HomeMy WebLinkAboutSanitary Sewer Report Sanitary Sewer Report
for
Tower Point Infrastructure Development
Phase 10A, Lots 4, 5, & 6, Block 3
College Station, Texas
Prepared for:
Weiner Development Corporation
Prepared by:
Walter P. Moore & Associates, Inc.
1301 McKinney, Suite 1100
Houston, TX 77010
TBPE Firm Registration No. 1856
January 4, 2012
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TABLE OF CONTENTS
SANITARY SEWER OVERVIEW 2
PROJECT DESCRIPTION 2
SANITARY SEWER ANALYSIS 3
CONCLUSION 4
APPENDIX 5
SANITARY SEWER OVERVIEW
Introduction
The sanitary sewer line is to serve Tower Point Subdivision Phase 10A, Lots 4, 5, & 6, Block 3
located in College Station Texas.
The sanitary sewer has been prepared in general conformance with the requirements of
College Station and TxDOT.
The purpose of the report is to verify adequate capacity of the proposed sanitary sewer line for
the drainage area discharging into the system for the restaurant and commercial development.
This sanitary sewer analysis consists of this narrative plan, the accompanying exhibits included
in the appendices.
PROJECT DESCRIPTION
Location and Outfall Information
The site is located is at approximately Latitude 30° 33' 48" N and Longitude 96° 15' 57" W
determined using the USGS map. The site is located in the Wellborn SE Quadrangle Brazos
County, Texas. The site slopes from south to north across the property.
Existing Conditions
The site of the project is located approximately 1600 feet from the northwest corner of the
intersection of Highway 6 and Highway 40 in College Station, Texas. The site is bounded by
Highway 6 to the east, Private Drive "A" to the south, and the detention Area of Phase 14, Lot
4, Block 2 on the west and north.
The project size is approximately 4.21 acres in size and is currently not developed. The site
consists of primarily rocky soil with minimal vegetation.
Sanitary Sewer Report
Tower Point Infrastructure Development— Phase 10A, Lots 4 -6, Block 3 Page 2
Proposed Site Conditions
Proposed development consists of a restaurant and commercial retail shops with associated
parking, drives, sidewalk, and landscaping. The public infrastructure being constructed
consists of new private roadways, public water mains, public storm sewer systems, and public
sanitary sewer systems. The public sanitary sewer will be within a variable width public utility
easement and it will be connected to an existing manhole on an existing 10" sanitary sewer
located in Private Drive "A ", west of Highway 6 and south of Arrington Road. The new sanitary
will serve future development on lots 4, 5, and 6 (See Exhibit 1).
SANITARY SEWER ANALYSIS
Existing Analysis
The existing sanitary manhole on an existing 10" sanitary sewer located in Private Drive "A ",
south of Arrington Road and approximately 285' southwest of Highway 6 will be the point of
connection and will be collecting Lots 4, 5, and 6, which is approximately 4.21 acres of
commercial development (See Exhibit 2). The existing 10" sanitary sewer system south of
Arrington Road has a maximum peak hourly flow of 7.76x10 ^5gpd or 1.20cfs and slopes to
the southwest away from Highway 6.
Proposed Analysis
The proposed sanitary sewer velocity and capacity calculations are shown in the appendix.
The proposed sanitary sewer drainage area discharging to the existing system is analyzed
below:
A =2.0 acres (Lot 4) & 0.75 acres (Lot 5) & Restaurant =4266 sf (Lot 6)
Capita =30 persons /acre
Retail =25gpd /cap
Restaurant= 600gpd /1000 sf
Design (6" PVC) _> 0 Average Daly Flow = 2,062.50 gpd + 2559.60 gpd = 4622.10 gpd
Sanitary Sewer Report
Tower Point Infrastructure Development— Phase 10A, Lots 4 -6, Block 3 Page 3
Q Peak Hourly Flow = ( Average Daily Flow ) * ( 4 )
Q Peak Hourly Flow = 18,488.40 gpd or 0.03 cfs
CONCLUSION
The existing 10" sanitary sewer system has adequate capacity to handle the new sanitary
sewer flows discharging to the existing system at the existing sanitary manhole connection
point located north of Arrington Road and approximately 380' west of Highway 6. The sanitary
sewer extension will serve Lots 4, 5, and 6, which is approximately 4.21 acres of commercial
development.
Sanitary Sewer Report
Tower Point Infrastructure Development— Phase 10A, Lots 4 -6, Block 3 Page 4
APPENDIX
Exhibit 1 Sanitary Sewer Layout
Exhibit 2 Proposed Sanitary Sewer Drainage Area
Exhibit 3 Tower Point Phase 10A, Lots 4 -6, Block 3 Sanitary Sewer Design Calculations
Sanitary Sewer Report
Tower Point Infrastructure Development— Phase 10A, Lots 4 -6, Block 3 Page 5
EXHIBIT 1
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