "' N 0 "' 0 a ..... N 0 "' 0 ..... In/Hr cfs In/Hr cfs In/Hr cfs In/Hr cfs 5.6 32.78 6.38 37.63 7.25 42.76 8.21 48.39 5.4 49.57 6.21 56.92 7.06 64.70 7.99 73.24 8.6 8.20 9.86 9.37 11.15 10.59 12.53 11.90
Drainage Report
Indian Lakes, Phase 21
EXHIBIT C-2
Culvert Sizing Calculations
Culvert #1
Culvert Description
24" RCP
at Intersection
of Chaco Canyon
Drive and
Makawee Lane
Culvert Desi!!n Criteria
Circular
Pipe No.
I Dia (ft) Pipes
2.00 2
Culvert Analysis Calculations
Total Flow per Critical
Design Flow Pipe Depth(ft.)
Storm (cfsl (cfsl de
5 28.84 14.42 1.35
10 32.78 16.39 1.45
25 37.63 18.82 1.55
50 42.76 21 .38 1.65
100 48.39 24.20 1.75
n
0.014
Normal
Depth
(ft)
1.21
1.32
1.46
1.65
2.00
Invert
Elev. (Eli)
(ft.)
278.75
EXHIBIT C-2
CULVERT ANALYSIS
Indian Lakes Phase 21 -Culvert #1
¥-Top of Road / ELho
!HWi ~1; -----~~
ELhi~
"----~---
__/
-- - -_____ .,_ _ _ TW
,,,......--· - ---
ELi Proposed Culven -~-ELo
Outfall Channel Desi n Criteria
Outlet Culvert Top Lt. Side Rt. Side Bottom
Elev. (Elo) Length Slope of Slope Slope Slope Width n
(ft.) (ft.) (ft/ft) Road ke I ft/ft ?:1 ?:1 ft.
278.25 49.00 0.0102 282.93 0.50 l 0.0100 4.00 4.00 0.00 0.024
HEADWATER CALCULATIONS Control Type Outlet
INLET CONTROL OUTLET CONTROL HW of Velocity Freeboard
HWi/D HWi ELhi TW de <de+ 0112 ho H EL ho Elev. Control (fps) (ft)
1.04 2.09 280.84 1.26 1.35 1.68 1.68 0.72 280.65 280.84 Inlet 7.27 2.09
1.13 2.27 281 .02 1.32 1.45 1.73 1.73 0.93 280.91 281 .02 Inlet 7.47 1.91
1.26 2.52 281 .27 1.40 1.55 1.78 1.78 1.23 281 .25 281.27 Inlet 7.64 1.66
1.41 2.82 281 .57 1.46 1.65 1.83 1.83 1.58 281 .66 281.66 Outlet 7.71 1.27
1.60 3.20 281 .95 1.53 1.75 1.88 1.88 2.03 282.15 282.15 Outlet 8.30 0.78
Culvert #2
Culvert Description
30" RCP
at Chaco Canyon
Drive
C I rt D . C ·1 . u ve es1gn ri eria
Circular
Pipe No.
Dia. lft.l Pipes
2.50 2
Cl u vert Analysis c alculations
Total Flow per Critical
Design Flow Pipe Depth(ft.)
Storm (cfs) (cfs) de
5 43.57 21.79 1.60
10 49.57 24.79 1.70
25 56.92 28.46 1.80
50 64.70 32.35 1.95
100 73.24 36.62 2.07
n
0.014
Normal
Depth
(ft.)
1.69
2.00
2.00
2.00
2.00
Invert
Elev. (Eli)
(ft)
275.44
EXHIBIT C-2
CULVERT ANALYSIS
Indian Lakes Phase 21 -Culvert #2
ELhi
Outlet Culvert Top
Elev. (ELo) Length Slope of
(ft) (ft) (ft/ft) Road ke I
275.22 47.00 0.0047 282.93 0.50 I
HEADWATER CALCULATIONS
~ Top of Road / ELho
l HWi ~;------~~
__/
--- -_____ ..,_ _ _ TW
,.........--· -- --
ELi Proposed Culvert -~-ELo
0 f II Ch ut a anne ID . C. es1gn riteria
Lt. Side Rt Side Bottom
Slope Slope Slope Width n
(ft/ft) (?:1) (?:1) (ft.)
0.0100 4.00 4.00 0.00 0.024
Control Type Outlet
INLET CONTROL OUTLET CONTROL HW of Velocity Free board
HWi/D HWi ELhi TW de (de+ D)/2 ho H ELho Elev. Control (fps) (ft.)
0.97 2.42 277.86 1.47 1.60 2.05 2.05 0.61 277.88 277.88 Outlet 6.57 5.05
1.04 2.59 278.03 1.55 1.70 2.10 2.10 0.79 278.11 278.11 Outlet 6.97 4.82
1.13 2.83 278.27 1.64 1.80 2.15 2.15 1.04 278.41 278.41 Outlet 7.52 4.52
1.25 3.11 278.55 1.71 1.95 2.23 2.23 1.35 278.79 278.79 Outlet 7.88 4.14
1.39 3.47 278.91 1.79 2.07 2.29 2.29 1.73 279.23 279.23 Outlet 8.43 3.70
DRAINAGE REPORT
FOR
INDIAN LAKES SUBDIVISION
PHASE 21
March 2015
PREPARED FOR:
SMILING MALLARD DEVEL OPMENT, LTD.
3608 EAST 29 TH STREET
BRYAN, TEXAS 77802
9 79-846-4384
MBESI No. 10620048
RBs.@12 McCLURE & BROWNE ENGINEERING/SURVEYING, INC. I f ~ 1008 Woodcreek Dr., Suite 103 ·College Station, Tx. 77845 · (979) 693-3838 Engineer Reg. No. F-458
Survey Reg. No. 101033-00
Indian Lakes Subdivision, Phase 21
Stormwater Management Technical Design Summary Report
MBESI No. 10620048
PART I -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 29tl' Street
Bryan, Texas77802
Section 2 -General Information and Project Location
This development is the 2!51 phase of a multi-phase subdivision. Phase 21 consists of 12 lots. The
phase is located in the Indian Lakes Village which is down Arrington Rd. approximately 2 miles from
the Arrington Rd./William D. Fitch Pkwy intersection. Phase 21 lies in the northeast portion of the
subdivision near the intersection of Mesa Verde Drive and Chaco Canyon Drive. The entire
subdivision has been analyzed in the initial drainage report submitted in September, 2000. The
development is located within the ETJ of College Station.
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 48041C0350E effective May 16, 2012; no
portion of this property is located in a 100-year flood hazard area.
Culvert pipe and ditch sizing 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 ditches along
the proposed roadways are uniform throughout the project. The ditch profiles along all proposed
roadways were determined using the largest ditch drainage area found for Phase 21. The culverts and
ditches were analyzed using an Excel Spreadsheet which utilizes Manning's Equation for the analysis.
Section 3 -Reference
Exhibit A
Exhibit B
Exhibit C-1
Exhibit C-2
Exhibit C-3
Technical Design Summary
Drainage Area Map
Rational Method Calculations
Culvert Sizing Calculations
Ditch Capacity Calculations
Drainage Report
Indian Lakes, Phase 21
Drainage Report
Indian Lakes, Phase 21
EXHIBITS
Drainage Report
Indian Lakes, Phase 21
EXHIBIT A
Technical Design Summary
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 Ill (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 Ill 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
Effective February 2007
Page 1of26 APPENDIX. D: TECH. DESIGN SUMMARY
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 ET J 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
easements (or ROW) on the property, or on neighboring properties if they service
runoff to or from the property.
5. The general plan fo r 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 I 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
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 main report (and its length), including any maps, drawings or
construction documents, should be itemized. An example statement might be:
"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."
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 2 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 2 -Project Administration I Start (Page 2.1)
Engineering and Design Professionals Information
Engineering Firm Name and Address: Jurisdiction
City: Bryan
McCl ure & Browne Engineering/Surveying, Inc. x College Station 1008 Woodcreek Drive, Suite 103
College Station, Texas 77845 Date of Submittal:
(979)693-3838
Lead Engineer's Name and Contact lnfo.(phone, e-mail, fax): Other:
Jeffery L. Robertson, P.E.
Supporting Engineering I Consulting Firm(s): Other contacts:
Developer I Owner I Applicant Information
Developer I 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 I Applicant (& address): Phone and e-mail:
Project Identification
Development Name: Indian Lakes, Phase 21
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 21 of
Legal description of subject property (phase) or Project Area:
(see Section II , Paragraph B-3a)
Indian Lakes, Phase 21
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 21st phase of a multi phase subdivision. At this time the first phase has
been built. Phase 1 was submitted in September, 2000 and consisted of 58 lots . The most
recent phase submitted was Ph. 19.
General Location of Project Area, or subject property (phase):
Project site is located near the intersection of Mesa Verde Drive and Chaco Canyon Drive
in College Station, Texas.
In City Limits? Extraterritorial Jurisdiction (acreage):
Bryan: acres. Bryan: College Station: 31.52
College Station: acres. Acreage Outside ET J:
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 3 of 26 APPENDIX. D: TECH . DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 2 -Project Administration I Continued (page 2.2)
Project Identification (continued)
Roadways abutting or within Project Area or Abutting tracts, pl atted land , or built
subject property: developments:
Mesa Verde Drive & Chaco Canyon Drive Indian Lakes Phase 5, Indian Lakes Phase 19,
& Undeveloped Land
Named Regulatory Watercourse(s) & Watershed(s): Tributary Basin(s):
Phase 21 i s located in the Peach Creek Watershed. The nearest tri butary is Peach Creek S.
Tributary 7.2 (See FEMA Map 48041C0350E).
Plat Information For Project or Subject Property (or Phase)
Prelim inary Plat File#: Final Plat File#: Date:
Name: Pending Approval Status and Vol/Pg: Pending Approval
If two plats, second name: File#:
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)
Planning Conference(s) & Date(s): Participants:
Preliminary Report Required? Submittal Date Review Date
Review Comments Addressed? Yes --No --In Writing? When?
Compliance With Preliminary Drainage Report. Briefly describe (or attach documentation
explaining) any deviation(s) from provisions of Preliminary Drai nage Report, if any .
STORMWATER DESIGN GUIDELINES
Effective Feb ruary 2007
Page 4 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 2 -Project Administration I 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.
Coordination Dept. Contact: Date: Subject:
With Other
Departments of
Jurisdiction
City (Bryan or
College Station)
Coordination With Summarize 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 Cou nty
Needed?
Yes No x -- --
Coordination with Summarize need(s) & actions taken (include contacts & dates):
TxDOT Needed?
