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PLANNING & DEVELOPMENT SERVICES
CITY OF COLLEGES'IAF1ON TRANSMITTAL COVER LETTER
Please check one of the options below to clearly define the purpose of your submittal.
r Documents for a previous incomplete submittal
isting Project Submittal
Project Name:~5 to l xr-1S_
Contact Name:5 Phone No.: 1
We are transmitting the following for Planning & Development Services to review and comment.
(Please check all that apply).
F- Comprehensive Plan Amendment
F- Rezoning Application
F- Master Development Plan
F- Preliminary Plat
nal Plat
I- Development Plat
F- Site Plan
F- Special District Site Plan
F- Special District Building / Sign
I- Landscape Plan
f- Non-Residential Architectural Standards
F- Irrigation Plan
F -Variance Request
F- Development Permit
F- Conditional Use Permit
F- FEMA CLOMA/CLOMR/LOMA/LOMR
Grading Plan
F- Other - Please specify below
INFRASTRUCTURE AND ENGINEERING DOCUMENTS
All infrastructure documents must be submitted as a complete set.
The following are included in the complete set: F- Waterline Construction Documents
F- TxDOT Driveway Permit
F_ TxDOT Utility Permit
F Drainage Letter or Report
r Fire Flow Analysis
F Other - Please specify
I
Special Instructions:
29-Aug-08
F- Sewerline Construction Documents
F- Drainage Construction Documents
F' Street Construction Documents
F- Easement Application
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CV
CLR
February 22, 2008
City of College Station
Public Works Department
1101 Texas Avenue
College Station, Texas 77842
Attn: Carol Cotter, Graduate Civil Engineer
Re: Rock Prairie Heights Sanitary Sewer Capacity
Dear Ms. Cotter:
This letter shall serve as our report on the available sanitary sewer capacity of the
existing sanitary sewer serving the referenced proposed development.
The proposed development, which is 17.221 acres, is located at the southeast intersection
of Rock Prairie Road and Old Rock Prairie Road approximately 1, 600 feet east of State
Highway 6 in College Station, Texas. The type of development shall be an apartment
complex with approximately 20 units per acre. C -LT
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The existing sanitary sewer that is available to serve the proposed development is
approximately 1, 170 feet from the development. According to available record drawings/
,a"~ographic information, the sewer is an 8" diameter PVC pipe with a s pe-o
Noe {G-r 0.69%. Using "Mannings" equation, and a coefficient of roughness (n) f 0.01 roPVC,
the capacity of the existing sanitary sewer is 843,320 gallons per day. 14 S G u~ L 1 7
h)1~Gct velUci~l .
(W5 0'~1 J In order to develop the site, approximately 1,096 feet of 8" sanitary sewer, along with a
lift station and force main will be constructed by the developer. The location of the
proposed 8" sanitary sewer is show on the enclosed sketch. Utilizing a slope of .40%, the
capacity of the proposed sanitary sewer is 643,830 gallons per day.
Based on 20 units per acre, 315 gallons per day per unit, and a factor o 0.714 for
apartment flow, the apartment development will generate a flow o 77,600 allons per
day- This is only 14% of the capacity of the proposed 8" sanitary er, eaving 566,230
gallons per day available capacity for future development. (ILA-) ~4 )(6_ 1-1 ZZ~cc
LAA
If you have any questions regarding the information provided, please contact us. /quo
Sincerely,
FW
F.H. (Rick) Ra f rd, PE
Senior Project anager
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ENGINEERS • SURVEYORS • GIS 4~
7600 W. Tidwell, Suite 400, Houston, Texas 77040 SNP
Phone: 713.462.0993 • Fax: 713.462.2732 • Toll Free 800.694.8241 • www.clri.com 1