HomeMy WebLinkAboutSewer Report Impact Study for Oversize Participation for the
Sanitary Sewer System
for
Williams Creek Lake Subdivision
College Station, Texas
November 2014
Prepared By:
Schultz Engineering, LLC
TBPE Firm No. 12327
P.O. Box 11995
College Station, TX 77842
2730 Longmire Drive, Suite A
College Station, Texas 77845
(979) 764-3900 of T
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JOSEPH P. SCNULTZ
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SC`UL1Z ENGINEERING, LLC.
GENERAL INFORMATION
Williams Creek Lake Subdivision is a 71.136-acre development in the area generally bounded by Rock
Prairie Road East to the west and William D. Fitch Parkway to the south. It is zoned Estate and is
comprised of residential land uses as shown on Exhibit A. There are 71 residential lots planned for the
site. The area surrounding the site is undeveloped rural land.
An existing sanitary sewer lift station is provided along William D. Fitch Parkway. This station will
be the outfall of this development.
Design Criteria:
Primary Sewer Outfall: Existing Sanitary Sewer Lift Station by William D. Fitch Parkway
Domestic Demand:
Avg. Pop Density: 2.67 people per lot
Average Flow: 100 gpd/cap or 267 gpd per lot
Peaking Factor: 4
Pipe: PVC D3034 SDR 26
Applicable Exhibits: Exhibit A—Overall Sewer System Layout
Exhibit B—Sanitary Sewer Analysis Spreadsheet
Conclusion:
The sewer system shown in Exhibit A has been laid out using the criteria in the Bryan/College Station
Design Guidelines and TCEQ. It is analyzed assuming peak flow conditions when this portion of the
subdivision is fully developed. The spreadsheet in Exhibit B shows all lines depicted in Exhibit A to
be capable of carrying the flows that come to them under these conditions. This analysis will be used
as the basis for all subsequent sewer line designs in the subdivision. The system will function as
intended as long as the line sizes and slopes are equal to or greater than those shown herein.
Oversize Participation:
The proposed sanitary sewer system meets the Bryan/College Station Design Guidelines and will
provide service to this subdivision with the construction of the proposed 8" line to the existing
manhole located near the lift station. Construction of a line greater than 8" in diameter can be
achieved by the City of College Station participating in the cost for the increased pipe size.
EXHIBIT A
Overall Sewer System Layout