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HomeMy WebLinkAboutSDP201400006 Calculations 2014-10-17 Sarah Baldwin From: Jeremy Lynn [jlynn@serviceauthority.org] Sent: Friday, October 17, 2014 10:50 AM To: 'Alan Franklin, PE'; 'Steve Edwards'; Sarah Baldwin Cc: 'Alan Franklin' Subject: RE: Willow Glen Phase 2 Attachments: 20141017104347797.pdf Alan, You are correct. Attached are the resubmitted fire flow calculations. I think the only remaining items is the improve the hydrant spacing, which Steve and I both think can be accomplished with one additional fire hydrant. Jeremy M. Lynn, P E. Senior Civil Engineer Albemarle County Service Authority 168 Spotnap Road, Charlottesville, VA 22911 (434) 977-4511 ext. 114 From: Alan Franklin, PE [mailto:alan©alanfranklinpe.com] Sent: Friday, October 17, 2014 10:46 AM To: 'Jeremy Lynn'; 'Steve Edwards'; 'Sarah Baldwin' Cc: 'Alan Franklin' Subject: RE: Willow Glen Phase 2 Jeremy, I thought we re-ran the fire flow test and updated the fire flow calculations. Did we not? I find where we updated the fire flow calculations and I'm not sure why we would have done that without new fire flow data since that was the comment we were addressing for the fire marshal. I am still searching my records. Alan From:Jeremy Lynn [mailto:ilynn@serviceauthority.org] Sent: Friday, October 17, 2014 9:00 AM To: 'Steve Edwards'; 'Sarah Baldwin' Cc: 'Alan Franklin PE, LLC'; 'Alan Franklin' Subject: RE: Willow Glen Phase 2 Steve, We are in agreement with your statement below. Jeremy M. Lynn, P.E. Senior Civil Engineer Albemarle County Service Authority 168 Spotnap Road, Charlottesville, VA 22911 (434) 977-4511 ext. 114 From: Steve Edwards [mailto:swedwards8168©gmail.com] Sent: Friday, October 17, 2014 8:53 AM To: Jeremy Lynn; Sarah Baldwin Cc: Alan Franklin PE, LLC; Alan Franklin Subject: Re: Willow Glen Phase 2 Jeremy, 1 It appears to me that 97% are within DUO. There is only 3 that might fall out ,..at criteria but depending on where you pull the lines, it falls really down to 1 hydrant that exceeds the 500 if requirement. It's the distance between the clubhouse and the intersection of Prestwick and Tradeau. We can shift the one at the clubhouse back towards Shannon Glen Drive and add another somewhere in the field along Heathrow Glen Circle and have it reflected on the as-builts. This would certainly save everyone time, money and resources. Steve On Thu, Oct 16, 2014 at 3:25 PM,Jeremy Lynn<jlynn@serviceauthority.org>wrote: Steve, I went back to the approved plans and it appears that our approval still uses the old spacing of 800 feet. The Fire Department recently revised the spacing to 500 feet and it doesn't appear that Alan and I updated the spacing. Do you want to handle this as a field change or do you think we need to update the plans to show additional hydrants? Jeremy M. Lynn, P.E. Senior Civil Engineer Albemarle County Service Authority 168 Spotnap Road, Charlottesville, VA 22911 (434) 977-4511 ext. 114 2 AlboinatioCountyDate`of Report Service Hydrant Flow tcuthrlty Y 