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r ❑ Kimley-Horn
and Associates, Inc.
■
Suite 105
111 University Drive East
Technical Memorandum .10" College Station,Texas
...OF TF•C% 77840
To: City of College Station • •' 1 :S'
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in
From: J. Chris Han-is, P.E. �J.HRIS HARRIS j
N.MN•.........••.....
IV.% 94859 I
Date: June 13, 2008
Subject: 2818 Place Student Housing Phase II • �/
Sanitary Sewer Analysis `/ Mb.Project No. 064311010 "48/110-
D6./3' 56
2818 Place is a new student housing development located near 1300 Harvey
Mitchell Parkway in College Station, Texas. This proposed development is the
second of two phases, located on approximately 23 acres. This technical
memorandum addresses sanitary sewer capacity for the proposed sanitary sewer
mains for the second phase of this development. Analysis of phase 1 sanitary sewer
mains is not included in this analysis.
Design Criteria
There are three sanitary sewer mains proposed on the subject site. All sanitary
sewer mains have been designed in accordance with the BCS Unified Design
Guidelines and City of College Station standard specifications. Flow calculations
were performed using Method 1 — Fixture Count Determination as provided by the
Mechanical/Electrical/Plumbing engineer for the development. An exhibit showing
demands at each building is attached to this memorandum. Capacities of the
sanitary lines were determined using Mannings formula for each segement between
connections.
Results
The attached spreadsheet shows the results of the capacity calculations for each
segement of the three proposed lines. This analysis indicates that all pipe sizes
exceed the capacity requirements for the flow in each segement. The minimum
excess capacity in all three systems is 0.187 MGD and occurs in Line C. All
segements are at or above minimum slopes as outlined in the design criteria.
Conclusion
The sanitary sewer mains for the proposed development exceed the minimum
requirements as described herein. pg,41
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