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HomeMy WebLinkAboutWater System ReportWater System Report for Castle Rock Subdivision, Phases lA, lB, 1 C, 2A and 2B College Station, Texas June 2008 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 ~ -(OCXXof ct/Ol't(O~ q:rs 'B-o-B GENERAL INFORMATION Location: The Castle Rock Subdivision is located on the south side of SH 40 in southern College Station near Arrington Road. Area: Phases 1 A, 1 C, 2A, 2B = 31.6 ac. 93 lots Phase lB = 3.6 ac. 7 Jots Land Uses: Single Family Residential (Phases lA, IC, 2A, 2B) Commercial A-P (Phase lB) WATER SYSTEM ANALYSIS Design Criteria Domestic Demand: Avg. Demand: Peaking Factor: Peak Demand: Design Demand: 1 00 gpd per capita 2.67 persons per lot 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: 1000 gpm at the single hydrant in Phase 2B (2BFH6) Pipe: PVC DR-1 4 C909 Roughness Coeff: 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: 102 psi (23 5 ft water) Residual Pressure: 102 psi (assume 100 psi or 231 ft. water) Analysis Summary Criteria Required Min. Pressure -static (psi) 35 Min. Pressure -fire (psi) 20 Max. Velocity (fps) 12 Max. Length of 6 " pipe (ft) 1500 (connected to~ 8 "on both ends) Max Length of 6 " pipe (ft) 800 (not connected on both ends Max. Length of 4 "pipe (ft) 500 Provided 95 .69 91.05 11.67 NA 851 * 435 *Note -The 6 " line in Phase 2A will be connected to an 8" line with subsequent phases of the Castle Rock Subdivision. Applicable Exhibits: Exhibit A-City of College Station Fire Flow Test Report Exhibit B -Water System Schematic Layout Conclusion Exhibit C -WaterCAD Junction Summary (static flow conditions) Exhibit D -WaterCAD Junction Summary (fire flow conditions) Exhibit E-WaterCAD Pipe Summary (fire flow conditions) With the noted exception above regarding length of 6" water line in Ph 2A, the water system for Castle Rock Subdivision Phases 1 A, lB, 1 C, 2A and 2B meets or exceeds all of the design criteria for the City of College Station. It will provide adequate water pressure and flowrate for both domestic and fire demands. 2 ( 1212012005 09 :37 FAX 979 764 3452 COLLEGE STATION PUB .UTL. . College Station Utilities (If Reliable, Affordable, Community Owned 1601 GRAHAM ROAD COLLEGE STATION TEXAS 77845 Date: 19 DECEMBER 2005 Number pages including cover sheet - I 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 GATE AT HWY 40 Flow hydrant number: V-064 Pitot reading: 73 (GPM): 1430 Static hydrant number: R-030 Static PSI: 102 Residual PSI: 102 @001 Exhibit A SCALE: NOT TO SCALE -tcelmlhvm.olVBNl'. IM.-tc CML !.HOJHl!:UIHQ: & DH~IEIMCU 2900 Longmire Oriv•, Suite K College Station, Texas 77845 P.O. Box 1Hl2Q, College St1tion, Texas 77&42 (979) 764-7743 Fn: (97Q) 764-7759 -a: <%: N CASTLE ROCK PHASE 28 WATER SYSTEM SCHEMATIC r::.