7,14/2014 166QpotAapRoad Chectotierts,VA 229„ (444)27746t1 Location (Dickerson Rd Date and Time of Test 7/14/2014 10:40:00 AM Minutes of Flow 4 Pipe Size(In) 12 Pressure Hydrant 116811 Static Pressure(psi) 100'. Residual Pressure(psi) 69 Flow Hydrant#1 12296 Pitot Pressure#1(psi) 641 Test Flow#1(gpm) ; 1,118 I Flow Hydrant#2 11680 Pitot Pressure#2(psi) 56 Test Flow#2(gpm) 1,046 Flow Hydrant#3 1 Pitot Pressure#3(psi) 0 Test Flow#3(gpm) 01 Total Estimated Flow(gpm) - 2,164 Estimated Consumption (gal) 8,656 AWWA Q20 Calculation (gpm 3,610 (Value of zero indicates insufficient pressure drop for calculation) Comments Hydrants opened all the way For method of calculating pltot flow with a diffuser:see eq.13,Waiski and Lutes article 1990 Journal Management and Operations AWWA (All tests conducted using 2.5 discharge outlet unless otherwise spe ifled) Signature of Tester: Albemarle County a qN r 10604 N Service AUthOri R" �:a. at �N a sill w ivw 1 . Saying 6 Gowning '� / 1 fib' -/ S �, l , ' lI i / Flow Hydrant o' �.> Il'ILegend 1189 //// 4 * wnydnnc // Enabled \�' 'a � byr �� �,� ,.. ;' tin Service 4t� 44": �1189 4147. �� ♦ , 1 IISI Not In Service `\• '+' 41 wMain r'V '-Et' ir ]11899 Ownership / 1►/Al ACSA \ MEW Private Ownership '/' ' it RWSA_GIS_OBO wMain `I (' Utility"type 168 I — . 0 . �Potade Water • / / RewwaterGauge Hydrant ',.: 1�csro / 440 - titer, / . * /4:141411°. 189: °�:�' rFiii. h —71N:\ r litat. 11226• iq.< .i,,.s N.'-;:.; /441111111Z4wir ta 1293G �/;• ' k` 4. 226' ej. '3 Not - 226 �•, Flow Hydrant rn a " ! 4 r c* ' r fr " 4* la a �n�'• 12�4�9• ,1234',- `'" 4 a .112296 V a' ;s f9., ..w-e1e. �/ lei 7:: :';15,‘ 4/ . pie* .sf ��1168�•J�„ 4� �4 oy, / iv a J• l *1168; �R vo ,pimL.4 ` o� \ 4ui"/ . 1229 , ; DISCLAIMER {_ �� > ��,• O� Utilities,structures,lot lines,and all appurtenances indicated on this map .m ♦ * / �k Y 23 r�0 are intended for general layout and reference location only. This printout ~+� e. *P ! l! s' is not intended for any other use than for preliminary planning and general i °'• 'Si Lti 5� location purposes. The utilities shown on this map are believed to be 8. 1168 L r,. ' �, ',� a O accurate,however,recent utility improvements and/or system changes , �;! G74N . may have been updated in our mapping since the time of this printout A, / 1741 slr,•,�� _ Contact ACSA directly for specific utility locations. J F j Aerial Imagery®2007 Commonwealth of Virginia R airN � r 1168 Feet Parcel Information Property of County ofAlbemarle ie •. 0 145 290 580 870 ,. ft.. , *It /1 1 h�n'A or s r V( 1 li l FIRE FLOW CALCULATION WORK SHEET Project: Willow Glen Location: Dickerson Road across from airport Date: 7/22/2014 Engineer: AGF Alan Franklin PE, LLC TEST HYDRANT INFORMATION(From ACSA) Location: Dickerson Road ACSA Hydrant#11681 Test Hydrant Elevation: 568 ft. Residual Pressure: 69 psi Static Pressure: 100 psi Flow: 2164 gpm Test Q 20. 3611 gpm HAZEN-WILLIAMS FRICTION LOSSES FROM TEST HYDRANT TO PROPOSED HYDRANT: Waterline EX A FHA Pipe Diameter(in) 12 8 6 Pipe"C"Value 120 120 120 Pipe Flow 2164 2164 2164 L ; Pipe Loss/100 FT 1.2213 IIII 8.7980 35.7136 Pipe Length(ft) 75 11111 96 4 L _I Total Pipe Loss 0.92 IM8.45 ! 