HomeMy WebLinkAboutUtility Availability Analysis 7607 Eastmark Drive, Ste. 252 -A <77840>
ME P.O. Box 9253, College Station, TX 77842
w .. Off /Fax (979) 764 % 0704
C cnsu /y,r n9 n9 j E ne.ers email: civil @rmengineer.com
July 28, 20-10
Josh Norton, P.E.
Assistant City Engineer
City of College Station
Planning & Development Services
1101 Texas Avenue South
College, Station, 77840
RE: West District: United Methodist Church
4201 State Highway 6 South, College Station, TX
Lot 1 & 2 — Barron Park Subdivision — Brazos County
Utility Availability Analysis
RME No. 255 -0404
Josh:
There is sufficient capacity in the existing water distribution system to support the above
referenced development and the associated proposed improvements. The existing and proposed
improvements and projected demands, for both water and sanitary sewer, are summarized below:
WATER SYSTEM IMPROVEMENTS:
• The subject property has accessibility to existing public water for both domestic and fire
use at the following locations:
o An existing 8" PVC public water line that traverses along the perimeter of the
subject property. This water line is located within a 15' Public Utility Easement
and is adjacent to a concrete fire lane;
o Flow tests where obtained from one existing hydrants. Existing fire hydrant T-
002, located at the western corner of the property, yields a flow of 1,350 gpm,
from the 2.5" nozzle, with a residual pressure of 91 psi and a static pressure of 95
psi (see attached CoCS Flow Test Reports);
o Fire flow will be accommodated from the existing hydrant T -002 and T -037. The
existing 8" PVC water line will be tapped which will accommodate water services
to the proposed building;
•3 Projected daily water demands are as follows (peaking factor of 4.0):
o The commercial building is anticipated to have an average water demand of 3
gpm and a peak demand of 12 gpm (as determined by B /CS Fixture Count &
Loading Factors). At average demand the proposed 1" domestic water service
line would experience an approximate velocity of 1.23 fps with a pressure loss of
approximately 1.95 psi. At peak demand the proposed 1" domestic water service
line would experience an approximate velocity of 4.91 fps with a pressure loss of
approximately 14.98 psi. Both pressure losses will allow the distribution system
to remain above the minimum TCEQ domestic pressure requirement of 35 psi.
CD1- 255- 0404- L04.docx Page 1 of 3
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7607 Eastmark Drive, Ste. 252 -A <77840>
P.O. Box 9253, College Station, TX 77842
" Off/Fax: (979) 764-0704
0704
Comsat/rig Encyirieers email: civil @rmengineer.com
Pressure losses reported are at worse -case scenario with the maximum line length
calculated;
o The fire flow demand, for the proposed development, was derived by the use of
the 2000 International Fire Code: Appendix B & C. The computed fire flow
requirement was determined to be 1,500 gpm with a building construction type of
IIIB and a gross square- footage less than 5,000 square -feet. Per the Fire Code this
flow will need to be accommodated from one (1) fire hydrant (1,500 gpm per
hydrant) that does not exceed a spacing of 450 feet. However, the B /CS UTSDS
requires that all commercial developments are provided with a fire flow of 3,000
gpm which can be split between to fire hydrants. As reported earlier the flow test
conducted by CoCS illustrate that the minimum require fire flows can be achieved
and is within the spacing limits necessary for fire coverage;
SEWER COLLECTION SYSTEM IMPROVEMENTS:
• The subject property has accessibility to public sanitary sewer at the following locations:
o An existing 8" PVC public sanitary sewer line, flows in a easterly direction along
the south property line of the project;
o A proposed 6" PVC Sanitary Sewer service line, laid at approximately a 0.80%
slope from each building, will be extended and connected to the existing 8" PVC
public sanitary sewer at an existing manhole;
• Projected daily sanitary sewer demands, for this development, are as follows (peaking
factor of 4.0):
o An average daily wastewater flow of 6,048 GPD and a 2 -hour Peak Flow of 0.04
cfs, per building, (as determined using the calculated water demand) is anticipated
for this development;
o The proposed 6" sanitary sewer service line has an approximate capacity of 1.1
cfs and an approximate velocity of 2 fps at peak flow conditions;
CD1 -255- 0404- L04.docx Page 2 of 3
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s , z 7607 Eastmark Dr ff / ive Fa, Ste x (97 76. 252 - <774 -070 840> 4
P.O. Box 9253, College Station TX 77842
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O yy
J" IE
' C.onsu/r /n9 Engineers email: civil @rmengineer.com
The proposed development and correlating water and sanitary sewer improvements are designed
and analyzed in accordance with the criteria outlined in the `B /CS Unified Technical
Specifications and Design Guidelines" (UTSDS) manual of the City of College Station (CoCS).
Please call if you have any questions or require additional information.
Sincerely,
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Rabon A. Metcalf, P.E.
Texas Firm Registration No. F -4695
rabon @tmengineer.com
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CDI -255- 0404- L04.docx Page 3 of 3