Yes No x ----
Coordination with Summarize need(s) & actions taken (include co ntacts & dates):
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
Approved?
US Army Crops of
Engineers
No x Yes ---
US En vironmental
Protection Agency
No x Yes ---
Texas Commission on
Environmental Quality
No Yes x ----
Brazos River
Authority
No x Yes ---
STORMWATE R DESIGN GU IDELINES
Effective February 2007
Status of Actions (include dates)
A Stormwater Pollution Prevention Plan must be
implemented prior to the start of construction
according to TPDES General Permit No. TXR150000.
Page 5 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 3 -Pro~ert~ Characteristics I 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 (Dense tree cover) . Existing impervious cover is
approximately O sf.
Site __ Redevelopment of one platted lot, or two or more adjoining platted lots.
Development __ Building on a single platted lot of undeveloped land.
Project __ Building on two or more platted adjoining lots of undeveloped land.
(select all __ Building on a single lot, or adjoining lots, where proposed plat will not form applicable) a new street (but may include ROW dedication to existing streets).
__ Other (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: num ber 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 12 lots. The development
Proposed consists of approximately 1,593 LF of streets with 16' PUE on each
Project side of the streets ROW.
Is any work planned on land that is not platted If yes, explain:
or on land for which platting is not pending?
x No Yes -- --
FEMA Floodplains
Is any part of subject property abutting a Named Regulatory Watercourse I No _x_ Yes __ (Section II, Paragraph B1) or a tributary thereof?
Is any part of subject property in floodplain !No_ Yes x Rate Map 4B041C03soE area of a FEMA-regulated watercourse? --
Encroachment(s) Encroachment purpose(s): __ Building site(s) __ Road crossing(s) into Floodplain
areas planned? __ Utility crossing(s) __ Other (explain):
No x --
Yes --
If floodplain areas not shown on Rate Maps, has work been done toward amendin g the FEMA-
approved Flood Stu dy to define allowable encroachments in proposed areas? Explain.
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 6 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 3 -Pro~erty: Characteristics I 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.
Indian Lakes Subdivision ; September, 2000 x --
Is the stormwater management plan for the property in su bstantial confo rmance 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
th erewith.
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. x Need must be evaluated. __ Detention not required. --
What decision has been reached? By whom?
Detention study during Phase 1.
If the need for How was determination made?
Type 1 Detention Detention was required and is provided for the entire must be evaluated:
Indian Lakes Subdivision. Phase 21 does not require
any additional detention.
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 7 of 26 APPENDIX. D: TECH . DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 3 -Progert~ Characteristics I 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 , ----describe splits below. In Part 4 describe desiqn concept for handlinq this.
Watershed or Basin Larger acreage Lesser acreage
Above-Project Areas(Section 11, Paragraph 83-a)
Does Project Area (project or phase) rece ive runoff from upland areas? No x Yes ----
Size(s) of area(s) in acres: 1) 7 .05 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 21 streets.
Flow determination: Outline hydrologic methods and assumptions:
The Rational Method was used for flow calculations and the post development
land was treated as large acre residential tracts.
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, upstream land is already developed.
Conveyance Pathways (Section II, Paragraph C2)
Must runoff from study property drain across lower properties before reaching a Regulatory
Watercourse or tributary? No x Yes
Describe length and characteristics of each conveyance pathway(s). Include ownership of
property(ies).
Runoff from Ph. 21 will l eave the phase and be discharged into existing
tributaries of Peach Creek. The property is a future phase
of the Indian Lakes Subdivision.
STORMWATER DESIGN GUIDELI NES
Effective February 2007
Page 8 of 26 APPEN DIX. D: TECH. DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 3 -Pro~ert~ Characteristics I 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? __ plat, or
easements
exist for any
__ instrument. If instrument(s), describe their provisions.
part of
pathway(s)?
x No --
Yes --
Where runoff must cross lower properties, describe ch aracteristics 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 condu it, 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 GUIDELI NES
Effective February 2007
Page 9 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
As Rev ised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4 -Drainage ConceQt and Design Parameters I 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 11 , Paragraph E1)
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 __ Establishing Easements (Scenario 1) runoff be discharged to neighboring
property(ies)? __ Pre-development Release (Scenario 2)
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# )
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.
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.
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 10 of 26 APPENDIX. D: TECH . DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4 -Drainage Conce~t and Design Parameters I Conti nued (Page 4.2)
Stormwater Management Concept (continued)
Within Project Area Of Multi-Ph ase Project
Identify gaining Basins or Watersheds and acres shifting:
Will project result
in shifting runoff
between Basins or
between What design and mitigation is used to compensate for increased runoff
Watersheds? from gaining basin or watershed? 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.
1. Shared facility (type & location of facility; design drainage area served ; relationship to size of
Project Area): (Attached Exhibit# )
2. For Overall Project Area (type & location of facilities): (Attached Exhibit# )
3. By phase (or site) project: Describe planned mitigation measures for phases (or sites) in
subsequent questions of this Part.
Are aquatic echosystems proposed? __ No --Yes In which phase(s) or
project(s)?
C'-·
-0 Q) rn c Q) Are other Best Management Practices for reducing stormwater pollutants proposed? c >-~ Cl.. No Yes Summarize type of BMP and extent of use: ----rn c Ol "iii
Q) 0 0 z ro xi If design of any runoff-handling facilities deviate from provisions of B-CS Technical "(3
Q) Specifications, check type facility(ies) and explain in later questions. a.
(/) Detention elements Conduit elements Channel features Q) ------..._
<( Swales Ditches __ Inlets __ Valley gutters __ Outfall s ----
--Culvert features __ Bridges Other
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 11 of 26 APPENDIX. D: TECH . DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4 -Drainage Concept and Design Parameters I 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).
Culvert #1 -2 24" RCP Pipes on Makawee Lane
Culvert #2 - 2 30" RCP Pipes on Chaco Canyon Drive
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):
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? __ 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?
V-Shape I
Surfaces?
Grass
Steepest side slopes:
I
Usual front slopes: I Usual back slopes:
4 : 1 4: 1 4 :1
Flow line slopes: least __ o _. 6_5_%_ Typical distance from travelway:
typical __ v_a_r _ie_s_ greatest_~3~.1=5~%~ (Attached Exhibit # )
Are longitudinal culvert ends in compliance with B-CS Standard Specifications?
x Yes No , then explain:
At intersections or otherwise, do valley gutters cross arterial or collector streets?
___ No __ Yes If yes explain:
Are valley gutters proposed to cross any street away from an intersection?
__ No __ Yes Explain: (number of locations?)
11 '
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 12 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4 -Drainage Conce~t and Design Parameters I Continued (Page 4.4)
Stormwater Management Concept (continued)
Within Or Serving Subject Property (Phase, or Site) (continued)
Gutter line slopes: Least Usual Greatest
Are inlets recessed on arterial and collector streets? --Yes --No If "no",
identify where and why.
Will inlets capture 10-year design stormflow to prevent flooding of intersections (arterial
with arterial or collector)? --Yes --No If no, explain where and why not
C'-· "O
(l)
rfl Will inlet size and placement prevent exceeding allowable water spread for 10-year :::J ....
:§ design storm throughout site (or phase)? --Yes --No If no, explain.
:::J
Ol
"O ~ c "O C1l (l) Sag curves: Are inlets placed at low points? Yes No Are inlets and .o 2 -- --.... ·-conduit sized to prevent 100-year stormflow from ponding at greater than 24 inches? :::J -() c Yes No Explain "no" answers. 0 _c () ----:4= ..._,
3:
rfl (j)
(l) .... u;
(l) Will 100-yr stormflow be contained in combination of ROW and buried conduit on .... <l'. whole length of all streets? Yes No If no, describe where and why. ----
Do designs for curb, gutter, and inlets comply with 8-CS Technical Specifications?
Yes --No If not, describe difference(s) and attach justification.
Are any 12-inch laterals used? __ No --Yes Identify length(s) and where
used.
C'-· "O Pipe runs between system I Typical (l) Longest rfl rfl access points (feet): :::J (l)
E >-~I Are junction boxes used at each bend? --Yes --No If not, explain where
and why.
rfl
c ·-0 ~z i xi Are downstream soffits at or below upstream soffits? Least amount that hydraulic rfl grade line is below gutter line !!!. Yes No __ If not, explain where and why: --(system-wide):
STORMWATER DESIGN GU IDELINES
Effective February 2007
Page 13 of 26 APPENDI X. D: TECH. DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4 -Drainage Concegt and Design Parameters I Continued (Page 4.5)
Stormwater Management Concept (continued)
Within Or Serving Subject Property (Phase, or Site) (continued)
Ul'
Describe watercourse(s), or system(s) receiving system discharge(s) below
QJ (include design discharge velocity, and angle between converging flow lines).
() c 1) Watercourse (or system), velocity, and angle? C1l u; c
QJ .... ~ 0 ~ E 2) Watercourse (or system), velocity, and angle? ::::! .... c 0 ·--c .
0 J2 ~.S
E ai ~ ai E 3) Watercourse (or system), velocity, and angle? ..... C1l C1l ~en ~ en QJ ::::!
c~ 0
·-> ~ e -0 c._
E ..... For each outfall above, what measures are taken to prevent erosion or scour of .... QJ
0 QJ receiving and all facilities at juncture? ..... ..r::: Cf) en
QJ 1) -ro rn c._ 2) QJ en
c 3) -9-
Are swale(s) situated along property lines between properties? --No --Yes
Number of instances: For each instance answer the following questions.
Surface treatments (including low-flow flumes if any):
('· en al ~ en ..... QJ Flow line slopes (mini mum and maximum): en >-c ~ I
~ 0 en Z Outfall characteristics for each (velocity, convergent angle, & end treatment). ::::!
~x i
en
QJ .... Will 1 DO-year design storm runoff be contained within easement(s) or platted drainage <(
ROW in all instances? --Yes --No If "no" explain:
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 14 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4-Drainage Conce~t and Design Parameters I 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: en Is 25-year flow contained with 6 inches of freeboard throughout? _x_ Yes No Q) --£ .B Are top of banks separated from road shoulders 2 feet or more? _x_ Yes --No 0 Are all ditch sections trapezoidal and at least 1.5 feet deep? Yes x No Q) -----0 For any "no" answers provide location (s) and explain: ·u;
-0 All Ditches are V-shaped and at least 2 ' deep rn
0 0::
If conduit is beneath a swale, provide the followi ng information (each instance).
