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Home My WebLink AboutWater Distribution System AnalysisWater Distribution System Analysis We Rent Storage 2672 Horse Haven Lane College Station, Brazos County, Texas May, 2012 MICHAEL G. HESTER ro 69104 ��t��F�/c�NS�o THE SEAL APPEARING ON THIS DOCUMENT WAS AUTHORIZED BY: MICHAEL G. HESTER, P.E. #69104 ON May 3, 2012. RELEASED FOR RECORD HESTER ENGINEERING COMPANY #F-3476. Prepared By: Michael G. Hester, P.E. Hester Engineering Company 7607 Eastmark Drive, Suite 253-B College Station, TX 77840 (979) 693-1100 mhester@hester-engr.com WATER DISTRIBUTION SYSTEM ANALYSIS WE RENT STORAGE 2672 HORSE HAVEN LANE College Station, Brazos County, Texas May 2012 INTRODUCTION: The site is located at the intersection of Horse Haven Lane and Appomattox Drive in the Horse Haven Subdivision. The legal description is We Rent Storage, Block 1, Lot 1 is 2.60 acres and zoned PDD. The entire site is in the City limits and a personal storage facility is planned for the site. The Cities staff engineer is Erika Bridges. The proposed fire hydrants will connect to an existing 8" waterline along Horse Haven Lane. Static pressure information was obtained from the Cities Water Division @ 764-3660 and was based on recent flow testing of an adjacent fire hydrant and the static pressure was 112 psi. The proposed waterline was modeled using the Haestead Methods "Watercad" program using the "Hazen -Williams" pressure friction equation. One of the primary goals of a water distribution system is to provide adequate capacity to fight fires. WaterCAD's automated fire flow analysis was used to determine if the system can meet the fire flow demands while maintaining minimum pressure constraints. In the program fire flows are computed by iteratively assigning demands and computing system pressures. The model assigns the fire flow demand to a node and checks the model, checking to see if all pressure constraints are met at that demand. Scenarios were prepared placing fire flow demands at each proposed fire hydrant and the peak hourly demand generated by the proposed small office was added to the fire flow demand. The results of the analysis have been included in this report. INTERNATIONAL FIRE CODE (IFC): International Buidling Code (IBC) type I non-combustabile light gage steel construction, largest building is 6217 square feet, non -sprinkled. IFC minimum fire flow is 1500 gal/min for 2 hours. ANALYSIS REQUIREMENTS/CONSTRAINTS -PVC water line pipe with a roughness coefficient of 150 -Fire flows of 1500 gpm (750 gpm between two adjacent fire hydrants) -Minimum residual pressures at 20 p.s.i. -Minimum static pressure of 35 p.s.i. -Maximum velocity of 12 fps. CONCLUSION: In conclusion the proposed system can provide a fireflow demand of 1500 gpm as required and maintain a residual pressure greater than 20 psi. WE RENT STORAGE - WATER DISTRIBUTION SYSTEM ANALYSIS PAGE 9 OF 2 PAGES T I 1 I 1 I I I i I T �( MICHAEL G. HESTER THE SEAL APPEARING ON THIS DOCUMENT WAS AUTHORIZED BY: MICHAEL G. HESTER, P.E. #69104 ON May 3, 2012 RELEASED FOR RECORD HESTER ENGINEERING COMPANY #F-3476. General Calculations: -Velocity of 6-inch line: Q-AV and V=Q/A A=nR• y2= (750 gal/min)(0.1337 cf/oal)(1 min/60 sec) 1.67 cf/sec= 8.52 ft/sec = velocity of 6-Inch line @ 750 gpm. A 3.14 (0.25)2 0.196 ft2 -Peak Hourly How = (Average Daily Flow)(4): 1 