1.43 ri PROPOSED HYDRANT INFORMATION Location: FHA#1(END OF HARTSFIELD COURT) Elevation: 570.00 ft. Residual Losses(ft): 10.79 ft Residual Losses(psi): 4.67 psi Total Residual Pressure: 63 psi Total Static Pressure: 99 psi Proposed Qzo= 3328 gpm FIRE FLOW CALCULATION WORK SHEET Project: Willow Glen Location: Dickerson Road across from airport Date: 7/22/2014 Engineer: AGF Alan Franklin PE,LLC TEST HYDRANT INFORMATION(From ACSA) Location: Dickerson Road ACSA Hydrant#11681 Test Hydrant Elevation: 568 ft. Residual Pressure: 69 psi Static Pressure: 100 psi Flow: 2164 gpm Test Q 20= 3611 gpm HAZEN-WILLIAMS FRICTION LOSSES FROM TEST HYDRANT TO PROPOSED HYDRANT: Waterline EX MI A 7-1 FHA 7-- j Pipe Diameter(in) 12 MI 8 I 6 Pipe"C"Value 120 120 L__I 120 i_ —L __ i Pipe Flow 2164 - 2164 2164 Pipe Loss/100 FT 1.2213 - 8.7980 j 35.7136 IL— -;__ Pipe Length(ft) 75 1111 442 j 1 13 Total Pipe Loss 0.92 - 38.89 j 4.64 P PROPOSED HYDRANT INFORMATION Location: FHA#2(INTX.HARTSFIELD/PRESTWICK) Elevation: 563.00 ft. Residual Losses(ft): 44.45 ft Residual Losses(psi): 19.24 psi Total Residual Pressure: 52 psi Total Static Pressure: 102 psi Proposed Q20. 2822 gpm FIRE FLOW CALCULATION WORK SHEET Project: Willow Glen Location: Dickerson Road across from airport Date: 7/22/2014 Engineer: AGF Alan Franklin PE, LLC TEST HYDRANT INFORMATION(From ACSA) Location: Dickerson Road ACSA Hydrant#11681 Test Hydrant Elevation: 568 ft. Residual Pressure: 69 psi Static Pressure: 100 psi Flow: 2164 gpm Test Q 2 . 3611 gpm HAZEN-WILLIAMS FRICTION LOSSES FROM TEST HYDRANT TO PROPOSED HYDRANT: Waterline EX A 1 FHA Pipe Diameter(in) 12 11111 8 6 - _ Pipe"C"Value 120 11.11 120 120- Pipe Flow 2164 2164 2164 Pipe Loss/100 FT 1.2213 - 8.7980 35.7136 Pipe Length(ft) 75 1111 1047 LJ 28 _ Total Pipe Loss 0.92 - 92.11 10.00 -I PROPOSED HYDRANT INFORMATION Location: FHA#3(CLUBHOUSE) Elevation: 553.15 ft. Residual Losses(ft): 103.03 ft Residual Losses(psi): 44.60 psi Total Residual Pressure: 31 psi Total Static Pressure: 106 psi Proposed Q20a 2326 gpm FIRE FLOW CALCULATION WORK SHEET Project: Willow Glen Location: Dickerson Road across from airport Date: 7/22/2014 Engineer: AGF Alan Franklin PE, LLC TEST HYDRANT INFORMATION(From ACSA) Location: Dickerson Road ACSA Hydrant#11681 Test Hydrant Elevation: 568 ft. Residual Pressure: 69 psi Static Pressure: 100 psi Flow: 2164 gpm Test Q 20.. 3611 gpm HAZEN-WILLIAMS FRICTION LOSSES FROM TEST HYDRANT TO PROPOSED HYDRANT: Waterline EXEllA+B FHA Pipe Diameter(in) 12 MI 8 T 6 -� Pipe"C"Value 120 MI 120 I 120 r Pipe Flow 2164 - 2164 L 2164 Pipe Loss/100 FT 1.2213 8.7980 L. 35.7136 - -__ Pipe Length(ft) 75 No 928 I--J 11 Total Pipe Loss 0.92 81.65 i 3.93 PROPOSED HYDRANT INFORMATION Location: FHA#4(INTX. PRESTWICK/TRUDEAU) Elevation: 559.75 ft. Residual Losses(ft): 86.49 ft Residual Losses(psi): 37.44 psi Total Residual Pressure: 35 psi Total Static Pressure: 104 psi Proposed Q20 2410 gpm