In stance 1 Describe general location, approximate length:
en
Q) Is 100-year design flow contained in conduit/swale combination? Yes No >-----
I ~ If "no" explain:
Q)
(.) c Space for 100-year storm flow? ROW Easement Width 0 rn z u; Swale Surface type, minimum Conduit Type and size, minimum and maximum xi c
-and maximum slopes: slopes, design storm: rn c 0
('-· :E
en -0
ai -0 Inlets Describe how conduit is loaded (from streets/storm drains, inlets by type): rn c >-c rn c
£ rn
(.) 0 c -Q) c Access Describe how maintenance access is provided (to swale, into conduit): a. 0 0 ~ -0 E :::J '-.!!! 0 -c c ·-Instance 2 Describe general location, approximate length: Q)
-0 E Q) rn en en :::J
en Q) Is 100-year design flow contained in conduit/swale combination? Yes No c -0 ·::; ----0 If "no" explain: ~ 0
c a.
Li a; Space for 100-year storm flow? ROW Easement Width E Q)
0 £
(.) en Swale Surface type, minimum Conduit Type and size, minimum and maximum ..... Q)
:::J ~ and ma ximum slopes: slopes, design storm: -0 c rn
0 a.
(.) Q) Inlets Describe how conduit is loaded (from streets/storm drains, inlets by type): -. en ~ c rn ~ 3: en
Q) Access Describe how maintenance access is provided (to swale, into conduit): -<
STORMWATER DESIGN GU IDELINES
Effective February 2007
Page 15 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2009
SEC TION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4 -Drainage Conce~t and Design Parameters I Continued (Page 4.7)
Stormwater Management Concept (continued)
Within Or Serving Subject Property (Phase, or Site) (continued)
If "yes" provide the following information for each instance:
Instance 1 Describe general location, approximate length, surfacing:
c
]!
E c_ x
0 w ~
:i:: ui Is 100-year design flow contained in swale? --Yes --No Is swale wholly 0 <ll within drainage ROW? Yes No Explain "no" answers: c >-::J
I
----.....
<ll > Qi Access Describe how maintenance access is provide: u <ll ..... 0 ....., z ::J 1 x I Instance 2 Describe general location, approximate length, surfacing:
<ll ·;::: C'-· ::J en
..0 c 5 <ll
0 E
£ (!) en Is 100-year design flow contained in swale? Yes No Is swale wholly ·~ <1l ----(!) within drainage ROW? __ Yes No Explain "no" answers: en ..... --<ll 0 ro s :s: en 0
~ n:: Access Describe how maintenance access is provided:
.!::?
..0
::J c_
Instance 3, 4, etc. If swales are used in more than two instances, attach sheet
providing all above information for each instance.
"New" channels: Will any area(s) of concentrated fl ow be channelized (deepened,
widened, or straightened) or otherwise altered? --No --Yes If only slightly
shaped, see "Swales" in this Part. If creating side banks, provide information below.
C'-·
"O c Will design replicate natural channel? Yes No If "no", for each instance <ll ----en .!!! describe section shape & area, flow line slope (min. & max.), surfaces, and 100-year 0 c_ c_ x design flow, and amount of freeboard: 0 w ..... c_ Instance 1: en en c <ll
<ll >-
E
I <ll > Instance 2: e c_
E 0 z -
xi
<ll c Instance 3: c <1l .c u
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 16 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4 -Drainage Conce~t and Design Parameters I 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
If "yes" provide the information below.
Will small creeks and their floodplains remain undisturbed? __ Yes --No How
many disturbance instances? Identify each planned location:
For each location, describe length and general type of proposed improvement
(including floodplain changes):
For each location, describe section shape & area, flow line slope (min. & max.),
surfaces, and 100-year design flow.
'C Q)
:J c ~ Watercourses {and tributaries}: Aside from fringe changes, are Regulatory 0 Watercourses proposed to be altered? __ No Yes Explain below. ~ --
<Jl c Submit full report describing proposed changes to Regulatory Watercourses. Address
Q) existing and proposed section size and shape, surfaces, alignment, flow line changes, E Q) length affected, and capacity, and provide fu ll documentation of analysis procedures > 0 and data. Is full report submitted? Yes No If "no" explain: '---a. E --Q) c c ro All Proposed Channel Work: For all proposed channel work, provide information ..c 0 requested in next three boxes.
If design is to re plicate natural channel, identify location and length here, and describe
design in Special Design section of this Part of Report.
Will 100-year flow be contained with one foot of freeboard? --Yes --No If
not, identify location an d explain:
Are ROW I easements sized to contain channel and required maintenance space?
--Yes --No If not, identify location(s) and explain:
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 17 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4 -Drainage Concegt and Design Parameters I Continued (Page 4.9)
Stormwater Management Concept (continued)
Within Or Serving Subject Property (Phase, or Site) (continued)
How many facilities for subject pro perty project? For each provide info. below.
For each dry-type facil itiy: Facility 1 Facility 2
Acres served & desig n volume+ 10%
100-yr volume: free flow & plugged
De sign di scharge (10 yr & 25 yr)
Spillway crest at 100-yr WSE? __ yes --no __ yes --no
Berms 6 inches above plugged WSE? __ yes --no __ yes --no
Explain any "no" answers:
en <ll >-
I For each facility what is 25-yr design Q, and design of outlet structure?
Facility 1:
0 z Facility 2:
xi Do outlets and spillways discharge into a public facility in easement or ROW?
Facility 1: __ Yes No Facility 2: Yes No -- ----C'-· If "no" explain: "O <ll en 0 0.. e 0.. For each, what is velocity of 25-yr design discharge at outlet? & at spillway? en
<ll Facility 1: & Facility 2: & ~ -Are energy dissipation measures used? No Yes Describe type and "(3 ----ro LL location:
c 0 ~ <ll al 0
<ll For each, is spillway surface treatment other than con crete? Yes or no, and describe: ~ Facility 1:
Facility 2:
For each, what measures are taken to prevent erosion or scour at receiving facility?
Facility 1:
Facility 2:
If berms are used give heights, slopes and surface treatments of sides.
Facility 1:
Facility 2:
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 18 of 26 APPENDIX. D: TECH. DESIGN SU MMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4 -Drainage Conce(;!t and Design Parameters I Continued (Page 4.10)
Stormwater Management Concept (continued)
Within Or Serving Subject Property (Ph ase, or Site) (continued)
Do structures comply with B-CS Specifications? Yes or no, and explain if "no":
Facility 1;
f/)
<lJ ~
=-= :0-iil <lJ Facility 2: lL ::J c c:;::::; 0 c :;::::; 0 c (.) w ~
Qi For additional facilities provide all same info rmation on a separate sheet.
0
Are parking areas to be used for detention? __ 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? --Yes --No
Without causing flowing or standing water on public roadway? --Yes --No
Designs & materials comply with B-CS Technical Specifications? __ Yes --No
Explain any "no" answers:
C'-·
f/)
Ol c "(ii Are culverts parallel to public roadway al ignment? __ Yes No Explain: f/)
0 --'-f/) (.)
<lJ <lJ ro >-
> I ·c Creeks at Private Drives: Do private driveways, drives, or streets cross drainage 0.. ro ways that serve Above-Project areas or are in public easements/ ROW?
"O 0 No Yes If "yes" provide information below. <lJ z ----f/) xi ::J How many instances? Describe locati on and provide information below. f/) t Q) Location 1: ~
::J (.)
Q) 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 se parate sheet.
STORMWATER DES IGN GUIDELINES
Effective February 2007
Page 19 of 26 APPENDIX. D: TECH. DES IGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4 -Drainage Conce~t and Design Parameters I Continued (Page 4.11)
Stormwater Management Concept (continued)
Within Or Serving Subject Property (Phase, or Site) (continued)
Named Regulato!)l 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 Major Collector Streets: Will culverts serve these types of roadways? Q)
a.> x No Yes How many instances? For each identify the .s:::. (/) ----
a.> location and provide the information below.
cn -ro Instance 1: a.> ..__
>-~ x i~ Instance 2:
Instance 3: c 0 o~ Yes or No for the 100-year design flow: 1 2 3
z E
I~ Headwater WSE 1 foot below lowest curb top?
Spread of headwater within ROW or easement?
E C'-· rn Is velocity limited per conditions (Table C-11 )? (/) (/) g1-c Explain any "no" answer(s): ·-c ~ rn
0 c ..__ 0 ()~
>-rn rn u ~ ..Q
-0 a.> rn .o Minor Collector or Local Streets: Wil l culverts serve these types of streets? 0 ·-..__ ..__
(.) (.) No x Yes How many instances? 2 for each identify the ·-(/) -a.> -----g -0 location and provide the information below:
0.. a.> _, 0.. Instance 1: Culvert #1 on Makawee Lane rn ?;-
-0 >-Instance 2: Culvert #2 on Chaco Canyon Drive a.> c ~ rn -Instance 3: (/) 0 t:: (/) a.> a.> For each instance enter value , or "yes" I "no" for~ 1 2 3 ~ (.)
:J c u rn Design yr. headwater WSE 1 ft. below curb top? Yes a.> (;) Yes ..__ c <{ ·-100-yr. max. depth at street crown 2 feet or less? Yes Yes a.> 0 Product of velocity (fps) & depth at crown (ft) = ? 0 E 0 ..__ Yes g Is velocity limited per conditions (Table C-11 )? Yes
Limit of down stream analysis (feet)? 50 ' 50'
Explain any "no" answers:
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 20 of 26 APPENDI X. D: TECH. DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4 -Drainage Conce~t and Design Parameters I 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 withi n 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:
'O Are flumes or conduit to discharge into or near surfaced approaches to culvert ends?
x No Yes If "yes" identify location(s), describe outfall design treatment(s): <I> ----:::l c :g
0 ~
en t <I> Is scour/erosion protection provided to ensure long term stability of culvert structural .-2'. :::l components, and surfacing at culvert ends? x Yes No If "no" Identify 0 ----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
Effective February 2007
Page 21 of 26 APPENDI X. D: TECH . DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4 -Drainage Conce12t and Design Parameters I Continued (Page 4.13)
Stormwater Management Concept (continued)
Within Or Serving Subject Property (Phase, or Site) (continued)
Is a bridge included in plans for subject property project? --No --Yes
If "yes" provide the following information.
Name(s) and functional classification of the roadway(s)?
What drainage way(s) is to be crossed?
