HomeMy WebLinkAboutLetter Acknowledging City StandardsJanuary 5, 2008
Ms. Erika Bridges
Engineering Department
City of College Station
1101 Texas Avenue
College Station , Texas 77842
Re : Letter Acknowledging City Standards
Public Restroom
Northgate Area
College Station, Texas
Gessner Engineering Job No.: 08-0256
Dear Ms. Bridges:
The purpose of this letter is to acknowledge that the construction plans for the
water, sanitary sewer, streets and drainage for the above-referenced project, to
the best of my knowledge, do not deviate from the B/CS Design Guideline
Manual. Any alternate design or construction methodology that was used is
listed below:
1. 'Perimeter Guard' Sediment Control Fence was utilized in lieu of standard
silt fence because it was needed over paved areas since this is an
addition. This fencing allows cars to drive over it as needed , yet provides
sediment control during construction. G
2. Polycast Trench Drain System and HOPE Pipe used
in the Storm Sewer Design. This is discussed in
depth in the Drainage Report. The HOPE pipe is
located entirely on private property and is not under
vehicular traffic loading. In addition, the size,
minimum slope, and velocity of this proposed pipe
does not meet city Public Design Standards. Since
this is a private line, it does not need to meet these
public design standards. In addition , due to the tie
in elevation of the storm sewer, minimum slopes
had to be utilized. There is not enough proposed
flow entering this storm sewer line to achieve
required velocities, unless it was to be a 4 inch line,
which of course is not appropriate for maintenance.
The slope and size of the pipe, as well as velocity of
proposed flow shall be adequate to handle this
development as it has been designed, even though
it does not meet the public design standards.
Gessner
Engineering
1712 Southwest Pkwy
Suite I 05
College Station, Texas 77840
P.O. Box I 0763, 77842-0763
979.680.8840
FAX 979.680.8841
2204 S. Chappell Hill St.
Brenham, Texas 77833
979.836.6855
FAX 979.836.6847
I also acknowledge , to the best of my knowledge, that the details provided in the
construction plans are in accordance with the Bryan/College Station Standard
Details.
Sincerely,
GESSNER ENGINEERING
Melissa P. Thomas, P.E.
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