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HomeMy WebLinkAboutWater Distribution System Analysis , r Water Distribution System Analysis SPRING CREEK TERRACE PHASE ONE COLLEGE STATION, BRAZOS COUNTY, TEXAS APRIL, 2011 r �,E��.°• F. � T �� • • . f MICHAEL G. ''? e 69104 ..� 1 ( 4. / .C S�pNF1L . �' THE SEAL APPEARING ON THIS DOCUMENT WAS AUTHORIZED BY MICHAEL G. HESTER, P.E. #69104 APRIL 13, 2011 RELEASED FOR RECORD Submitted By: Michael G. Hester, P.E. HESTER ENGINEERING COMPANY #F -3476 7607 Eastmark Drive, Suite 253 -B College Station, TX 77840 (979) 693 -1100 ,,, -70 I U 03„AL WATER DISTRIBUTION SYSTEM ANALYSIS SPRING CREEK TERRACE PHASE ONE COLLEGE STATION, BRAZOS COUNTY, TX APRIL, 2011 INTRODUCTION: The proposed development is located adjacent to the the intersection of Decatur Drive and Dayton Court and will connect to Whispering Creek Drive. The development is bordered on the north by an undeveloped light industrial zoned tract, the west by the Shenandoah development, the east by an undeveloped commercial zoned tract and the south by Spring Creek Gardens. The legal description is Spring Creek Terrace (SCT) and is approximately 10.4 acres. The proposed improvements include pavement, drainage and utility improvements for 44 single - family residential homes. The site consists of numerous small trees and the terrain slopes in a easterly direction toward a tributary of Spring Creek at an average slope of 2- percent. The site is zoned R -1 (residential) and is being developed by JC Wall, PIL Investments, P.O. Box 390, Moody, Texas 76557, 254 - 721 -6179. The proposed system will connect to an existing 12 -inch waterline along Decatur Drive and a n 8 -inch waterline along Wispering Creek Drive. Static pressure information was obtained form the College Station Utility Department and was based on an onsite pressure test of the fire hydrant located along Decatur Drive, the static pressure of the fire hydrant is 105 pounds per square inch. The proposed water distribution system was modeled using the Haestead Methods "Watercad" program and scenarios were prepared placing fire flow demands at each proposed fire hydrants. The maximum daily demand generated by the dwelling units was added to the fire flow demand. The results of the analysis has been included in this report. ANALYSIS REQUIREMENTS / CONSTRAINTS -PVC water line pipe with a roughness coefficient of 150 -Fire flows of 1000 gpm -8' minimum waterline size - Minimum residual pressures at 20 p.s.i. - Minimum static pressure at 35 p.s.i. DAILY FLOW CALCULATIONS RESIDENTIAL (1 D.U.) *(2.67 PEOPLE /D.U.) *(100 CPCD) *(1 DAY /1440 MIN.)= 0.19 GPM Peak Hourly Flow X 4 = Average Daily Flow Maximum daily flow for a section of waterline = 0.74 gpm times the number of lots. CONCLUSION: In conclusion the proposed system can provide a fire flow demand of 1000 gpm at each fire hydrant with a residual pressure greater than 20 psi. SPRING CREEK TERRACE PHASE ONE - PAGE 1 OF 1 PAGES Scenario: Base FH3 W- $ISPERING GREEK DRIVE Ba1 J-6 ‘ft ALTIC DR FH-2 P P-2 . 