HomeMy WebLinkAboutWastewater Design ReportDecember 22, 2011
Mr. Stephen Maldonado Jr.
City of College Station Water Services Department
1101 Texas Avenue
College Station, TX 77842
Re: Wastewater Design Report
Brazos Fellowship Addition
226 Southwest Parkway East
College Station, Texas
Gessner Engineering Job No.: 11-0361
Dear Mr. Maldonado:
The peak wastewater flow was calculated in accordance with the 2009
International Plumbing Code, Tables E103.3(2) and E103.3(3). The additional
fixture unit count of 191.25 was determined for this building. The values are
shown below in Table One.
Fixture
Number
Load
Factor
Total
Value
Water Closet
13
10
130
Urinal
3
10
30
Lavatory
10
2
20
Shower
1
4
4
Sink
1
4
4
Sink Service
1
3
3
FDrinkinq Fountain
1
0.25
0.25
Total
191.25
Table One: Fixture Units
Gessner
Engineering
The peak wastewater flow based on the fixture units is 90 gallons per 2501 Ashford Drive
minute for 200 fixture units. Using the Manning equation with an n
value of 0.013, the velocity in all sections of the proposed sewer line s""e'oz
were calculated as shown in Table Two below. CollegeStadon,7exas 77840
Pipe Section
Pipe Size
(in)
Pipe Slope
(°/a)
Pipe Capacity
(gpm)
Pipe Velocity
(tus)
Service Connection
6
2.3
382
4.33
CO. Box 10763, 77842-0763
979.680.8840
Table Two: Pipe Size, Slope and Velocity FAX 979.680.8841
2204 S. Chappell Hill St.
Brenhatn.7exas 77833
979.836.6855
FAX 979.836.6847
All pipe slopes are within the required range of minimum/maximum pipe slopes
for sanitary sewer from the Bryan/College Station Unified Design Guidelines.
Please contact us if you have any questions or if we can be of further assistance.
Sincerely,
GESSNER E4GINV ING, F-7451
.E., C.F.M.
G Gessner Engineering
November 16, 2011
Mr. Stephen Maldonado Jr.
City of College Station Water Services Department
1101 Texas Avenue
College Station, TX 77842
Re: Wastewater Design Report
Brazos Fellowship Addition
226 Southwest Parkway East
College Station, Texas
Gessner Engineering Job No.: 11-0361
Dear Mr. Maldonado:
The peak wastewater flow was calculated in accordance with the fixture count
determination method. The additional fixture unit count of 148 was determined
for this building. This calculation was determined based on the fixture unit load
factor given in Table I of the Sanitary Sewer Chapter of the Bryan/College Station
Unified Design Guidelines. The values are shown below in Table One.
Fixture
Number
Load
Factor
Total
Value
Water Closet
13
8
104
Urinal
3
4
12
Lavatory
10
2
20
Shower
1
3
3
Sink
1
4
4
Sink Service
1
3
3
Fountain
1
2
2
—Drinking
Total
148
Table One: Fixture Units
Gessner
Engineering
2501 Ashford Drivc
The peak wastewater flow based on the fixture units is 125 gallons per
minute for less than 500 fixture units. Using the Manning equation with s""`'oz
an n value of 0.013, the velocity in all sections of the proposed sewer College Station,'rexas 77840
line were calculated as shown in Table Two below.
CO. Box 10763, 77842-0763
Pipe Section
Pipe Size
(in)
Pipe Slope
(%)
Pipe Capacity
(gpm)
Pipe Velocity
(ft/s)
Senvice Connection
1 6
2.3
382
4.33
Table Two: Pipe Size, Slope and Velocity
979.680.9840
FAX 979.680.8841
2204 S. Chappell Hill St.
Brenhatn,Tcxas 77833
979.836.6855
FAX 979.836.6847
All pipe slopes are within the required range of minimum/maximum pipe slopes
for sanitary sewer from the Bryan/College Station Unified Design Guidelines.
Please contact us if you have any questions or if we can be of further assistance.
Sincerely,
GESSNEVef-NgMEERING, F-7451
P.E., C.F.M.
Kyle M. Zapalac, M.E., E.I.T.
r:
JEREMY N. 7
o.- 100217
0 Gessner Engineering