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October 5, 2009
Mr. Alan Gibbs, P.E.
City of College Station
Department of Development Engineering
1101 Texas Avenue
College Station, Texas 77840
Re: HEB College Station No. 2 Grocery Store
Lot 12, Block 3, Phase 3 Tower Point Subdivision
West Quadrant State Highways 6 and 40, College Station Texas 77845
Drainage Letter
Dear Mr. Gibbs:
Project No.: 50001 -504
We submit this letter as a component of the Site Plan and Development Permit Applications for the
College Station No. 2 store project proposed within the Tower Point Subdivision. The proposed
improvements include installation of privately maintained utilities to support the development, an
87,738 SF grocery store with limited retail space, fuel center, automated carwash, and parking field
within Lot 12, Block 3 of this subdivision. The proposed improvements are consistent with the
Developer's Master Plan and the Preliminary Storm Water Drainage Report for the development as
prepared by William P. Moore & Associates.
Several privately maintained storm water drainage systems will be provided within the ± 12.5 -acre
development to collect surface runoff and covey the discharge to storm sewer inlets as identified in
the Development's Drainage Area Map. All internal storm sewers for this property will be designed
in accordance with the Unified Storm Water Design Guidelines contained within the Site Design
Standards Manual of the City of Bryan and the City of College Station. All storm sewer pipes and
inlets will be designed in accordance with the standards to convey storm water runoff for the 10 -year
storm design event using a minimum time of concentration of 10 minutes.
The grading plan for HEB's property respects the overall development's drainage divides resulting in
the conveyance of runoff from this parcel in accordance with the Master Drainage Plan.
Approximately 9.2 acres of impervious cover is proposed within the development of this parcel,
resulting in an impervious cover value of 0.75 for Lot 12 of Tower Point Subdivision. We do not
anticipate any adverse affects to the downstream developments since the post - development storm
BURY +PARTNERS -SA, INC.
922 Isom Road, Suite 100
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TEL (210) 525 -9090
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ENGINEERING SOLUTIONS
water runoff for this lot will not exceed the 10 -year storm event design flow presented in the Tower
Point Subdivision Preliminary Storm Water Drainage Report.
Should you have any questions, do not hesitate to contact this office.
Sincerely,
Mark R. Jo
Principal /S. nior ,'roject Manager
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Mr. Alan Gibbs
October 5, 2009
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