1 SPRING MEEK TERRACE J-1 DECATUR DRIVE EXIS11 NG 12-I NCH UNE R-1 Title: SPRING CREEK TERRACE Project Engineer: Michael G. Hester, P.E. c: \... docfiles\water report\watercad\sct.wcd Hester Engineering Company WaterCAD v6.5 [6.5120i] 04/12/11 06:38:41 PM ® Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA +1- 203 - 755 -1666 Page 1 of 1 Scenario: Base Fire Flow Analysis Fire Flow Report Label Fire Flow Satisfies Needed Available Total Total Calculated Calculated Base Flow Balanced? Fire Flow Fire Flow Fire Flow Flow Residual Minimum (gpm) Constraints? (gpm) Flow Needed Available Pressure System (9Pm) (9Prn) (gpm) (Psi) Pressure (psi) J -1 true true 1,000.00 1,250.001 1,250.00 92.30 92.17 0.00 FH -1 true true 1,000.00 1,250.00 1,000.00 1,250.00 90.37 92.09 0.00 FH -2 true true 1,000.00 1,250.00 1,018.50 1,268.50 85.29 83.99 18.50 80-1 true true 1,000.00 1,250.00 1,000.00 1,250.00 81.63 85.29 0.00 FH-3 true true 1,000.00 1,250.00 1,000.00 1,250.00 84.52 83.99 0.00 J-6 true true 1,000.00 1,250.00 1,013.32 1,263.32 83.10 83.99 13.32 Title: SPRING CREEK TERRACE Project Engineer: Michael G. Hester, P.E. c:\...\docfiles \water report\watercad\sct.wcd Hester Engineering Company WaterCAD v6.5 (6.512011 04/12/11 06:37:53 PM C Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA +1- 203 - 755 -1666 Page 1 of 1 • Scenario: Base Fire Flow Analysis Pipe Report Label Length Diameter Material Hazen- Minor Discharge Pressure Headloss Velocity (ft) (in) Williams Loss (gpm) Pipe Gradient (ft/s) C Coefficient Headloss (ft/1000ft) (ft) P -1 1,315.00 12.0 PVC 150.0 2.22 31.82 0.00 0.00 0.09 P -2 14.61 8.0 PVC 150.0 3.71 31.82 0.00 0.19 0.20 P-3 714.00 8.0 PVC 150.0 2.78 31.82 0.02 0.03 0.20 P-4 179.54 8.0 PVC 150.0 1.67 0.00 0.00 0.00 0.00 P-5 450.00 8.0 PVC 150.0 2.04 13.32 0.00 0.01 0.09 P-6 138.00 8.0 PVC 150.0 0.30 13.32 0.00 0.00 0.09 Title: SPRING CREEK TERRACE Project Engineer: Michael G. Hester, P.E. c:1...klocfiles \water report \watercad\sct.wcd Hester Engineering Company WaterCAD v6.5 [6.5120i] 04/12/11 06:39:41 PM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA +1- 203 - 755 -1666 Page 1 of 1 Scenario: Base Fire Flow Analysis Junction Report Label Elevation Type Base Flow Demand Calculated Pressure Satisfies Calculated Calculated (ft) (gpm) (Calculated) Hydraulic Grade (psi) Fire Flow Minimum Residual (gpm) (ft) Constraints? System Pressure Pressure CO (psi) Total Flow Needed (psi) J -1 296.70 Demand 0.00 0.00 514.55 94.25 true 92.17 92.95 FH -1 297.00 Demand 0.00 0.00 514.54 94.12 true 92.09 91.65 FH -2 290.00 Demand 18.50 18.50 514.52 97.14 true 83.99 89.28 BO-1 293.00 Demand 0.00 0.00 514.52 95.84 true 85.29 86.44 FH-3 280.00 Demand 0.00 0.00 514.52 101.47 true 83.99 90.24 J-6 280.00 Demand 13.32 13.32 514.52 101.47 true 83.99 89.30 Title: SPRING CREEK TERRACE Project Engineer: Michael G. Hester, P.E. c:\...\docfiles \water report \watercad\sct.wcd Hester Engineering Company WaterCAD v6.5 (6.5120i) 04/12/11 06:39:09 PM C Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA +1 -203- 755 -1666 Page 1 of 1 Cr College Station Utilities Reliable, Affordable, Community Owned Date Tuesday August 10.2010 Time 11:00 A.M. Test completed by Justin Tamplin Witness Vincent Rodriguez Location Decatur Nozzle size 2.5 Flow hydrant R-058 Pitot reading 90 G.P.M. 1190 Static hydrant R-059 Static PSI 105 Residual PSI 103 Comments