Ul Q)
OJ -0 ·;::
(]]
A full report supporting all aspects of the proposed bridge(s) (structural, geotechnical,
hydrologic, and hyd raulic factors) must accompany this summary report. Is the report
provided? --Yes --No If "no" explain:
Is a Stormwater Provide a general description of planned techniques:
-~ Pol lution Prevention Hay Bale Barriers and Rock Dams will serve as the
Cii Plan (SW3P) main protection against stormwater pollution. The ::l a established for Contractor shall use any other means necessary .... project construction? Q) throughout construction. Cil s No x Yes ----
Special Designs -Non-Trad itional Methods
Are any non-traditional methods (aquatic echosystems, wetland-type detention, natural stream
replication, BMP s for water quality, etc.) proposed for any aspect of subject property project?
x No Yes If "yes" list general type and location below. ----
Provide full report about the proposed special design(s) including rationale for use and
expected benefits. Report must substantiate that stormwater management objectives will not
be compromised, and that maintenance cost will not exceed those of traditional design
sol ution(s). Is repo rt provided?
STORMWATER DESIGN GUIDELINES
Effective February 2007
Yes ----
Page 22 of 26
No If "no" explain:
APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4 -Drainage ConceQt and Design Parameters I Continued (Page 4.14)
Stormwater Management Concept (continued)
Within Or Serving Subject Property (Phase, or Site) (continued)
Special Designs -Deviation From 8-CS Technical Specifications
If any design(s) or material(s) of traditional runoff-handling facilities deviate from provisions of
B-CS Technical Specifications, check type facility(ies) and explain by specific detail element.
--Detention elements __ Drain system elements --Channel features
Culvert features Swales Ditches Inlets Outfalls -- --------
__ Valley gutters __ Bridges (explain in bridge report)
In table below briefly identify specific element, justification for deviation(s).
Specific Detail Element Justification for Deviation (attach additional sheets if needed)
1)
2)
3)
4)
5)
Have elements been coordinated with the City Engineer or her/his designee? For each item
above provide "yes" or "no", action date, and staff name:
1)
2)
3)
4)
5)
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 Ration al Formu l a 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? 18 . 35 acres Location (or identifier): Ditch Line Culvert #2
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 23 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised Febru ary 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4 -Drainage Conce~t and Design Parameters I 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.
Feature Analysis Year(s) Design Year
Storm drain system for arterial and collector streets
Storm drain system for local streets
Open channels
Swale/buried conduit combination in lieu of channel
Swales
Roadside ditches and culverts serving them 2,5,10 ,25,50,100 2 5 & 100
Detention facilities: spillway crest and its outfall
Detention facilities: outlet and conveyance structure(s)
Detention facilities: volu me when outlet plugged
Culverts serving private drives or streets
Culverts serving public roadways
Bridges: provide in bridge report.
Hydraulics
What is the range of design flow velocities as outlined below?
Design flow velocities; 25 year Gutters Conduit Cu lverts Swales Channels
Highest (feet per second) 8 .43
Lowest (feet per second) 6 57
Streets and Storm Drain Systems Provide the summary information outlined below:
Roughness coefficients used:
For conduit type(s) RCP 0.014
STORMWATER DESIGN GUIDELI NES
Effective February 2007
For street gutters:
Page 24 of 26
NA
Coefficients:
APPENDIX. D TECH. DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4 -Drainage ConceQt and Design Parameters I Continued (Page 4.16)
Design Parameters (continued)
Hydraulics (continued)
Street and Storm Drain Systems (continued)
For the following, are assumptions other than allowable per Guidelines?
Inlet coefficients? No Yes Head and friction losses No Yes --------
Explain any "yes" answer:
In conduit is velocity generally increased in the downstream direction? --Yes --No
Are elevation drops provided at inlets, manholes, and junction boxes? --Yes --No
Explain any "no" answers:
Are hydraulic grade lines calculated and shown for design storm? --Yes --No
For 100-year flow conditions? --Yes --No Explain any "no" answers:
What tailwater conditions were assumed at outfall point(s) of the storm drain system? Identify
each location and explain:
Open Channels If a HEC analysis is utilized, does it follow Sec Vl.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 (ba rrel) control or in let 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
STORMWATE R DESIGN GUIDELINES
Effective February 2007
Page 25 of 26 APPENDIX. D: TECH . DESIGN SUMMARY
As Revised February 2009
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Part 4 -Drainage Conce~t and Design Parameters I 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
Open Office Calculator Spreadsheet
Part 5 -Plans and S~ecifications
Requirements for submittal of construction drawings and specifications do not differ due to use of a
Technical Design Summary Report. See Section Ill , Paragraph C3.
Part 6 -Conclusions and Attestation
Conclusions
Add any concluding information here:
The Indian Lakes Subdivisi on, Phase 21 will have no adverse impact t o downstream
properties and conforms to the overall subdivision report .
Attestation
Provide attestation to the accuracy and completeness of the foregoing 6 Parts of this Technical
De siqn Summary Drainaqe Report by siqninq and sealinQ 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
required by any and all state and federal regulatory agencies for ·(l),e propos1'_44'<t~!1ge
improvements have been issued or fall under applicable general perrri!ts." --~r:. 0 F ; I.: ;\'I Q ' -' .. ,. ....... ., ,-1, (Affix Seal) ,.,. ''v.·· }' ··:-1 'l
,:' '.>~ .,,.i, ·-.~' I ... _., l ,,~ ,~ *.. e-.-t!; '·* ,, • ~-11: 'OI~~* ,. .... : .. '1.7. ... , .. g_.2 ......... ~
Licen ~Professional Engineer
~
State of Texas PE No. ~~7~~
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 26 of 26
l JEFFc~Y L ROBERTSON / ~····:······················:····i f •. 9t.1 ltl 5 : ,.I '°"'' '"f • •()-"' .-" •, I ',) •' '<J ,; fl 'O~··.''CEN5~',.··~~..,
I • R~···· ... .-°!\: -
.\\ "<:i/ONA~
: . "''....: -.. \ .:• ' ~~ t. ...
APPENDIX. D T~SIGN SUMMARY
As Revised February 2009
Drainage Report
Indian Lakes, Phase 21
EXHIBITB
Drainage Area Map
EXHIBIT C-1
Rational Method Calculations
Drainage Report
Indian Lakes, Phase 21
<( s w 0 0 0:: w __J __J
<( <( c.. <( LL.
LU w 0 F 1--0 0:: z <( z (!) <( __J z () <( w LU LU 5 i!= __J > 2 __J z <( LU <( 0 w <( 0:: (!) ~ iii 1--0 LU > 1--LU Z
0 z 0:: w <( 0 >w 0 1--::::> <( 0:: c.. 1--0 __J
NO. AC. 0.4 0.5 0.9 ft.
1.0 11.99 0.00 11 .99 0.00 6.00 826.0
2.0 18.55 0.00 18.55 0.00 9.28 863.2
3.0 1.90 0.00 1.90 0.00 0.95 387.8
EXHIBIT C-1
Rational Formula Drainage Area Calculations
Indian Lakes Phase 21
s 0 s s __J LL. 0 0 0 __J __J z LL. LL. ~ <( 0:: I 0:: u 0 __J w 1--w 1--~ 0:: __J 1--(!) 1--__J 0 ti w __J 1--z 1--__J __J LU > <( ::::> w ::::> <( w n; Ill "' It)
0 LL. (!) __J Cl LL. > () ::::> ~ 0 !:!? 0
ft. ft. ft. ft/s min min In/Hr cfs In/Hr cfs
15.7 1320.3 16.1 1.5 24.2 24.2 3.96 23.7 4.9 29.51
18.4 1592.8 19.4 1.6 26.1 26.1 3.78 35.1 4.7 43.65
8.7 380.2 7.0 1.5 8.5 10.0 6.33 6.0 7.7 7.29
0 0 It) 0 0 0 0 0 It) "' 0 It) 0 0 !: ~ 0 !:!? 0 !:
In/Hr cfs In/Hr cfs In/Hr cfs In/Hr cfs
5.6 33.53 6.42 38.50 7.30 43.74 7.53 45.15
5.4 49.68 6.15 57.06 6.99 64.86 7.22 67.01
8.6 8.18 9.86 9.34 11 .15 10.56 11.41 10.81
Drainage Report
Indian Lakes, Phase 21
EXHIBIT C-2
Culvert Sizing Calculations
Culvert #1
Culvert Description
24" RCP
at Intersection
of Chaco Canyon
Drive and
Makawee Lane
CI D . C. u vert es1qn ntena
Circular
Pipe No.
I Dia. (fl.) Pipes
2.00 2
. CI I . Culvert Analvs1s a cu at1ons
Total Flow per Critical
Design Flow Pipe Depth(ft.)
Storm (cfs) (cfs) de
5 29.50 14.75 1.40
10 33.50 16.75 1.50
25 38.50 19.25 1.55
50 43.70 21.85 1.70
100 45.20 22.60 1.73
Elhi = Hwi + Eli
ho= TW or {de+ D)/2 {Whichever is Greater)
n
0.014
Normal
Depth
(ft.)
1.23
1.34
1.49
1.69
2.00
EXHIBIT C-2
CULVERT ANALYSIS
Indian Lakes Phase 21 -Culvert #1
¥'-Top of Road / ELho "''~==I~====_;.====== ! ~w
ELi Proposed Culvert "'--ELo
Outfall Channel Desiqn Criteria
Invert Outlet Culvert Top Lt. Side Rt. Side Bottom
Elev. (Eli) Elev. (ELo) Length Slope of Slope Slope Slope Width n
(fl.) (fl.) (ft.) (ft/fl) Road ke I (fl/fl) (?:1) (?:1) (fl.)
278.75 278.25 49.00 0.0102 282.93 0.50 I 0.0100 4.00 4.00 0.00 0.024
HEADWATER CALCULATIONS Control Type Outlet
INLET CONTROL
HWi/D HWi ELhi
1.06 2.11 280.86
1.15 2.30 281 .05
1.28 2.57 281 .32
1.44 2.88 281 .63
1.49 2.98 281 .73
H = (1+ke+{(29'{n'2)'l)/R'1.33)]"((v'2)/2g)
Elho = Ela + H + ho
OUTLET CONTROL
TW de (de+ D)/2 ho
1.27 1.40 1.70 1.70
1.33 1.50 1.75 1.75
1.41 1.55 1.78 1.78
1.47 1.70 1.85 1.85
1.49 1.73 1.87 1.87
HW of Velocity Freeboard
H ELho Elev. Control (fps) (ft.)
0.75 280.70 280.86 Inlet 7.31 2.07
0.97 280.97 281 .05 Inlet 7.50 1.88
1.28 281 .31 281 .32 Inlet 7.66 1.61
1.65 281 .75 281 .75 Outlet 7.68 1.18
1.77 281 .88 281.88 Outlet 7.83 1.05
Culvert #2
Culvert Description
30" RCP
at Chaco Canyon
Drive
Culvert Design Criteria
Circular
Pipe No.
