HomeMy WebLinkAboutWater Report I
Water System Report
for
Meadow Creek Subdivision, Phase 4B
College Station, Texas
November, 2011
Prepared By:
Schultz Engineering, LLC
TBPE Firm Registration No. 12327
2730 Longmire, Suite A
College Station, Texas 77845
979.764.3900
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JOSEPH P. SCHULTZ
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SCHULTZ ENGINEERING, LLC.
General Information
Location: Meadowcreek Subdivision, Phase 4B is located in southern Brazos
County, just off Koppe Bridge Road near Wellborn. It is immediately
adjacent to Phase 4A of the subdivision.
General Note: There are 38 lots in Phase 4B.
Land Use: Single Family Residential
Design Criteria /Analysis
Primary Water Supply: Existing 12" line along Koppe Bridge Road. It is connected to Phase 1
by an 8" line. The supply for Phase 4B will connect to 2 — 8" lines
constructed with Phase 4A.
Existing System Pressure Tests:
Flow Hydrant - See Exhibit B
Flowrate: 1,088 gpm
Static Pressure: 80 psi
Residual Pressure: 65 psi
Exhibits: Exhibit A — Location Map
Exhibit B — Hydrant Flow Test Results
Exhibit C — Pipe and Junction Analysis — Domestic Demand
Exhibit D — Pipe and Junction Analysis — Fire Flow Demand @ FH 1
Exhibit E — Pipe and Junction Analysis — Fire Flow Demand @ FH 2
Fire Flow: 1,000 gpm for Single Family Residential
Domestic Use 1.5 gpm per lot for Single Family Residential
The proposed 8" 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, (1,128
gpm) which produced the lowest pressure in the system. The lowest
residual pressure with the fire flow and domestic demand occurs with the
fire flow at Fire Hydrant 1 and is computed to be 56.2 psi. With the
domestic demand only, the residual pressure is computed to be 75.1 psi.
Each of these pressures exceed the 20 psi and 35 psi minimum pressure
requirements, respectively. The maximum velocity in all pipes is less
than 12 fps for all scenarios.
Conclusion
The proposed water system for Meadowcreek Subdivision, Phase 4B
meets or exceeds all of the design criteria for the City of College Station.
It will provide adequate water pressure and flow for both domestic and
fire demands.
Exhibit C
WaterCAD Analysis Summary
Pipe Analysis - Domestic Flow
Hazen -
Pipe Pipe William C- Pipe Flow Velocity
Number Length (ft) Size (in) Material Value (GPM) (ft /s)
P -1 220 8 PVC 150 43 0.27
P -2 459 8 PVC 150 17 0.11
P -3 259 8 PVC 150 2 0.02
P -4 250 8 PVC 150 -10 0.06
P -5 135 8 PVC 150 0 0
P -8 653 6 PVC 150 -43 0.48
P -9 308 6 PVC 150 61 0.69
P -10 181 8 PVC 150 0 0
P -RES 16 8 PVC 150 -126 0.8
P -6 29 8 PVC 150 -20 0.13
P -7 271 8 PVC 150 -20 0.13
Exhibit C
WaterCAD Analysis Summary
Junction Analysis - Domestic Flow Analysis
1 Elevation ' Demand Pressure
Junction (ft) (GPM) (PSI)
J -1 322 18 75.2
J -2 320 26 76.1
FH 1 312 15 79.5
J -4 309.5 12 80.6
J -5 307 11 81.7
J -6 306 0 82.1
J -7 308.5 23 81
Existing FH 317.5 23 77.2
J -9 308 0 81.2
FH 2 307.15 0 81.6
Exhibit D
WaterCAD Analysis Summary
Pipe Analysis - Fire Flow @ FH 1
Hazen -
Pipe Pipe William C- Pipe Flow Velocity
Number Length (ft) Size (in) Material Value (GPM) (ft /s)
P -1 220 8 PVC 150 621 3.96
P -2 459 8 PVC 150 595 3.8
P -3 259 8 PVC 150 -420 2.68
P -4 250 8 PVC 150 -432 2.76
P -5 135 8 PVC 150 0 0
P -8 653 6 PVC 150 -465 5.27
P -9 308 6 PVC 150 639 7.25
P -10 181 8 PVC 150 0 0
P -RES 16 8 PVC 150 -1126 7.19
P -6 29 8 PVC 150 -442 2.82
P -7 271 8 PVC 150 -442 2.82
Exhibit D
WaterCAD Analysis Summary
Junction Analysis - Fire Flow Analysis @ FH 1
Elevation I Demand ' Pressure
Junction (ft) (GPM) (PSI)
J -1 322 18 56.2
J -2 320 26 56.5
FH -1 312 1,015 58.9
1 -4 3 12 60.3
J -5 307 11 61.7
J -6 306 0 62.1
J -7 308.5 23 61.4
Existing FH 317.5 23 61.4
1 -9 308 0 60.9
FH -2 307.15 0 61.6
Exhibit E
WaterCAD Analysis Summary
Pipe Analysis - Fire Flow @ FH 2
Hazen -
Pipe Pipe William C- Pipe Flow Velocity
Number Length (ft) Size (in) Material Value (GPM) (ft /s)
P -1 220 8 PVC 150 569 3.63
P -2 459 8 PVC 150 544 3.47
P -3 259 8 PVC 150 _ 529 3.37
P -4 250 8 PVC 150 517 3.3
P -5 135 8 PVC 150 0 0
P -8 653 6 PVC 150 -516 5.86
P -9 308 6 _ PVC 150 587 6.66
P -10 181 8 PVC 150 0 0
P -RES 16 8 PVC 150 -1126 7.19
P -6 29 8 PVC 150 506 3.23
P -7 271 8 PVC 150 -494 3.15
Exhibit E
WaterCAD Analysis Summary
Junction Analysis - Fire Flow Analysis @ FH 2
Elevation Demand ; Pressure
Junction (ft) (GPM) 1 (PSI)
J -1 322 18 56.6
J -2 320 26 57
FH -1 312 15 59.6
J -4 309.5 12 60.2
J -5 307 11 60.8
J -6 306 0 61.3
J -7 308.5 23 60.6
Existing FH 317.5 23 61.4
J -9 308 0 60.8
FH -2 307.15 1000 60.7
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