HomeMy WebLinkAboutLetter of AcknowledgementCorisai/rFrag �o.�pw•c
April 12, 2012
Erika Bridges, E.I.T.
Graduate Civil Engineer
City of College Station
1101 Texas Avenue South
College Station, TX 77842
RE: Creek Meadows — Section 3, Phase One
Acknowledgement of City Standards
RME No. 260-0438
Erika Bridges:
7607 Eastmark Drive, Ste. 252 <77840>
P.O. Box 9253, College Station, TX 77842
Off/Pax: (979) 764-0704
email: civil@rmengineer.com
The purpose of this letter is to acknowledge that the construction plans for the public
infrastructure improvements, for the above referenced project, to the best of my knowledge, do
not deviate from the latest B/CS Design Guideline Manual. With the exception of the following
items:
6• All segments of sanitary sewer line installed for this phase of construction, do not meet
the minimum flow velocity of 2.0 ft/s at peak flow conditions. The design of these lines
comply with minimum size, type and slope (per TCEQ requirements), however, the low
number of dwelling units discharging to these lines prevent peak flows from reaching a
flow velocity of 2.0 ft/s;
d• Proposed storm sewer located in areas that will be subjected to vehicular loadings
(including fire truck loading) are designed with Reinforced Concrete Pipe (Class 4). This
design standard will withstand the stated loadings even when the cover over the pipe is
less than two -feet (2');
❖ Proposed storm sewer does not increase in pipe size as the runoff travels downstream.
The exception to this drainage system is at the very upstream limit as it crosses under
Creek Meadow Boulevard North. When this portion of the street was construction,
Spring of 2007, it was uncertain what pipe size would be required therefore a 36" pipe
was installed. The Drainage Study for this section/phase revealed that only a 30" pipe
would be necessary. Therefore there is one segment of pipe that does not increase in size
as it proceeds downstream. Also at this connection there is not a 0.1' drop through the
junction box. Existing conditions prohibited this from being accomplished.
I also acknowledge, to the best of my knowledge that the details provided in the construction
plans are in accordance with the B/CS Standard Details.
C131-260-0438-1,04 Page 1 of 2
7607 Eastmark Drive, Ste. 252 <77840>
P.O. Box 9253, College Station, TX 77842
Off/Fax: (979) 764-0704
CnrtuilFrag ��p,.e.c
email: civil@rmengineer.com
Please do not hesitate to call if you have any questions.
Sincerely,
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Rabon A. Metcalf, P.E. No. 88583
Texas Firm Registration No. F-4695
rabon@rmengineer.com
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