HomeMy WebLinkAboutWATER SYSTEM REPORTWater System Report
for
Saddle Creek Subdivision
Phase 4
Brazos County, Texas
MAY 2012
Prepared By.
L ltz Engineering, LLC
TBPE Firm Registration No. 12327
2730 Longmire, Suite A
College Station, Texas 77845
979.764.3900
SCHULTZ ENGINEERING, LLG.
F -12327
General Information
Location: Saddle Creek Subdivision, Phase 4, is located on the south west side of
FM 2154, off of Stousland Rd.
General Note: The water lines to serve these 13 residential lots will be 8" and 6" lines.
There will be an 6" line along Lariat Lane and an 8" along Prairie Dawn
Trail and Remington Rd. The 8" lines will connect to stub outs on
Prairie Dawn Trail. The 6" line will connect to a stub out on Lariat
Lane.
Land Use: Single family residential
Design Criteria/Analysis
Primary Water Supply: Existing 8" water line along Prairie Dawn Trail and an existing 8" water
line at the intersection of High Meadow Trail and Lariat Lane.
Existing System Pressure Tests:
Flow Hydrant - See Exhibit B
Flowrate: 1300 gpm
Static Pressure: 83 psi
Residual Pressure: 70 psi
Exhibits: Exhibit A — Water System Layout
Exhibit B — Hydrant Flow Test Results
Exhibit C — WaterCAD Analysis Summary — Domestic Demand
Exhibit D — WaterCAD Analysis Summary — Fire Flow Demand @ FH1
Fire Flow: 1,000 gpm for Single Family Residential
Domestic Use 1.5 gpm per lot for Single Family Residential
Phase 4 — 14 Lots = 21 gpm
Future Development — 184 Lots = 276 gpm
Total Domestic Demand = 297 gpm
Conclusion
The proposed 8" & 6" water lines are in accordance with the BCS Water
Design Guidelines. This report provides the results of the water system
analysis under the fire flow and domestic demand requirements which
produced the lowest pressure in the system. The residual pressure with
the fire flow at FH No. 1 and domestic demand is computed to be 61.7
psi. The maximum velocity is 4.99 fps in pipe no. P -2. With the
domestic demand only, the residual pressure is computed to be 64.9 psi.
Each of these pressures exceeds the 20 psi and 35 psi minimum pressure
requirements, respectively. The maximum pipe velocities are less than 12
fps.
The proposed 8" & 6" water lines meet or exceed all of the design
criteria for the City of College Station and the Wellborn Special Utility
District. It will provide adequate water pressure, flowrate and velocity
for both domestic and fire flow demands.
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Exhibit B
Water System Flow Test Report
Date: August 7, 2008
Water System Owner:
Wellborn SUD
Development Project: Saddle Creek Subdivision, Ph 2
Flow Test Location: FH at corner of Prairie Dawn Tr and Wild Rose Ct
Nozzle size (in.): 2.5
Pitot Reading (psi): 63
Flowrate (gpm):
Pressure Guage Location:
1332 computed
Discharge Coef: (c): 0.9
Flowrate formula: Q= 29.84ed'p"
c = discharge Coef.
d = orifice size (in)
p = pitot pressure (psi)
FH at corner of Saddle Creek Dr and Prairie Dawn Tr
Static (psi): 83
Residual (psi):
70
This now est was conducted in accordance with NFPA 291. The system meets or exceeds
minim design dards and flow requirements of tl d the State of Texas.
Report prepared by:
stpalrne
Kent Laze
printed name
Others present: Steven Cast, Wellborn SUD
Meredith Carriker, CDL
Mike Marcus, Texcon
Exhibit C
WaterCAD Analysis Summary
Junction Analysis - Domestic Demand
Junction
Elevation
(ft)
Demand
(GPM)
Pressure
(PSI)
J -1
275.2
14
69.9
J -2
276.3
0
69.6
1 -3
277.14
7
69.3
J -4
278.58
7
68.6
J -5
283.02
3
66.6
J -6
287
0
64.9
J -7
282.93
35
66.5
J -8
273.22
18
70.7
J -9
272.78
6
70.9
J -10
281.88
3
67
J -11
278.68
0
68.6
J -12
276
7
69.8
J -13
277.17
0
69.3
1 -14
272
188
71.2
J -15
271
9
71.7
J -16
272
0
71.2
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Exhibit D
WaterCAD Analysis Summary
Junction Analysis - Fire Flow Demand @ FH 1
Junction
Elevation
(ft)
Demand
(GPM)
Pressure
(PSI)
J -1
275.2
14
68.4
J -2
276.3
0
69.6
J -3
277.14
7
69.2
J -4
278.58
1,007
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J -5
283.02
3
63.4
J -6
287
0
61.7
J -7
282.93
35
64.1
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273.22
18
68.9
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272.78
6
69.3
J -10
281.88
3
64.6
J -11
278.68
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68.5
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272
188
69.5
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