HomeMy WebLinkAboutWater ReportWater System Report
for
Castlegate II Subdivision, Section 203
College Station, Texas
August 2013
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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SCHULTZ ENdNEMK LLG.
General Information
Location: The Castlegate II Subdivision, Section 203 is a 10.451-acre residential
subdivision being developed immediately southwest of the existing
Castlegate II Subdivision, Section 201 in College Station. The Final Plat
shows a total of 32 lots in this section.
General Note: An analysis was conducted on the entire Castlegate II water system to
ensure its ability to serve all lots under fully developed conditions. This
analysis was conducted with water line sizes of 8" or less to demonstrate
that larger size lines are not necessary even though they may be required
by the City for future development in the area. Refer to the report by
Phillips Engineering titled " Water System Report For Castlegate II,
Section 200 College Station, Texas", revised April 2011.
Primary Water Supply: Castlegate water service is provided by an existing 8" line on Victoria
Avenue and an 8" line that lies in an easement in Section 7 of Castlegate.
Section 200 was connected to each of these lines, and both lines will be
used to provide looping in all future phases of the development. Section
203 connects to an existing 8" waterline that was constructed with
Castlegate II Section 201
Land Use: Single family residential
Design Criteria/Analysis
Primary Water Supply: Existing 8" water line along Odell Lane.
Existing System Pressure Tests:
Flow Hydrant - See Exhibit B
Flowrate: 1,250 gpm
Static Pressure: 88 psi
Residual Pressure: 80 psi
Exhibits: Exhibit A — Water Layout
Exhibit B — College Station Utilities Flow Test Report
Exhibit C — WaterCAD Analysis Summary
Fire Flow: 1,000 gpm for Single Family Residential
Domestic Use 1.5 gpm per lot for Single Family Residential
Section 203 — 32 Lots = 48 gpm
Existing Development (Section 201) —19 lots = 31.5 gpm
Future Development (Section 205) — 32 Lots = 48 gpm
Total Domestic Demand = 127.5 gpm
The proposed 8" 6" & 4" 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,
(1127.5 gpm) which produced the lowest pressure in the system.
Water System Summary of Section 102
Domestic Demand Pressure Min.
79.1 psi
Velocity Max.
0.81 fps
Pressure Min.
65.5 psi
Fire Flow Demand FH 1 Velocity Max.
11.62 fps
Pressure Min.
Fire Flow Demand FH 2
67.9 psi
Velocity Max.
11.62 fps
As shown above the system exceeds the minimum required
pressures of 35 psi for domestic flow and 20 psi for fire flow in
both analyses. The maximum velocity of 11.62 fps is less than the
required maximum of 12 fps.
Conclusion
The proposed 8" 6" and 4" water lines meet or exceed all of the design
criteria for the City of College Station. They will provide adequate water
pressure, flowrate and velocity for both domestic and fire flow demands.
EXHIBIT Al
WATER LAYOUT
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CASTLEGATE II SCALE EXHIBIT
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SECTION 203 WATER LAYOUT N°^l�•� ''_'�
COLLEGE STATION, TEXAS PmTII. c 1E: 1:1
FEE NAME 13-291
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COLLEGE STATION UTILITIES FLOW TEST REPORT
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Date test completed Wednesday August 29, 2012
Time completed 10:30 A.M.