Dia. (ft.) Pipes
2.50 2
Culvert Analvsis Calculations
Total Flow per Critical
Design Flow Pipe Depth(ft.)
Storm (cfs\ (cfs) de
5 43.57 21 .79 1.60
10 49.70 24.85 1.70
25 57.10 28.55 1.85
50 64.90 32 .45 1.95
100 67.00 33.50 2.00
Elhi = Hwi + Eli
ho = TW or (de + D)/2 (Whichever is Greater)
n
0.014
Normal
Depth
(ft.)
1.69
2.00
2.00
2.00
2.00
EXHIBIT C-2
CULVERT ANALYSIS
Indian Lakes Phase 21 -Culvert #2
ELhi ~ ,.,---Top ofRoad / ELho
~HWi ~i~-----------~---! H
___/'--- - --__ ~ _ _ TW
ELi Proposed Culvert 'I\.
"'--ELo
0 f II Ch ut a anne ID . C 't . es1qn n ena
Invert Outlet Culvert Top Lt. Side Rt. Side Bottom
Elev. (EL0 Elev. (ELo) Length Slope of Slope Slope Slope Width n
(ft.) (ft.) (ft.) (fUfl\ Road ke I (ft/ft) (?:1) (?:1) (ft.\
275.44 275.22 47.00 0.0047 280.04 0.50 I 0.0100 4.00 4.00 0.00 0.024
HEADWATER CALCULATIONS Control Type Outlet
INLET CONTROL
HWi/D HWi ELhi
0.97 2.42 277.86
1.04 2.59 278.03
1.13 2.83 278.27
1.25 3.12 278.56
1.28 3.21 278.65
6.76
H = (1 +ke+((29"(n'2)'l)/R'1 .33)]'((v'2)/2g)
Elho = Ela + H + ho
OUTLET CONTROL
TW de (de+ D\12 ho
1.47 1.60 2.05 2.05
1.55 1.70 2.10 2.10
1.64 1.85 2.18 2.18
1.71 1.95 2.23 2.23
1.73 2.00 2.25 2.25
HW
H ELho Elev.
0.61 277.88 277.88
0.80 278.12 278.12
1.05 278.45 278.45
1.36 278.80 278.80
1.45 278.92 278.92
Of
Control
Outlet
Outlet
Outlet
Outlet
Outlet
Velocity Freeboard
(fos) (ft.\
6.57 2.16
6.99 1.92
7.33 1.59
7.90 1.24
7.96 1.12
3/17/2015
cul-p-10620048.xls
Exhibit C-2
Drainage Report
Indian Lakes, Phase 21
EXHIBIT C-3
Ditch Capacity Calculations
11 . 8' 2' 4
Area= 16.80 sf
Wetted Perimeter = 17 .27 ft
Hyd. Radius = 0.97 ft
12' 12' 4 2' 8' 11'
(''· Gcouod
Salvage Topsoil
4" Thickness (min.)
PROPOSED ROADSIDE DITCH CAPACITY
NTS
Qcapacity -1.49
0.035
( 1s ao(!.31 )1/2 16.80 \ 0.0079 = 62.4 cfs
Qactual = 57.0 cfs (25 year -Drainage Area /12 -Largest Runoff Rate Phase 21)
EXHIBIT C-3
Ditch Capacity
IND/AN LAKES, PHASE 21
COLLEGE Sl4nON, BRAZOS COUNTY, TEXAS
;y,; 1008 ll't>odcl"Hk Orlv., S<Hl• !OJ. ~ stoticn, TX 77845 ~McCLURE~ BROWNE ENGWEEmNC/SllRIDWG. WC.
• (979) 69J-J8J8 Fox: {979} 69J-2~
firm Rrtg. No. F-458
Easement Agreement for Drainage
Notice of confidentiality rights: If you are a natural person, you may remove or strike any or all of
the following information from any instrument that transfers an interest in real property before it
is filed for record in the public records: your Social Security number or your driver's license
number.
Date: July U 2015
Granter: SMILING MALLARD DEVELOPMENT, LTD., a Texas limited partnership; and
PAUL CLARKE, individually
Grantor's Mailing Address: 3608 East 29th Street, Suite 100, Bryan, Brazos ~aunty, TX 77802
Grantee (individually and collectively) and Grantee's Mailing Addresses:
BRYAN TEXAS UTILITIES
205 E. 28°' Street
Bryan, Texas 77803
WELLBORN SPECIAL UTILITY DISTRICT
411 8 Greens Prairie Road
College Station, Texas 77845
COUNTY OF BRAZOS, TEXAS-ROAD & BRIDGE DEPARTMENT
2617 Highway 21 West
Bryan, Texas 77803
Easement Property: See Exhibit "A" attached hereto and made a part hereof.
Easement Purpose: For the installation, construction, operation, maintenance, replacement, repair,
upgrade, and removal of the following utility infrastructure and related facilities thereto
(collectively, the "Facilities"): Storm Water Drainage ditches, drainage pipes and all other
drainage structures.
Consideration: Good and valuable consideration, the receipt and sufficiency of which are acknowledged
by Granter.
Reservations from Conveyance: As provided in Paragraph 3 below.
Exceptions to Warranty: This conveyance is made by Granter and accepted by Grantee subject to any
and all existing easements, covenants, rights-of-way, conditions, restrictions, outstanding mineral
interests and royalty interests, if any, relating to the Easement Property, to the extent, and only to
the extent, that the same shall be in force and effect, and either shown of record in the Office of
the County Clerk of Brazos County or that may be apparent on the Easement Property.
Grant of Easement: Granter, for the Consideration and subject to the Reservations from Conveyance and
{ 00334593} .
Exceptions to Warranty, grants, sells, and conveys to Grantee and Grantee's successors and
assigns an easement under and across the Easement Property for the Easement Purpose, together
with all and singular the rights and appurtenances thereto in any way belonging (collectively, the
"Easement"), to have and to hold the Easement to Grantee and Grantee's successors and assigns
forever. Granter binds Granter and Grantor's successors and assigns to warrant and forever
defend the title to the Easement in Grantee and Grantee·'s successors and ·assigns against every
person whomsoever lawfully claiming or to claim the Easement or any part of the Easement,
except as to the Reservations from Conveyance and Exceptions to Warranty, to the extent that
such claim arises by, through, or under Granter but not otherwise.·
Terms and Conditions: The following terms and conditions apply to the Easement granted by this
agreement:
I. Character of Easement. The Easement is.nonexclusive and irrevocable. The Easement is
for the benefit of Grantee and Grantee's successors, and assigns (as applicable, the "Holder"). The
Easement granted herein is "in gross" in that there is no benefited property. Nevertheless, the Easement
rights granted herein shall pass to Grantee's successors and assigns, subject to all of the terms hereof.
The Easement shall not be construed in any manner to create or grant any rights to the public generally, to
any other person or entity, or to the owner of any other property to use or enter upon the Easement
Property.
2. Duration of Easement. The term of the Easement will expire when Easement and
Facilities provided for herein are dedicated to the public pursuant to a recorded subdivision plat of the
Easement Property.
3. Reservation of Rights. Holder's right to use the Easement Property is nonexclusive, and
Granter reserves for Granter and Grantor's heirs, successors, and .assigns the right to use all or part of the
Easement Property in conjunction with Holder as long as such use by Granter and Grantor's heirs,
successors, and assigns does not reasonably interfere with the use of the Easement Property by Holder for
the Easement Purpose, and the right to convey to others the right to use all or part of the Easement
Property in conjunction with Holder, as long as such further conveyance is subject to the terms of this
agreement
4. Improvement and Maintenance of Easement Property. Improvement and maintenance
of the Easement Property and the Facilities will be at the sole expense of Holder. Holder has the
reasonable right to cut, trim and control the growth of trees and other vegetation on and in the Easement
Property. Holder must maintain the Easement Property in a neat and clean condition. Holder has the right
to construct, install, maintain, replace, and remove the Facilities under or across any portion of the
Easement Property. All matters concerning the Facilities and their configuration, construction,
installation, maintenance, replacement, and removal are at Holder's reasonable discretion, subject to
performance of Holder's obligations under this agreement.
5. Equitable Rights of Enforcement. This Easement may be enforced by restraining orders
and injunctions (temporary or permanent) prohibiting interference and commanding compliance.
Restraining orders and injunctions will be obtainable on proof of the existence of interference or
threatened interference, without the necessity of proof of inadequacy of legal remedies or irreparable
harm, and will be obtainable only by the parties to or those benefited by this agreement; provided,
{00334593} 2
2i.3
Doc Bk Vol Ps
1:11237852 OR 1283 5 214
however, that the act of obtaining an injunction or restraining order will not be deemed to be an election
ofremedies or a waiver of any other rights or remedies available at law or in equity.
6. Dedication to the Public. Notwithstanding the foregoing, it is agreed that Grantor or the
owner of any part of Grantor's property adjacent to the Easement Property have the right to dedicate any
and all of the Easement Property to a public entity or public utility service provider and/or to convey any
or all of the improvements and facilities constructed within the Easement Property to a public entity or
public utility service provider; provided any such dedication or conveyance shall be subject to the
reservations, terms, conditions and exceptions set forth herein.
7. Attorney's Fees. If any party retains an attorney to enforce this agreement, the party
prevailing in litigation is entitled to recover reasonable attorney's fees and court and other costs.
8. Binding Effect. This agreement binds and inures to the benefit of the parties and their
respective successors and permitted assigns.
9. Choice of Law. This agreement will be construed under the laws of the state of Texas,
without regard to choice-of-law rules of any jurisdiction. Venue is in the county or counties in which the
Easement Property is located.
10. Waiver of Default. It is not a waiver of or consent to default if the nondefaulting party
fails to declare immediately a default or delays in taking any action. Pursuit of any remedies set forth in
this agreement does not preclude pursuit of other remedies in this agreement or provided by law.
11 . Entire Agreement. This agreement and any exhibits are the entire agreement of the
parties concerning the Easement Property and the grant of the Easement by Grantor to Grantee. There are
no representations, agreements, warranties, or promises, and neither party is relying on any statements or
representations of any agent of the other party, that are not expressly set forth in this agreement and any
exhibits.
12. Legal Construction. If any provision in this agreement is for any reason unenforceable,
to the extent the unenforceability does not destroy the basis of the bargain among the parties, the
unenforceability will not affect any other provision hereof, and this agreement will be construed as if the
unenforceable provision had never been a part of the agreement. Whenever context requires, the singular
will include the plural and neuter include the masculine or feminine gender, and vice versa. Article and
section headings in this agreement are for reference only and are not intended to restrict or define the text
of any section. This agreement will not be construed more or less favorably between the parties by reason
of authorship or origin of language.