----i;lJ~ ~--d51---;;;--~ ::l M 0 ::l M V) Cl .... "' 0 I > -+> c: d L ~ :c -+> "' .. ,__ EXHIBIT B Exhibit C Castle Rock Subdivision, Phases 2B Water System Analysis -STATIC FLOW June 24, 2007 Water CAD JlJNCTION SUMMARY Computation of Lowest System Pressure ~ Elevation Demand HGL I Pressure ft ft I psi l AFHl 291 0.00 524.08 100.84 1AFH2 290 7.50 524.04 101.26 1BFH2 297 4.00 524.18 98.29 lBJl 292.5 0.00 524.18 100.24 lCFHl 293 7.50 524 .07 99.97 1J02 297 0.00 524 .1 8 98.29 1J03 302 0.00 524.18 96.13 1J04 303 0.00 524.18 95.69 1J07 293 36.00 524.06 99.97 1108 292 42.00 524.04 100.39 1109 291 0.00 524.08 100.84 lJlO 297 0.00 524.14 98 .27 lJOl 290 0.00 524.18 101.32 2AFH2 286 0.00 524.05 102.99 2AFH3 286 57.00 523.81 102.89 2BFH1 283 0.00 524.04 104.29 2BFH6 288 6.00 524.03 102.12 2BJ01 288 6.00 524.04 102.12 2BJ03 287 22.50 523.39 102.27 2BJ05 283 0.00 524.04 104.29 2BJ06 283 4.50 524.04 104.2 9 2BJ07 284 0.00 524.05 103.86 Lowest Pressure (overall) = 95.69 Lowest Pressure (Ph 2B) = 102.12 Exhibit D Castle Rock Subdivision, Phases 2B Water System Analysis -FIRE FLOW June 24, 2007 Water CAD JUNCTION SUMMARY Computation of Lowest System Pressure I Label Elevation I Demand I HGL Pressure ft I I ft psi lAFHl 291 0.00 510.45 94.94 1AFH2 290 7.50 508.61 94.58 1BFH2 297 4.00 513.41 93.63 lBJl 292.5 0.00 513.41 95 .58 lCFHl 293 7.50 510.05 93.91 1102 297 0.00 513.49 93 .66 1J03 302 0.00 513.47 91.49 1J04 303 0.00 513.44 91.05 1J07 293 36.00 509.66 93.74 1J08 292 42 .00 508.84 93.81 1J09 291 0.00 510.6 1 95.02 lJlO 297 0.00 512.15 93.08 lJOl 290 0.00 513.60 96.74 2AFH2 286 0.00 509.68 96.77 2AFH3 286 57.00 509.43 96.67 2BFH1 283 0.00 507.54 97.15 2BFH6 288 1,006.00 500.27 91.84 2BJ01 288 6.00 506.86 94.69 2BJ03 287 22.50 499.62 91 .99 2BJ05 283 0.00 508.21 97.44 2BJ06 283 4.50 508.20 97.44 2BJ07 284 0.00 508.90 97.31 Lowest Pressure (overall)= 91.05 Lowest Pressure (Ph 2B) = 91.84 ' - Label I I lPl lPlO 1P2 1P3 1P4 1P5 1P6 1P7 1P8 1P9 2AP10 2AP11 2BP01 2BP02 2BP03 2BP04 2BP06 2BP07 2BP08 2BP09 OS3 OS4 OS5 Exhibit E Castle Rock Subdivision, Phases 2B "'ater Sys tem Analysis -FIRE FLOW June 24, 2007 Water CAD PIPE SUMMARY Computation of Highest Velocity Longfu 1~•~mote~+~t0>i•I I Hazen- Williams C Discharge rt I in gpm 212 8 PVC 150.00 638.8 49 10 PVC 150.00 554.2 25 1 8 PVC 150.00 -638.8 71 6 PVC 150.00 -178 .5 688 6 PVC 150.00 -178.5 157 6 PVC 150.00 136.5 264 8 PVC 150.00 -506.7 85 8 PVC 150.00 -542.7 726 8 PVC 150.00 -550.2 147 6 PVC 150.00 0.0 281 8 PVC 150.00 -460.3 856 6 PVC 150.00 57.0 289 8 PVC 150.00 -635. 7 110 6 PVC 150.00 -1028.5 438 ., PVC 150.00 22.5 .J 264 8 PVC 150.00 398.8 263 8 PVC 150.00 -398.8 49 ., PVC 150.00 4.5 .J 267 8 PVC 150.00 -403.3 296 8 PVC 150.00 -403.3 1199 24 PVC 150.00 1193.0 658 24 PVC 150.00 638.8 967 24 PVC 150.00 638 .8 I Velocity ft/s 4.08 2.26 4.08 2.03 2.03 1.55 3.23 3.46 3.51 0 2.94 0.65 4.06 11.67 1.02 2.55 2.55 0.2 2.57 2.57 0.85 0.45 0.45 Highest Velocity (overall)= 11.67