Test completed by Floyd Anderson
Comments For Initial
EXHIBIT C
PIPE & JUNCTION ANALYSIS
Exhibit C
WaterCAD Analysis Summary
Pipe Analysis - Domestic Demand
Number Pipe
p
Length ft
g ( )
Size in
( )
Material
Hazen-
Williams C
Flow (gpm)
Velocity (ft/s)
P-1
320
6
PVC
150
-23
0.26
P-2
170
8
PVC
150
96
0.61
P-3
73
8
PVC
150
96
0.61
P-4
30
8
PVC
150
24
0.15
P-S
66
8
PVC
150
-24
0.15
P-6
267
8
PVC
150
48
0.31
P-7
307
8
PVC
150
24
0.15
P-8
153
8
PVC
150
0
0
P-9
18
6
PVC
150
24
0.27
P-10
491
4
PVC
150
15
0.38
P-11
18
6
PVC
150
24
0.27
P-12
490
4
PVC
ISO
15
0.38
P-RES
25
8
PVC
150
128
0.81
WaterCAD Analysis Summary
Junction Analysis - Domestic Demand
Junction
Elevation
Junction
Demand
(gpm)
Pressure (psi)
J-1
318.01
23
86.9
J-2
316.25
9
87.7
J-3
319.1
0
86.5
J-4
320.13
0
86
J-5
321.2
24
85.6
J-6
320.04
24
86.1
1-7
323.29
0
84.6
1-8
323.64
0
84.5
J-9
323.67
0
84.5
FH-1
324.08
9
84.3
J-11
338.42
15
78.1
FH-2
325.81
9
83.6
J-13
337
15
78.7
Exhibit C
WaterCAD Analysis Summary
Pipe Analysis - Fire Flow Demand (FH-1)
Pipe
Number
Length (ft)
Size (in)
Material
Hazen-
Williams C
Flow (gpm)
Velocity (ft/s)
P-1
320
6
PVC
150
-23
0.26
P-2
170
8
PVC
150
1,096
7
P-3
73
8
PVC
150
1,096
7
P-4
30
8
PVC
150
24
0.15
P-5
66
8
PVC
150
-24
0.15
P-6
267
8
PVC
150
1,048
6.69
P-7
307
8
PVC
150
1,024
6.54
P-8
153
8
PVC
150
0
0
P-9
18
6
PVC
150
1,024
11.62
P-10
491
4
PVC
150
15
0.38
P-11
18
6
PVC
150
24
0.27
P-12
490
4
PVC
150
15
0.38
P-RES
25
8
PVC
150
1,128
7.2
WaterCAD Analysis Summary
Junction Analysis - Fire Flow Demand (FH-1)
Junction
Elevation
junction
Demand
(gpm)
°°°•"
Pressure
(psi)
J-1
318.01
.....23
80.3
J-2
316.25
9
81.1
1-3
319.1
0
78.6
1-4
320.13
0
77.6
1-5
321.2
24
77.2
J-6
320.04
24
77.7
J-7
323.29
0
74.5
J-8
323.64
0
72.4
1-9
323.67
0
72.4
FH-1
324.08
11009
71.8
1-11
338.42
15
65.5
FH-2
325.81
9
73.4
1-13
337
15
68.5
Exhibit C
WaterCAD Analysis Summary
Pipe Analysis - Fire Flow Demand (FH-2)
Pipe
Number
Length (ft)
Size (in)
Material
Hazen-
Williams C
Flow (gpm)
Velocity (ft/s)
P-1
320
6
PVC
150
-23
0.26
P-2
170
8
PVC
150
1,096
7
P-3
73
8
PVC
150
1,096
7
P-4
30
8
PVC
150
24
0.15
P-5
66
8
PVC
150
-24
0.15
P-6
267
8
PVC
150
1,048
6.69
P-7
307
8
PVC
150
24
0.15
P-8
153
8
PVC
150
0
0
P-9
18
6
PVC
150
24
0.27
P-10
491
4
PVC
150
15
0.38
P-11
18
6
PVC
150
1,024
11.62
P-12
490
4
PVC
150
15
0.38
P-RES
25
8
PVC
150
1,128
7.2
WaterCAD Analysis Summary
Junction Analysis - Fire Flow Demand (FH-2)
Junction
Elevation
Junction
Demand
(gpm)
Pressure
(psi)
J-1
318.01
23
80.3
J-2
316.25
9
81.1
J-3
319.1
0
78.6
1-4
320.13
0
77.6
1-5
321.2
24
77.2
J-6
320.04
24
77.7
1-7
323.29
0
74.5
1-8
323.64
0
74.3
1-9
323.67
0
74.3
FH-1
324.08
9
74.2
J-11
338.42
15
67.9
FH-2
325.81
1,009
72.9
J-13
337
15
68.1