13 . Notices. Any notice required or permitted under this agreement must be in writing. Any
notice required by this agreement will be deemed to be delivered (whether actually received or not) when
deposited with the United States Postal Service, postage prepaid, certified mail, return receipt requested,
and addressed to the intended recipient at the address shown in this agreement. Notice may also be given
by regular mail, personal delivery, courier delivery, facsimile transmission, or other commercially
reasonable means and will be effective when actually received. Any address for notice may be changed
by written notice delivered as provided herein.
{0033459 3} 3
Bk Vol
OR l.23.?:5
I 4. Recitals. Any recitals in this agreement are represented by the parties to be accurate,
and constitute a part of the substantive agreement.
15. Time. Time is of the essence. Unless otherwise specified, all references to "days" mean
calendar days. Business days exclude Saturdays, Sundays, and legal public holidays. If the date for
performance of any obligation falls on a Saturday, Sunday, or legal public holiday, the date for
performance will be the next following regular business day.
THE ST A TE OF TEXAS
SMILING MALLARD DEVELOPMENT, LTD.
a Texas limited partnership
By: Smiling Mallard Management, LLC
a Texas limited liability company,
its general partner
By:
§ (ACKNOWLEDGMENT)
COUNTY OF BRAZOS §
This instrument was acknowledged before me on the~day of July, 2015, by Paul Clarke,
individually and as Manager of Smiling Mallard Management, LLC, General Partner of SMILJNG
MALLARD DEVELOPMENT, LTD., on behalfofthe partnership.
tl~
Notary Public, State of Texas
{00334593} 4
F's
215
Calldd 17.tl 1 Ac. Troe( 1 of Tract Fovr Sm171ng Ma//arrl ~""'"P"'6nl. ltd. V.8765. P.176 / ' 'I i 11 I J 111 I : 'I : I I , I I 11 ~ I J lo(~ I: I ,,$~'Jo I / a : 11 ~ ~ , 1, I lof/2 I ' ' -'11 ,, -~ ' . ' ' ~ . ' . ' E -------.--r ~ ~ j "' i I JI I ~ ~I ~:sos;..,WMsion 1 I 1 . rar::s SUbdivls1on I I :\! I I d ,8 I ;1 ~ =1J ~ Llndlon ~as• XX! 1 lnd10n Piros• XIV J .:1:.:I ~ J . I ~l:d _J _JI L ) .. ~ l ~ '~L ----"t--_ ----==--:::: .::::: --~ I L --==-:::-~-::--l/; -=-=----==---:----.__/ ~ -' ' :-o--": p* oc. +' b 75'"-0.11'. ~·"·"1_ -----------=----------------------------------1 -----~-------------~---,. ... ..•. ' -----------, ' ' ------'0 ' ' . . a e £aSt9ment ' / Public Dram! 1 625. 1 sq. ff. I o 0373 Acres ' 1 . P.0.8 1 I I I ~ ~ 18.JO-f Acn. Pav! Clarks V.12.JJO. P.2U ==~ ii ,, ..,, l f • 3 .§~~ I •n. E 16. 66 ACY?s (Troct 1 of Tract TWo) Smmng Matlani °"""lopmonf, ltd. V.8765. P.176 J:;I ~'° :s ;1; I b~ o :r-f5 I 16.725 Acn.s (Tract T!i~s} Sn117in9 Mo/lani Oo..,/apmont ltd. V.8765. P. 176 I I I I I I -------Scale: 1"-120' ;, L ________________ 1 _________ ~----. -------------------- -----¥------------------------~Jo":-Wlde EO'S~;.nt--------'l I V..2ge. P.2<4-6 {No Infrastructure} I The record bearing• ond ocluol m•asurod :;~°!!f,: ;~as': !t'"~,:,00 LoJ:5 ;~~tt.~ ware used as the boafe of the bearing •y.tem shoW"n on thfe pfol LINE L1 L2 LJ L4 L5 UNE TABLE BEAAINQ OIST#ICE N J1r35·55· W 113.25" S 2'24-'28" E 25.oo· S 8TJ5'J2" W "5.00' N 2·2ne· w 2~.00· H er35·32• E 65.00' LEGEND 0 -1/2• fron Rod found P.0.8. -Bulldtng Setback Une P.0.C. -Point of Commencing P.D.E. -Pubflc Drolna99 £anment P.U.E. -Public UUfll;y Eoeement ·=· r.:; m x I llJ =i )> 10620048-003-02 •·. C.l ..... 0 Page 1 of gn Texas 77845 • (979) 693-3838 MqCLURE & BROWNE ENGINEER/NG/SURVEY/NG, INC• 1008 Woodcreek Drive, Suite 103 • Cof!ege Station, •.::li:tt :?:1 ::7 .~ t ... ) (t) <:: (•J 0 •:.11 ....._. t .... l -'tJ t-., IJ) 1:t-.
•
EXHIBIT "A"
FIELD NOTES
PUBLIC DRAINAGE EASEMENT
0.0373 ACRES
Doc
0 ll~~/'852
Page 2 of2
Being all that certain tract or parcel of land lying and being situated in the J. M. BARRERA SURVEY,
Abstract No. 69, Brazos County, Texas and being part of the called 17.41 acre Tract 1 of Tract Four
described in the deed from Partners in Habitat Preservation, LLC to Smiling Mallard Development Ltd.
recorded in Volume 8765, Page 176 of the Official Records of Brazos County, Texas (O.R..B.C.) and
part of the 18.304 acre tract described in the deed from Brierpatch, Ltd. to Paul Clarke recorded in
Volume 12330, Page 214 (O.R..B.C.), and being more particularly described as follows:
COMMENCING: at a found 112-inch iron rod marking the northwest comer of the said 18.304 acre
tract, the southwest comer of a 30-foot wide easement described in Volume 296, Page 248 of the Brazos
County Deed Records (B.C.D.R..) and being in the east line of the called 17.41 acre tract, from whence a
found 112-inch iron rod marking the northeast comer of the called 18.304 acre tract bears N 87° 34'
37" Eat a distance of 398.74 feet for reference;
THENCE: N 39° 35' 55" W into the interior of the said 18.304 acre tract for a distance of 83.25 feet to
the POINT OF BEGINNING;
THENCE: S 02° 24' 28" E for a distance of25.00 feet for comer;
THENCE: S 87° 35' 32" W, at 50.31 feet cross the west line of the said 18.304 acre tract, continue into
the interior of the called 17.41 acre tract for total distance of 65.00 feet for comer;
TIIENCE: N 02° 24' 28" W for a distance of25.00 feet for comer;
For further information see strrVey
plat prepared with this description.
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217
CASE NO.: i v::)'
FOR OFFICE1 U_§,§ gONLlY
DATE SUBMITTED: (JJ ··IG TIME:~~· ?>
STAFF·
C ITY OF Coll.EGE STATION
Home of Texas A&M University" ~~------
FINAL PLAT APPLICATION
(Check one) D Minor
($700)
D Amending
($700)
[g] Final
($932)
D Vacating
($932)
0Replat
($932)
Is this plat in the ET J? ~ Yes D No Is this plat Commercial D or Residential [g]
MINIMUM SUBMITTAL REQUIREMENTS:
~ $700-$932 Final Plat Application Fee (see above).
D $233 Waiver Request to Subdivision Regulations Fee (if applicable).
D $600 (minimum) Development Permit Application I Public Infrastructure Review and Inspection Fee. Fee is
1 % of acceptable Engineer's Estimate for public infrastructure, $600 minimum (if fee is > $600, the balance is
due prior to the issuance of any plans or development permit).
~ Application completed in full. This application form provided by the City of College Station must be used and
may not be adjusted or altered. Please attach pages if additional information is provided.
~ Six (6) folded copies of plat. (A signed mylar original must be submitted after approval.)
~ Two (2) copies of the grading, drainage, and erosion control plans with supporting drainage report.
~ Two (2) copies of the Public infrastructure plans and supporting documents (if applicable).
D Copy of original deed restrictions/covenants for replats (if applicable).
~ Title report for property current within ninety (90) days or accompanied by a Nothing Further Certificate
current within ninety (90) days. The report must include applicable information such as ownership, liens,
encumbrances, etc.
~ Paid tax certificates from City of College Station, Brazos County and College Station l.S.D.
~ The attached Final Plat checklist with all items checked off or a brief explanation as to why they are not.
NOTE: A mylar of the approved preliminary plan must be on file before a final plat application will be considered
complete. If the mylar is submitted with the final plat application, it shall be considered a submittal fo r the
preliminary plan project and processed and reviewed as such. Until the mylar has been confirmed by staff
to be correct, the final plat application will be considered incomplete.
Date of Optional Preapplication or Stormwater Management Conference .:...;N;;...;.YA--'----------------
NAME OF PROJECT Indian Lakes -Phase 21
ADDRESS Near intersection of Mesa Verde Drive and Kachina Cove ·
SPECIFIED LOCATION OF PROPOSED PLAT:
Near intersection of Mesa Verde Drive and Kachina Cove
APPLICANT/PROJECT MANAGER'S INFORMATION (Primary contact for the project):
Name Travis Martinek E-mail travis@clarkewyndham.com
3608 East 29th Street, Suite 100 Street Address
City Bryan State Texas Zip Code _7_78_0_2 ___ _
Fax Number (979) 846-1461 Phone Number (979) 846-4384 .;,.____.:__ _____________ _
Revised 4/14 Page 1 of 9
PROPERTY OWNER'S INFORMATION (All owners must be identified. Please attach an additional sheet fo r multiple
owners):
Name Smiling Mallard Development, Ltd. E-mail travis@clarkewyndham.com
--------~
Street Address 3608 East 29th Street, Suite 100
City Bryan State Texas Zip Code 77802 ------
Phone Number (979) 846-4384 Fax Number (979) 846-1461
---------------~ --------~
ARCHITECT OR ENGINEER'S INFORMATION:
Name McClure & Browne EngineeringlSuNeying, Inc. E-mail Jeffr@mcclurebrowne.com ---------
Street Address 1008 Woodcreek Drive, Suite 103
City College Station State Texas Zip Code 77845 ------
Phone Number (979) 693-3838 Fax Number (979) 693-2554 --------------------------
Do any deed restrictions or covenants exist for this property? [g] Yes 0 No
Is there a temporary blanket easement on this property? If so, please provide the Volume __ N._YA __ and Page No. ---NIA
Total No. of Lots 12 ------R-0-W Acreage _2._7_7_8 ____ _ Total Acreage _2_2._9_63 ______ _
Existing Use _v_a_ca_n_t ___________ _ Proposed Use Single-Family Residential ---------
Number of Lots By Zoning District NIA NIA NIA I NIA NIA I NIA
Average Acreage Of Each Residential Lot By Zoning District:
NIA NIA NIA NIA NIA NIA NIA NIA
Floodplain Acreage _o_.o_o_o _______________________________ _
Is there Special Flood Hazard Area (Zone A or Zone AE on FEMA FIRM panels) on the property? I Yes l'X No
This information is necessary to help staff identify the appropriate standards to review the application and will be used to
help determine if the application qualifies for vesting to a previous ordinance. Notwithstanding any assertion made,
vesting is limited to that which is provided in Chapter 245 of the Texas Local Government Code or other applicable law.