person 0 (50 gal/cap/day)(1day/1440min) _ (0.035 gal/min)(4)= 0.14 gpm Attachments: WaterCad Fire Flow Analysis Hydrant Flow Test Report WE RENT STORAGE - WATER DISTRIBUTION SYSTEM ANALYSIS PAGE 2 OF 2 PAGES Scenario: Base EXISTII NEW 6" LINE 750 GPM FIRE FLOW VEL = 8.52 FPS MAX 0.14 GPM BASE DEMAND CDCS KW9 Ri-2 NEW 6" LINE 750 GPM FIRE FLOW VEL = 8.52 FPS MAX TRIO: WE RENT STORAGE Project Engineer: MICHAEL G. HESTER, P.E Scenario: Base Fire Flow Analysis Fire Flow Report Label Fire Flow Satisfies Needed Available Total Total Calculate*alculatec Base Flow Balanced? Fire Flow ire Flom Fire Flow Flow Residual Minimum (gpm) onstraints (gpm) Flow Needed vailable Pressure System (gpm) (gpm) (gpm) (psi) Pressure (psi) FH-1 true true 750,001,500.00 750,141,500.14 97.75 106.30 0.14 FH-2 true true 750,001,500.00 750.00 1 500.00 100.53 109.18 0.00 J-3 true true 750,001,500.00 750.001:500.00 106.30 107.07 0.00 J-4 true I true 750,001,500.00 750,001,500.00 109.18 109.341 0.00 Title: WE RENT STORAGE Project Engineer: MICHAEL G. HESTER, P,E Scenario: Base Fire Flow Analysis Pipe Report Label Length Diameter Material Hazen- Minor Discharge (ft) (in) Williame Loss (gpm) C oefficlen P-2 166.31 8.0 PVC 150.0 1.48 0.14 P-3 56.69 6.0 PVC 150.0 3.27 0.14 P-4 61.04 6.0 PVC 150.0 3.27 0.00 P-1 45.00 8.0 PVC 150.0 3.27 0.14 Title: WE RENT STORAGE Project Engineer: MICHAEL G. HESTER, P.E College Station Utilities Reliable, Affordable, Community Owned Date test completed Friday November 11, 2011 Time completed Test completed by Witness FLOW HYDRANT Location Nozzle size Hydrant number Pitot reading in PSI Flow in G.P.M. Location Hydrant number Static PSI Residual PSI Comments 2:30 P.M. Justin Tamplin Vincent Rodriguez 2700 Horse Haven 2.5 H-039 85 2706 Horse Haven H-059 112 Reguested Flow We Rent Storage Waterline Engineers Preliminary Quantity and Cost Estimate 5/3/2012 ITEM I DESCRIPTION UNIT QUANTITY UNIT COST EXTENSION 1 PREPARATION: REMOVE AND REPLACE FENCE, RETURN AFFECTED AREA TO PRE -CONSTRUCTION CONDITION OR BETTER L.S. 1 $1,000.00 $1,000.00 2 CUT IN 8"X6" TEES - COMPLETE IN PLACE EA 2 $5,000.00 $10,000.00 3 W C900 WATERLINE CL200 DR14 L.F. 118 $25.00 $2,950.00 4 6"X11.25 DEG BEND EA. 1 $250.00 $250.00 5 6"X22.5 DEG BEND EA. 1 $250.00 $250.00 6 STANDARD FIRE HYDRANTS EA. 2 $2,750.00 $5,500.00 7 6" GATE VALVE EA. 2 $400.00 $800.00 8 8" GATE VALVE EA. 2 $500.00 1 $1,000.00 TOTAL ESTIMATED CONSTRUCTION COST = $21,750.00 THE SEAL APPEARNG ON THIS DOCUMENT WAS AUTHORIZED BY MICHAEL G. HESTER, P.E. ON May 3, 2012 RELEASED FOR RECORD MICHAEL G. HESTER 69 104 �� HESTER ENGINEERING COMPANY #f-3476 METES AND BOUNDS DESCRIPTION OF A 0.022 ACRE TRACT ONE PUBLIC UTILITY EASEMENT FOR RELEASE LOT 1, BLOCK ONE HORSE HAVEN ESTATES, PHASE. FIVE COLLEGE STATION, BRAZOS COUNTY, TEXAS Metes and bounds description of all that certain 0.022 acre tract or parcel of land, lying and being situated in the Morgan Rector League, Abstract No. 46, College Station, Brazos County, "Texas and being a portion of Lot 1, Block One, Horse Haven Estates, Phase Five as depicted by plat recorded in VOLUME 9409 PAGE 183 of the Official Records of Brazos County, Texas; said 0.022 acre tract being more particularly described by metes and bounds as follows: COMMENCING: at a plastic capped %2" iron rod (stamped Taggart, RPLS # 5676) found for the southerly common corner of said Lot 1 and Lot 