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HomeMy WebLinkAboutFire Report • Fire Flow Analysis Report • • for • • Polo Estates Subwdivision • • Brazos County, Texas • • March 2015 • • • Prepared By. • B • • Schultz Engineering, LLC • `. • TBPE Firm Registration No. 12327 • 2730 Longmire, Suite A • College Station, Texas 77845 • 979.764.3900 ' a tsagsyslrwyy.��s•r..a•.#�'rs'+ Y a �EP H t'. .'i.64.15*I:12 9��♦;ar�ar+a�a.r�sese+sasasss•.• • 64:410 • F-12327 • SCHULTZ ENGINEERING. ILC. • • • General Information Location: The Polo Estates Subdivision is a 34.069-acre residential 40 subdivision being developed immediately at the existing Foxworth • Subdivision, in Brazos County, Texas. The Final Plat shows a • total of 22 lots. • General Note: The water lines to serve these 22 residential lots will be an 8" & 6" • along Mallet Way, Mallet Court and Chukker Lane with an 8" line • that connects to the 6" line on South Dowling Road. The 6" line • along Mallet Way will loop and connect to the 6" line along North Graham Road. • • Primary Water Supply: • Water service is provided by an existing 6" line on North Graham • Road and a 6" line on South Dowling Road. This development is providing an 8" loop and a 6" line stubbed out to the adjacent tract. • Land Use: Single family Residential. 40 Design Criteria/Analysis • • Primary Water Supply: Existing 6"water lines along North Graham Road and South Dowling Road. • • Existing System Pressure Tests: • Flow Hydrant- See Exhibit B Flowrate: 1,320 gpm Static Pressure: 95 psi Residual Pressure: 58 psi Exhibits: Exhibit A—Water Layout Exhibit B—Hydrant Flow Test Results • Exhibit C—Pipe& Junction Analysis Summary—Domestic Flow • Exhibit D—Pipe& Junction Analysis Summary—Fire Flow • Domestic Use 1.5 gpm per lot for Single Family Residential • 22 Lots =33 gpm The proposed 6" & 8"waterlines are in accordance with the BCS Water Design Guidelines with the exception of 6"waterline W-1 which does not connect to an 8" line on each end. This report • provides the results of the water system analysis under the fire flow and domestic demand requirements, (1033 gpm) which produced the lowest pressure in the system. i Water System Summary Summary of Calculations w/Minimum Required Line Sizes "` Pressure Min. 80.1 psi • Domestic Demand �, Veloci Max. 0.24 fps • Pressure Min. 39.5 psi • Fire Flow Demand FH 1 Velocity Max. 6.99 fps Pressure Min. 1 41.3 psi • Fire Flow Demand FH 2 Velocity Max. 8.25 fps • Pressure Min. 41.3 psi Fire Flow Demand FH 3 • Velocity Max. 8.25 fps Pressure Min. 41.8 psi • Fire Flow Demand FH 4 ' 9.24 fps • Velocity Max. • 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 9.24 fps is less than the • required maximum of 12 fps. • Conclusion • The proposed water lines and fire hydrants provide the required • fire flow. The proposed 6" & 8" waterlines meets or exceeds all of • the design criteria for the City of College Station and the Wellborn Special Utility District with the exception of 6"waterline W-1 • which does not connect to an 8" line on each end. They will • provide adequate water pressure, flowrate and velocity for • domestic demands and fire flow. 0 • S • • • • • • • • S • • • • • • • • • • • • • • • • • • • • EXHIBIT A • • WATER LAYOUT • • • • • • • • • • • • • • • • • • • • • EXHIBIT B FLOW TEST REPORT • • • • _. • z Engineering, LLC • • • FIRM #12327 • WATER SYSTEM FIRE HYDRANT FLOW TEST REPORT • Date: 03-13-2015 Water System Owner: Wellborn SUD 4 Development Project: Polo Estates • 500' Southeast of CountryMeadows and South Dowlin • Flow Test Location: g • Nozzle Size (inch): 2.5 Discharge Coeff (c) = 0.90 • Pitot Reading (psi): 62 Flowrate Forula: Q=29.84cd2p1/2 • Flowrate (gpm): 1320 c = discharge coeff. C d = orifice size p = pitot pressure (psi) Pressure Gauge Location: Country Meadows and South Dowling Static Pressure (psi): 95 Residual Pressure (psi): 58 4 Compute Discharge at 20 psi Residential Pressure: QR = 1933 Discharge Formula: QR = QF X (hr0.54/hf0.54) wI C Note: The Flow Test and Report were prepared in accordance with NFPA 291 Report Prepared By: Joe Schultz Ricky Flores Others Present: Clendon Adams • • • • • • • • • • • • • • • • • • • EXHIBIT C • PIPE & JUNCTION ANALYSIS - DOMESTIC FLOW • • • • t • • • • • • • • • • • • iir • • • Exhibit C • WaterCAD Analysis Summary • Pipe Analysis- Domestic Demand Pipe Hazen- Flow Velocity • Number Length (ft) Size (in) Material Williams C (gpm) (ft/s) • P-1 1,036 6 PVC 150 -13 0.15 • P-2 987 6 PVC 150 -13 0.15 . P-3 495 6 PVC 150 20 0.23 P-4 1,291 6 PVC 150 20 0.23 • P-5 1,099 6 PVC 150 -1 0.01 • P-6 1,302 6 PVC 150 -13 0.15 • P-7 4,328 12 PVC 150 -13 0.04 • P-8 1,336 8 PVC 150 -13 0.08 „ P-9 380 6 PVC 150 10 0.11 P-10 451 6 PVC 150 3 0.03 P-11 231 8 PVC 150 -16 0.1 P-12 282 8 PVC 150 -19 0.12 P-13 7 6 PVC 150 -21 0.24 P-14 175 8 PVC 150 13 0.08 P-15 810 8 PVC 150 7 0.04 1 g' P-RES 16 12 PVC 150 33 0.09 • WaterCAD Analysis Summary Junction Analysis- Domestic Demand Junction Junction Elevation Demand Pressure 1 (gpm) (psi) J-1 274 0 91.3 J-2 254 0 100 J-3 266 0 94.8 _ J-4 272 0 92.2 J-5 289 0 84.8 1 J-6 294 2 82.6 J-7 300 0 80.1 J-8 292 0 83.5 FH-1 290 7 84.4 _ J-10 288 6 85.2 J-11 289 3 84.8 _ FH-4 289 2 84.8 FH-2 284 6 87 FH-3 275 7 90.9 • • • • • • • • • • • • • • • • • • • EXHIBIT D • • PIPE & JUNCTION ANALYSIS - FIRE FLOW • • • • • • • • • • • • • • • • • • • • • Exhibit D WaterCAD Analysis Summary Pipe Analysis- Fire Flow Demand (FH-1) Pipe Hazen- Flow Velocity Number Length (ft) Size (in) Material Williams C (gpm) (ft/s) P-1 1,036 6 PVC 150 -417 4.73 P-2 987 6 PVC 150 -417 4.73 P-3 495 6 PVC 150 616 6.99 P-4 1,291 6 PVC 150 616 6.99 P-5 1,099 6 PVC 150 126 1.43 P-6 1,302 6 PVC 150 -417 4.73 P-7 4,328 12 PVC 150 -417 1.18 P-8 1,336 8 PVC 150 -417 2.66 P-9 380 6 PVC 150 541 6.13 P-10 451 6 PVC 150 -466 5.29 P-11 231 8 PVC 150 -485 3.1 P-12 282 8 PVC 150 -488 3.12 P-13 7 6 PVC 150 -490 5.56 P-14 175 8 PVC 150 13 0.08 • P-15 810 8 _ PVC 150 7 0.04 • P-RES 16 12 PVC 150 1,033 2.93 • WaterCAD Analysis Summary • Junction Analysis- Fire Flow Demand (FH-1) • Junction Junction Elevation Demand Preps jre (gpm) si • J-1 274 0 58 • J-2 254 0 71.7 • J-3 266 0 71.4 • J-4 272 0 63.8 J-5 289 0 43.5 • J-6 294 2 40.7 • J-7 300 0 44.5 • J-8 292 0 48.7 • FH-1 290 1,007 39.5 J-10 288 6 43 • J-11 289 3 43 _ FH-4 289 2 43.4 • FH-2 284 6 44.8 • FH-3 275 7 48.7 • • 0 0 • • • di - 1. t. • • Exhibit D WaterCAD Analysis Summary Pipe Analysis- Fire Flow Demand (FH-2) Pipe Hazen- Flow Velocity Length (ft) Size (in) Material Number Williams C (gpm) (ft/s) P-1 1,036 6 PVC 150 -410 4.65 P-2 987 6 PVC 150 -410 4.65 P-3 495 6 PVC 150 623 7.07 P-4 1,291 6 PVC 150 623 7.07 P-5 1,099 6 PVC 150 -103 1.17 P-6 1,302 6 PVC 150 -410 4.65 P-7 4,328 12 PVC 150 -410 1.16 • P-8 1,336 8 PVC 150 -410 2.61 411 P-9 380 6 PVC 150 304 3.45 P-10 451 6 PVC 150 297 3.37 • P-11 231 8 PVC 150 -722 4.61 • P-12 282 8 PVC 150 -725 4.63 • P-13 7 6 PVC 150 -727 8.25 • P-14 175 8 PVC 150 1,013 6.47 P-15 810 8 PVC 150 7 0.04 • P-RES 16 12 PVC 150 1,033 2.93 • WaterCAD Analysis Summary • Junction Analysis- Fire Flow Demand (FH-2) Junction li Junction Elevation Demand Pressure (gpm) (psi) J-1 274 0 58.4 ,,,,. J-2 254 0 71.9 • J-3 266 0 71.4 J-4 272 0 63.7 J-5 289 0 43.1 J-6 294 2 41.3 J-7 300 0 44.9 J-8 292 0 49 FH-1 290 7 42 J-10 288 6 41.7 J-11 289 3 42 FH-4 289 2 43 FH-2 284 1,006 42.3 FH-3 275 7 46.2 Exhibit D WaterCAD Analysis Summary Pipe Analysis- Fire Flow Demand (FH-3) Pipe Hazen- Flow Velocity Number Length (ft) Size (in) Material Williams C (gpm) (ft/s) P-1 1,036 6 PVC 150 -410 4.65 P-2 987 6 PVC 150 -410 4.65 P-3 495 6 PVC 150 623 7.07 P-4 1,291 6 PVC 150 623 7.07 P-5 1,099 6 PVC 150 -103 1.17 P-6 1,302 6 PVC 150 -410 4.65 P-7 4,328 12 PVC 150 -410 1.16 P-8 1,336 8 PVC 150 -410 2.61 P-9 380 6 PVC 150 304 3.45 P-10 451 6 PVC 150 297 3.37 P-11 231 8 PVC 150 -722 4.61 P-12 282 8 PVC 150 -725 4.63 P-13 7 6 PVC 150 -727 8.25 • P-14 175 8 PVC 150 1,013 6.47 P-15 810 8 PVC 150 1,007 6.43 • P-RES 16 12 PVC 150 1,033 2.93 • WaterCAD Analysis Summary • Junction Analysis- Fire Flow Demand (FH-3) Junction ill Junction Elevation Demand Pressure 0 (gpm) (psi) • J-1 274 0 58.4 • J-2 254 0 71.9 • J-3 266 0 71.4 J-4 272 0 63.7 • J-5 289 0 43.1 • J-6 294 2 41.3 a' J-7 300 0 44.9 J-8 292 0 49 • FH-1 290 7 42 1-10 288 6 41.7 _ • J-11 289 3 42 • FH-4 289 2 43 • FH-2 284 6 42.3 " FH-3 275 1,007 41.3 4. 0 • • Exhibit D WaterCAD Analysis Summary Pipe Analysis- Fire Flow Demand (FH-4) Pipe Hazen- Flow Velocity Length (ft) Size (in) Material Number Williams C (gpm) (ft/s) P-1 1,036 6 PVC 150 -404 4.58 P-2 987 6 PVC 150 -404 4.58 P-3 495 6 PVC 150 629 7.14 P-4 1,291 6 PVC 150 629 7.14 P-5 1,099 6 PVC 150 -185 2.1 P-6 1,302 6 PVC 150 -404 4.58 P-7 4,328 12 PVC 150 -404 1.15 P-8 1,336 8 PVC 150 -404 2.58 P-9 380 6 PVC 150 217 2.46 P-10 451 6 PVC 150 210 2.38 P-11 231 8 PVC 150 191 1.22 P-12 282 8 PVC 150 188 1.2 P-13 7 6 PVC 150 -814 9.24 P-14 175 8 PVC 150 13 0.08 P-15 810 8 PVC 150 7 0.04 P-RES 16 12 PVC 150 1,033 2.93 WaterCAD Analysis Summary Junction Analysis- Fire Flow Demand (FH-4) Junction Junction Elevation Demand Pressure (gpm) (psi) • J-1 274 0 58.6 • 1-2 254 0 72 • J-3 266 0 71.4 J-4 272 0 63.6 • J-5 289 0 42.8 • J-6 294 2 41.8 • J-7 300 0 45.2 • J-8 292 0 49.3 • FH-1 290 7 43 J-10 288 6 43.2 • J-11 289 3 42.7 • FH-4 289 1,002 42.6 • FH-2 284 6 44.9 • FH-3 275 7 48.8 • • • • • • •