Is this application a continuation of a project that has received prior City platting approval(s) and you are requesting the
application be reviewed under previous ordinance as applicable?
l'X Yes
I No
If yes, provide information regarding the first approved application and any related subsequent applications (provide
additional sheets if necessary):
Project Name: Indian Lakes Subdivision
City Project Number (if known): Unknown
Date I Timeframe when submitted: 2000
Revised 4/14 Page 2 of 9
A statement addressing any differences between the Final Plat and Preliminary Plan (if applicable):
Re uested waiver to subdivision re ulations and reason for same if applicable):
Y'A
Regarding the waiver request, explain how:
1. There are special circumstances or conditions affecting the land involved such that strict application of the
subdivision re ulations will deprive the a licant of the reasonable use of his land .
Y'A
2. The waiver is necessary for the preservation and enjoyment of a substantial property right of the applicant. YA ~~~~
3. The granting of the waiver will not be detrimental to the public health, safety, or welfare, or injurious to other
property in the area, or to the City in administering subdivision regulations.
YA
4. The granting of the waiver will not have the effect of preventing the orderly subdivision of other land in the area in
accordance with the provisions of the Unified Development Ordinance.
Y'A
Fee in lieu of sidewalk construction is being requested because of the following condition (if applicable):
1. I An alternative pedestrian way or multi-use path has been or will be provided outside the right-of-way;
2. L The presence of unique or unusual topographic, vegetative, or other natural conditions exist so that strict
adherence to the sidewalk requirements of the UDO is not physically feasible or is not in keeping with the
purposes and goals of the UDO or the City's comprehensive Plan;
3. I A capital improvement project is imminent that will include construction of the required sidewalk. Imminent shall
mean the project is funded or projected to commence within twelve (12) months;
4. I Existing streets constructed to rural section that are not identified on the Thoroughfare Plan with an estate I
rural context;
5. I When a sidewalk is required along a street where a multi-use path is shown on the Bicycle, Pedestrian , and
Greenways Master Plan ;
Revised 4/14 Page 3 of 9
6. I The proposed development is within an older residential subdivision meeting the criteria in Platting and
Replatting within Older Residential Subdivisions Section of the UDO; or
7. I The proposed development contains frontage on a Freeway I Expressway as designated by Map 6.6,
Thoroughfare Plan -Functional Classification, in the City's Comprehensive Plan.
Detailed explanation of condition identified above:
N/A
NOTE: A waiver to the sidewalk requirements and fee in lieu of sidewalk construction shall not be considered at the
same time by the Planning & Zoning Commission.
Total Linear Footage of
Proposed Public:
NIA Streets
NIA Sidewalks
NIA Sanitary Sewer Lines
NIA Water Lines
NIA Channels
NIA Storm Sewers
NIA Bike Lanes I Paths
Parkland Dedication due prior to filing the Final Plat:
ACREAGE:
NIA
NIA
NIA
NIA
No. of acres to be dedicated+$ __ N_'f,_f'.l __ development fee
No. of acres in floodplain
No. of acres in detention
---No. of acres in greenways
OR
FEE IN LIEU OF LAND:
NIA No. of SF Dwelling Units X $ NIA = $ NIA
NIA (date) Approved by Parks & Recreation Advisory Board ----
NOTE: DIGITAL COPY OF PLAT MUST BE SUBMITIED PRIOR TO FILING.
The applicant has prepared this application and certifies that the facts stated herein and exhibits attached hereto are
true, correct, and complete. IF THIS APPL/CATION IS FILED BY ANYONE OTHER THAN THE OWNER OF THE
PROPERTY, this application must be accompanied by a power of attorney statement from the owner. If there is more
than one owner, all owners must sign the application or the power of attorney. If the owner is a company, the application
must be accompanied by proof of authority for the company's representative to sign the application on its behalf LIEN
HOLDERS identified in the title report are also considered owners and the appropriate signatures must be provided as
described above.
Sign~p] Date
Revised 4/14 Page 4 of 9
Existing
~
FINAL PLAT MINIMUM REQUIREMENTS
(ALL CITY ORDINANCES MUST BE MET)
INCLUDING BUT NOT LIMITED TO THE FOLLOWING:
(Requirements based on field survey and marked by monuments and markers.)
~ Drawn on 24" x 36" sheet to scale of 100' per inch.
[gj Vicinity map which includes enough of surrounding area to show general location of subject property in
relationship to College Station and its City Limits. No scale required but include north arrow.
~ Title Block with the following information:
~ Name and address of subdivider, recorded owner, planner, engineer and surveyor.
~ Proposed name of subdivision. (Subdivision name & street names will be approved through Brazos
County 911.)
[g] Date of preparation.
~ Engineer's scale in feet.
~ Total area intended to be developed.
~ North Arrow.
~ Subdivision boundary indicated by heavy lines.
~ If more than 1 sheet, an index sheet showing entire subdivision at a scale of 500 feet per inch or
larger.
~ All applicable certifications based on the type of final plat.
~ Ownership and Dedication
~ Surveyor and/or Engineer
~ City Engineer (and City Planner, if a minor plat)
~ Planning and Zoning Commission (delete if minor plat)
~ Brazos County Clerk
~ Brazos County Commissioners Court Approval (ET J Plats only)
~ If submitting a replat where there are existing improvements, submit a survey of the subject property
showing the improvements to ensure that no encroachments will be created.
~ If using private septic systems, add a general note on the plat that no private sewage facility may be
installed on any lot in this subdivision without the issuance of a license by the Brazos County
Health Unit under the provisions of the private facility regulations adopted by the Commissioner's
Court of Brazos County, pursuant to the provisions of Section 21 .084 of the Texas Water Code.
~ Location of the 100-Year Floodplain and floodway, if applicable, according to the most recent available
data.
~ Lot corner markers and survey monuments (by symbol) and clearly tied to basic survey data.
~ Matches the approved preliminary plan or qualifies as minor amendments (UDO Section 3.3.E.2).
The location and description with accurate dimensions, bearings or deflection angles and radii , area, center
angle, degree of curvature, tangent distance and length of all curves for all of the
following : (Show existing items that are intersecting or contiguous with the boundary of or forming a
boundary with the subdivision, as well as, those within the subdivision).
Proposed
~ Streets. Continuous or end in a cul-de-sac, stubbed out streets must end into a temp
turn around unless they are shorter than 100 feet.
Public and private R.O.W. locations and widths. (All existing and proposed R.O.W.'s
sufficient to meet Thoroughfare Plan.)
Street offsets and/or intersection angles meet ordinance.
Revised 4/14 Page 8 of 9
Existing
~
~
~
~
Proposed
~
~
~
~
Alleys.
Easements.
A number or letter to identify each lot or site and each block (numbered sequentially ).
Parkland dedication/greenbelt area/park linkages. All proposed dedications must be
reviewed by the Parks and Recreation Advisory Board and documentation of their
recommendation provided prior to being scheduled for P&Z Commission consideration.
~ Construction documents for all public infrastructure drawn on 24" x 36" sheets and properly
sealed by a Licensed Texas Professional Engineer that include the following :
~ Street, alley and sidewalk plans, profiles and sections. One sheet must show the overall
street, alley and/or sidewalk layout of the subdivision. (may be combined with other
utilities).
~ Sewer Design Report.
~ San itary sewer plan and profile showing depth and grades. One sheet must show the
overall sewer layout of the subdivision. (Utilities of sufficient size/depth to meet the utility
master plan and any future growth areas.)
~ Water Design Report and/or Fire Flow Report.
~ Water line plan showing fire hydrants, valves, etc. with plan and profile lines showing
depth and grades. One sheet must show the overall water layout of the subdivision.
(Utilities of sufficient size/depth to meet the utility master plan and any future growth
areas.)
~ Storm drainage system plan with contours, street profile, inlets, storm sewer and
drainage channels, with profiles and sections. Drainage and runoff areas, and runoff
based on 5, 10, 25, 50 and 100 year rain intensity. Detailed drainage structure design,
channel lining design & detention if used. One sheet must show the overall drainage
layout of the subdivision.
~ Detailed cost estimates for all public infrastructure listed above sealed by Texas P.E.
[2] Letter of completion for public infrastructure or guarantee I surety in accordance with UDO
Section 8.6.
~ Drainage Report with a Technical Design Summary.
~ Erosion Control Plan (must be included in construction plans).
~ All off-site easements necessary for infrastructure construction must be shown on the final plat with a
volume and page listed to indicate where the separate instrument easements were fil ed.
Separate instrument easements must be provided in recordable form to the City prior to being scheduled
for P&Z Commission consideration.
[2] Are there impact fees associated with this development? D Yes [2J No
Impact fees must be paid prior to building permit.
~ Will any construction occur in TxDOT rights-of-way? D Yes l2J No
If yes, TxDOT permit must be submitted along with the construction documents.
NOTE: 1. We will be requesting the corrected Final Plat to be submitted in digital form if available prior to filing
the plat at the Courthouse.
2. If the construction area is greater than 5 acres, EPA Notice of Intent (NOi) must be submitted prior to
issuance of a development permit.
"'Printr9rm
Revised 4/14 Page 9 of 9
McCLURE & BROWNE, ENGINEERING/SURVEYING, INC.
October 27, 2015
Mr. Kevin Ferrer
1008 Woodcreek Or., Suite 103 ·College Station, Tx. 77845 · (979) 693-3838
1314 10th Street, Suite 210 ·Huntsville, Tx. 77320 · (936) 294-9749
Graduate Engineer
City of College Station
Post Office Box 9960
College Station, TX 77842
Re.: Fire Hydrant As Built Flow Test
Indian Lakes Phase 21
MBESI No. 1062-0048
Dear Mr. Ferrer:
Engineer Reg. No. F-458
Survey Reg. No. 101033-00
I witnessed the Wellborn Water representatives perform a fire hydrant flow test in accordance
with NFPA 291 standards on the new fire hydrants in Indian Lakes Phase 21 th is afternoon. The
following are the results of that test:
STATIC HYDRANT LOCATION: Chaco Canyon Drive/ Makawee Court intersection
FLOW HYDRANT LOCATION: Makawee Court
STATIC PRESSURE GAUGE: 92 psi
RESIDUAL PRESSURE GAUGE: 42 psi
NOZZLE SIZE: 2.5"
DISCHARGE COEFFICIENT: 0.90
FLOWRATE FORMULA: Q=29.84cd2p0·5
C = discharge coef.