12, Block Three, Horse Haven Estates, Phase Three as depicted by plat recorded in VOLUME 7901 PAGE 165; THENCE: N 46' 09' 58" E — 0.26 feet along the southerly line of said Lot 1 to a point for the southwest corner of this tract and the PLACE OF BEGINNING: THENCE: N 12' 30' 41" W — 105.39 feet across the said Lot 1 and with the westerly line of a 10 foot wide public utility easement as shown on the plat of said Horse Haven Estates, Phase 3 to a point for the northwest corner of this easement and bbing in the southwest line of Lot 2; THENCE: S 44' 27' 05" E--18.90 feet with the said southwest lot line to a plastic capped %" iron rod (stamped Taggart, RPLS # 5676) found for the northeast corner of this tract; THENCE: S 12' 30' 41" E — 83.27 feet across said Lot 1 with the easterly margin of the said 10 foot public utility easement to a plastic capped %2" iron rod (stamped Taggart, RPLS # 5676) found for the southeasterly corner of this tract, and lying in the southeast line of said Lot; Page 1 of 2 000751-E04(3981) 12/11/2009 9:39 PM METES AND BOUNDS DESCRIPTION OF A 0.022 ACRE TRACT ONE, PUBLIC UTILITY EASEMENT FOR RELEASE LOT 1, BLOCK ONE HORSE HAVEN ESTATES, PHASE FIVE COLLEGE STATION, BRAZOS COUNTY, TEXAS Metes and bounds description of all that certain 0.022 acre tract or parcel of land, lying and being situated in the Morgan Rector League, Abstract No. 46, College Station, Brazos County, Texas and being a portion of Lot 1, Block One, Horse Haven Estates, Phase Five as depicted by plat recorded in VOLUME 9409 PAGE 183 of the Official Records of Brazos County, Texas; said 0.022 acre tract being more particularly described by metes and bounds as follows: COMMENCING: at a plastic capped'/z" iron rod (stamped Taggart, RPLS # 5676) found for the southerly common corner of said Lot 1 and Lot 12, Block Three, Horse Haven Estates, Phase Three as depicted by plat recorded in VOLUME 7901 PAGE 165; THENCE: N 46' 09' 58" E — 0.26 feet along the southerly line of said Lot I to a point for the southwest corner of this tract and the PLACE OF BEGINNING• THENCE: N 12' 30' 41" W — 105.39 feet across the said Lot I and with the westerly line of a 10 foot wide public utility easement as shown on the plat of said Horse Haven Estates, Phase 3 to a point for the northwest corner of this easement and being in the southwest line of Lot 2; THENCE: S 44' 27' 05" E --1890 feet with the said southwest lot line to a plastic capped %2" iron rod (stamped Taggart, RPLS # 5676) found for the northeast corner of this tract; THENCE: S 12' 30' 41" E — 83,27 feet across said Lot I with the easterly margin of the said 10 foot public utility easement to a plastic capped %" iron rod (stamped Taggart, RPLS # 5676) found for the southeasterly corner of this tract, and lying in the southeast line of said Lot; Page I of 2 0007514.04(3981) 12/11/2009 9:39 PM THENCE: S 46' 09' 58" W —11.71 feet with the southerly line of said Lot 1 to the PLACE Or BEGINNING and containing 0.022 acres of land. Refer to exhibit drawing issued simultaneously this date. BASIS Or BEARING: Plat of Horse Haven Estates, Phase Three as recorded in VOLUME 7901 PAGE 165 of the Official Records of Brazos County, Texas. December, 2009 Adams, Taggart and Associates College Station, Texas Prepared by: G Grego C. Tag rt� R.P S. No. 5 6 1 r� Or ��i q 5676 P eQ Page 2 of 000751 -f.04(398 1) 12/11/2009 9:39 PM