HomeMy WebLinkAboutWater System ReportWater System Report
for
Castle Rock Subdivision, Phases l A, lB, lC and 2A
College Station, Texas
September 2007
Prepared For:
DDH Investments, Inc.
4490 Castlegate Drive
College Station, Texas 77845
(979) 690-7250
Prepared By:
Civil Development, Ltd.
2033 Harvey Mitchell Parkway South
College Station, Texas 77840
(979) 764-7743
GENERAL INFORMATION
Location: The Castle Rock Subdivision is located on the south side of SH 40 in southern College
Station near AITington Road.
Area: Phases l A, lC, 2A = 23.0 ac. 69 lots
Phase 1 B = 3 .6 ac. 7 lots
Land Uses: Single Family Residential (Phases 1 A, 1 C, 2A)
Commercial A-P (Phase lB)
WATER SYSTEM ANALYSIS
Design Criteria
Domestic Demand:
Avg. Demand:
Peaking Factor:
Peak Demand:
Design Demand:
l 00 gpd per capita
2.67 persons per Jot
267 gpd per lot
0.185 gpm
4.0
0.74 gpm
1.5 gpm
Commercial Demand: 50 gpd per capita
30 persons/acre
Peaking Factor 4 .0
Fire Flow Demand: l 000 gpm at the single hydrant in Phase 2A (2AFH 1)
Pipe: PVC DR-14 C909
Roughness Coe.ff: 150
Hydraulic Software: Haestad Methods Water CAD v.6.0
Primary Water Supply: 24" line along SH 47
Existing City System Pressure Tests
Flow Hydrant #: V-064
Flowrate: 1430
Adj. Hydrant #: R-030
Static Pressure: l 02 psi (235 ft water)
Residual Pressure: 102 psi (assume 100 psi or 231 ft. water)
Analysis Summary
Criteria
Min. Pressure -static (psi)
Min. Pressure -fire (psi)
Max. Velocity (fps)
Max. Length of 6" pipe (ft)
(connected to 2. 8 "on both end5)
Max Length of 6" pipe (fl)
(not connected on both ends
Max. l ength of 3 "pipe (ft)
Required
35
20
12
1500
800
500
Provided
94.96
75.64
11 .84
NA
851 *
NA
*Note -Th e 6 ··line in Phase 2A 11·1"/I be connected to r111 8" line ll'ith
suhsequenl phases of the Castle Rock S11bdivisio11.
Applicable Exhibits: Exhibit A -City of College Station Fire Flow Test Report
Exhibit B -Water System Schematic Layout
Conclusion
Exhibit C -WaterCAD Model -Fire Flow Conditions
With the noted exception above regarding length of 6" water line, the water system for
Castle Rock Subdivision Phases I A, I B, IC and 2A meets or exceeds all of the design
criteria for the City of College Station. It will provide adequate water pressure and
tlowrate for both domestic and fire demands.
/
J "-' ~V, L.VV~ ..,.,.. • ""• 6 •••• -•"' • V"t .>"IJL.
'
N ~(College Station Utilities ~ Reliable, Affordable, Community Owned
1601 GRAHAM ROAD
COLLEGE STATION TEXAS 77845
Date: 19 DECEMBER 2005
Number pages including cover sheet - 1
Fax number: 764-7759
Attention: JOE SCHULTZ
Company: TEXCON
From: Butch Willis Water Wastewater Division
Phone: 979-764-3435 Fax: 979-764-3452
FLOW TEST REPORT
Nozzle size: 2.5 inch
Location: CASTLE GA TE AT HWY 40
Flow hydrant number: V-064
Pitot reading: 73
(GPM): 1430
Static hydrant number: R-030
Static PSI: 102
Residual PSI: 102
Exhibit A
OCSOtlPn(lN
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t•llJ/1,w!f:} /,1t1.:tmllP,,. .• 1-, 3o"!I
•::tJHU!JI? Sliill~~. f!I• I• fiR.10
P U Bo• 11929. C~e Sl.:lllO<l r.i~.1" 7 .'6-IL
(979) 164-7743 f,u t979J 764-7759
CASTLEROCK SUBDIVISION
PHASES 1A, 18, 1C & 2A
WATER SYSTEM
SCHEMATIC LAYOUT
'<!"
'° 0
(") I
(/) > D +' s::
d
I._
~ >,
I
+'
Vl
(})
D
}
B
' .
Label
lPI
lPlO
1P2
1P3
IP4
!PS
IP6
IP7
1P8
1P9
2API
2Pl0
OSI
OS2
OS3
OS4
oss
Exhibit C
Castle Rock Subdivision, Phases lA, lB, lC and 2A
Water System Analysis -FIRE FLOW
September 17, 2007
Water CAD JUNCTION SUMMARY
Computation of Lowest System Pressure
I I
Label Elevation Demand HGL I Pressure
ft I ---ft ---t---.· -PSI
lFHl 291 0.00 1 509.86 1 94.69
IFH2 290 7.so1 513 .00 96.48
1FH3 296 0.00 513 .87 94.26
1102 297 0.00 514.20 93.97 1
1103
1104
1105
1106
1107
1108
1109
1110
lJOl
2AFH1
2FH2
Length
ft
212
48
251
71
686
156
266
338
152
263
715
281
78
337
1388
470 I
967 I
I
302 0.00 514.18 91.80
303 0.00 514.13 91.35
293 9.00 1 514.04 95.64
296 4.50 514.11 94.37
293 39.00 1 513.33 95.33
292 42.00 1 512.25 95.29
291 o.oo l 509.62 94.58
297 0.00 512.06 93.05
290 0.00 514.32 97.05
286.5 1,043.50 461.33 75.64
286 0.001 505.35 94.90
Lowest Pressure= 75.64
Water CAD PIPE SUMMARY
Computation of Highest Velocity
Diameter Material Hazen-
Williams C
in
8 PVCI 150.00
8 PVC 150.00
8 PVCi 150.00
6 Pvcl 150.00
6 PVC 150.00
6 PVC 150.00
8 PVC 150.00
8 PVC 150.00
8 PVC 150.00
3 PVC 150.00
6 PVC 150.00
8 PVC 150.00
8 PVC 150.00
8 PVC 150.00 1
24 PVC 150.00 1
24 PVC I
24 PVC
150.001
150.00
Discharge
Q:Om
822.3
323.2
-822.3
221.2
22 1.2
-263.2
-270.7
-309.7
-309.7
9.0
1043.5
-1043.5
1145.5
1145.5
1145.5
822.3
822.3
I
I I
Velocity
ft/s
5.25
2.06
5.25
2.51
2.51
2.99
1.73
1.98
1.98
0.41
11 .84
6.66
7.31
7.31
0.81
0.58
0.58
Highest Velocity = 11.84
l'agc I ni' I
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