D = orifice size (in)
P = pitot pressure (psi)
CALCULATED FLOWRATE: 1,088 gpm @ 42 psi
Based on this information, the new water system meets the standards of College Station.
Please let me know if you have any questions.
Sincerely,
,.Travis Martinek
From:
Sent:
To:
Stephen Cast [wsud.sc@verizon.net]
Tuesday, October 20, 2015 8:33 AM
Travis Martinek
Subject: RE: Indian Lakes -Phase 21
Travis,
Wellborn Special Utility District has inspected and approved Phase 21, Indian Lakes.
Stephen Cast
Wellborn Special Utility District
From: Travis Martinek [mailto:tmartinek@clarkewyndham.com]
Sent: Monday, October 19, 2015 2:44 PM
To: Stephen Cast <wsud.sc@verizon.net>
Subject: Indian Lakes -Phase 21
Stephen,
We are planning to file the plat for Indian Lakes Phase 21 this week. The City needs you to confirm that you accept the
waterlines into your system. Can you reply to this email stating your acceptance?
I've attached the water bacteria test and the construction plans for your records.
Thanks!
Travis Martmek
Clarke & Wyndham, Inc.
3608 East 29th Street, Suite 100
Bryan, Texas 77802
Office: (979) 846-4384
Fax: (979) 846-1461
Mobile: (979) 229-9877
1
TCEQ MICROBIAL MONITORING FORM ~~·~ Brazos County Heallh Department 1: The NELAC Institute
(;/t.'5f.J. ~ub1i~1e-w~~ _;;¥.Sf~in_ 1<1e~11~ti0n~&~sa:_mp1_e_ c;ouectio~ 1~tO:rmatio~ {Pi~~:t:Y~ 2..r~~~!'?ci<:P.r!'!t~·~ f bii.wttl:;.. ~ 201 North Texas Avenue
Public Water System ID: 0 16 \ljq -~ Biyan, TX 77803 l TCEQ Certificate t:
(Must be 7 ~ n:tude all zeros) ;;...._ } 0 0 l 979-361-5738; Fax: 979-823-2275 -~ T104704299
Public Water System ~-~ TestresultsmtttaU
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-~~~-2) lnsulfocient volume 14) Heavy silt/lurllidily 1><esent. 6) Other.
Item II I
1
2
-3
4
5
6
7
8 ---9
10
11
12
13
14 ·--15
16
17 -18
19
20 -21
22
23 -24
25
26
27
28
Indian Lakes Phase 21
MBESI PROJ#: 1062-0048
Engineer's Opinion of Probable Construction Costs
March 17, 2015
Description Unit Quanlily Unit Price
Paving Construction
Site Preparation (includes clearing ~J:rubbing) Ac. 4.00 $1,500.00 -Earthwork (Excavation nnd Embankment for Public ROW, L.S. _Common Ar~ and Lots +/-8,200 CYJ 1 $58,500.00
6" Lime Stabilized Subgrnde (6% by weight) S.Y. 6,~36 $4.25
6" Crushed Stone Base S.Y. 4,005 $12.00 •¥•-···· 8" Crushed Stone Base SY. 2,453 $13.00
2" HMAC Pavement S.Y. 4,970 $12.00 -Paving Subtotal
D . S t C rarna~e 1ys em onstruction
24" RCP Pipe,_(A§.TM C-76 CL Ill) (Structural Backfill) L.F. 50 $55.00
30" RCP Pipe, (ASTM C-76 CL Im (Structural Backfill} L.F. 96 $90.00
R~ckRipRap S.Y. 116 $40.00 -Safetv End Treatment for 24" RCP EACH 4 $900.00
Safety End Tre'~bnent for 30" RCP -EACH 4 $1250.00
Drainage System Subtotal
w s c a tcr iystCJil onstruction
8" PVC, C909 Cl 200, Water Line, L.F. 578 $27.00
6" PVC, g909 Cl 200, Water Line L.F. 656 $25.00
4" PVC, C909 Cl 200, Water Line L.F. 393 :t21.00
12" PVC Casing L.F. 50 $60.00 -6" M.J. Gate Valve EACH 1 $1,100.00
8" M.J. Gate Valve EACH 1 $1,200.00
8"x6" M.J. Tee EACH 1 $450.00 -·--·· 8" M.J. Anchor Couelin!l EACH 1 $350.00
6" M.J. Anchor Coupling EACH 2 $350.00
6"x4" M.J. Reducer EACH 1 $350.00
Fire IJJ.drant Assembly EACH 2 $3,600.00
Blow-off Assembly EACH 2 $1,000.00
Water Service, 1.5" type~ Copper, long side(> 20') EACH 3 $1,500.00
-·-Water System Subtotal
Erosion Conn·ol Construction
Erosion Control Plan & Sedimentation Control (per Item LS. l $4,000.00 106) (includes monitorim!. record keeoi11g,2!!~ cleanup)
Grass Seeding SY 8,952 $0.36
Headwall Protection EACH 4 $200.00
Ent.ranee/Exit EACH 1 $1,500.00
Erosion Control Subtotal
Construction Cost!
Total
$6 000.00
$58,500.00
$29,053.00
$48,060.00
$31,889.00
$59,640.00
$233,142
$2,750.00
$8,640.00
$4,640.00
$3,600.00
$5,000.00
$24,630
$15,606.00
$16,400.00
$8,253.00
$3,000.00
$1 l.QQ.00
$1,200.00
$450.00
$350.00
$700.00
$350.00
$7 200.00
$2,000.00
$4 500.00
$61,109
$4,000.00
$3,22~72
$800.00
$1,500.00
$9,523
$328,404
The above con~1rnction estimate is based on the engineer's preliminary opinion of probable constrnction costs. This estimate
constitutes our best judgment at this time. Please note that the engineer does not have any control over contractor or supplier
workloads and the degree to which inflation may affect project costs between now and the bid date. During construction,
additional features may become apparent as the work progresses, which will result in an increase in cost.
1 of2
/
INDIAN LAKES PHASE 21 -FINAL PLAT ·
RESPONSE TO STAFF REVIEW COMMENTS NO. 1
PLANNING
1. The Applicant intends to allow lot owners to choose where they wish to take access. Chaco
Canyon is not an arterial street; therefore, driveway access to this street is permitted. Please
note that the lots in Phase 20, as shown on the approved Prelim inary Plat, will be required to take
access from Chaco Canyon.
2. No comment.
3. No comment.
4. No comment.
ENGINEERING
1. See revised Final Plat.
2. See revised Final Plat.
3. This note has not been added. It is up to the builder, homeowner, and their engineer to
determine the requirements for the slab of the house in this subdivision since no building permits
will be required through the City of College Station. Additionally, no lots are intended to have fill
in excess of 2 feet.
4. See revised Final Plat.
5. A temporary utility easement will be provided and filed of record prior to the recording of the Final
Plat. A permanent utility easement will be provided with the Final Plat for Phase 20.
6. See revised construction plans.
7. See revised construction plans. The waterline was extended 5 feet past the common lot
boundary for Lots 5 and 6.
8. See revised drainage report.
9. See revised drainage report.
10. See revised drainage report.
11 . See attached cost estimate and revised construction plans.
SANITATION
1. No comment.
3/18/2015 Page 1 of 1
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CITY OF Coll.EGE STATIO
Home of Texas A&M University'
FOR OFFICE USE ONLY
CASE NO.: [I? :l-01>' ';OfJO II
DATE SUBMITTED: 'J_,/[b:f'
TIME: f 1: l/l/ '
STAFF: &,.St
PLANNING & DEVELOPMENT SERVICES
TRANSMITTAL LETTER
Please check one of the options below to clearly define the purpose of your submittal.
0 New Project Submittal
O Incomplete Project Submittal -documents needed to complete an application. Case No.:
• Existing Project Submittal. Case No.: =14. /b:-/€'"I/
Project Name Ll~" fAfte$ /Ac,.~ ZJf
Contact Name c J6f~ ~~
We are transmitting the following for Planning & Development Services to review and comment (check all that apply):
0 Comprehensive Plan Amendment
0 Rezoning Application
O Conditional Use Permit
0 Preliminary Plan
JJ Final Plat
0 Development Plat
0 Site Plan
0 Special District Site Plan
O Special District Building I Sign
0 Landscape Plan
0 Non-Residential Architectural Standards
0 Irrigation Plan
0 Variance Request
0 Development Permit
0 Development Exaction Appeal
0 FEMA CLOMA/CLOMR/LOMA/LOMR
0 Grading Plan
0 Other -Please specify below
INFRASTRUCTURE AND ENGINEERING DOCUMENTS
A ll infrastructure documents must be submitted as a complete set.
The following are included in the complete set:
0 Comprehensive Plan Amendment 0 Waterline Construction Documents
0 TxDOT Driveway Permit 0 Sewerline Construction Documents
0 TxDOT Utility Permit 0 Street Construction Documents
0 Drainage Letter or Report 0 Easement Appl ication
0 Fire Flow Analysis 0 Other -Please specify
Special Instructions:
10/10 Print Form
/
TO:
CLARKE & WYNDHAM
REAL ESTATE INVESTMENT SERVICES
Mark Bombek
TRAVIS MARTINEK
3608 East 29th Street, Suite 100
Bryan, Texas 77802
Office: (979) 846-4384 Fax: (979) 846-1461 Celi: (979) 229-9877
TRANSMITTAL SH E ET
DATE:
3/18/2015
COMPANY: TOTAL NO. OF PAGES INCLUDING COVER:
CS Ping & Dvlpmt Serv See below
FAX NUMBER: PHONE NUMBER:
RE :
Indian Lakes-Phase 21 Final Plat and Construction Plans
0 URGENT 0 FOR REVIEW 0 PLEASE COMMENT 0 PLEASE REPLY 0 PLEASE RECYCLE
NOTES/COMMENTS:
Attached are the following:
• Response to staff comments
• 1 -2 4"x36" copy of the revised Final Plat
• 1 -24"x36" copy of the revised construction plans
• 1 -copy of the revised drainage report
co!:T cf711hA7'€