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HomeMy WebLinkAboutFire Flow AnalysisM ITCaH EALL MORGAN Erika Bridges December 3, 2012 City of College Station P.O. Box 9960 College Station, Texas 77842 RE: Lakeridge Replat — Fire Flow Analysis Dear Erika, As discussed we have run a fire flow for the proposed eight (8) inch waterline that we are constructing to Lot 2, Block 1 of the Lakeridge Subdivision. This fire flow analysis has made several assumptions for what will be constructed on the new lot. Our assumptions are that a small convenience store and gas station will be constructed on that lot. The building will be fully sprinklered and will be approximately 7,000 SF in size. The building type will be Type V-B construction and the maximum fire flow demand will be 1500 gpm. The attached run shows that given these assumptions the waterlines perform adequately and within the City design guidelines. Pipe 4046 is closed in this fire flow simulation run, which simulates the radial feed to Lot 2, Block 1 of the Lakeridge Living Subdivision. The 1500 gpm fire flow is placed on node 59340 which is the fire hydrant location and the maximum velocity occurs in line 3996, 4045 and 4044 and is 9.6 fps. The minimum pressure at the fire hydrant occurs at node 59340 and is 60 psi under fire flow conditions. Both of these parameters (velocity and pressure) are within proper design guidelines as the velocity is below the maximum 12 fps and the pressure is above the minimum 20 psi requirement during fire flow. have any questions please do not hesitate to call. UU(MI Veronica JB rg \ll iL VERONICA J B: MORGAN Managing Partner �i� o'. 77689 i� Ill.c�. cfsTeR.: 6�s 12-3-12 Attachment (1) Ittss/ONAA- ='Vitnt#f Cc: Jim Stewart, Lakeridge Living Matt Brown, Lakeridge Living Glenn Jones, J4 Engineering file 511 UNIVERSITY DRIVE EASE SUrrE 204 • COLLEGE STATION, TX 77840 • T. 979.260.6963 • F 979.260.3564 CIVIL ENGINEERING • HYDRAULICS • HYDROLOGY • UTILITIES • STREETS • SITE PLANS • SUBDIVISIONS info@mitchellandmcrgan.com • w .mitchellandmorgan.com A s� --b..ttll v\ 3 A \N F� "tl Imo: �— M 931 3813 9] 9= "Os A4S' b .a A m. a m i � Afl2fl I a ;.F g cMn I b_ '^ N b m g023 b._ b In b b ppw6f N fl � m F MA��.y✓ � m T ,?F0 u ?OG\ m 11 m q q M 6Fas b9D97b 9D3z s m mg095 � b m F III N - DRW h zsD T) £09£ mwH lnvnal �I 7 r/ 0 LL cr LL J 0 cr— J Results - Junctions' Time Level: 0; 0 day 0:00 hr Number of Junctions: 47(Selection) Junction lD Description Elevation Demand Grade Pressure Quality IN [gpm] IN [psi] 1774 WPIPEFIT 306.566 0.000 489.689 79.347 0.000 1777 WPIPEFIT ! 308.219 0.000 489.702 78.636 0.000 1827 WPIPEFIT 326.000 0.000 470.001 62.396 0.000 1875 WPIPEFIT 321.307 7.505 488.367 72.387 0.000 35312 flow hydrant 308.000 0.000 489.660 78.713 0.000 59300 324.000 0.000 466.585 61.782 0.000 59301 308.000 0.000 479.274 74.213 0.000 59302 311.000 5.650 478.030 72.374 0.000 59303 309.000 0.000 478.034 73.243 0.000 59304 308.000 6.680 479.846 74.461 0.000 59305 309.000 0.000 478.802 73.575 0.000 59306 310.000 6.680 477.356 72.515 0.000 59307 314.000 11.820 475.619 70.030 0.000 59308 314.000 11.820 474.971 69.749 0.000 59309 315.000 1500.000 473.824 68.819 0.000 59310 315.500 0.000 474.409 68.855 0.000 59311 316.500 0.000 474.854 68.615 0.000 59312 317.750 6.680 475.369 68.296 0.000 59313 312.000 0.000 477.126 71.549 0.000 59314 309.000 0.000 477.891 73.180 0.000 59315 315.500 6.680 476.200 69.631 0.000 59316 317.000 0.000 476.200 68.981 0.000 59317 312.500 13.360 476.618 71.112 0.000 Junction ID Description Elevation Demand Grade Pressure Quality [ft] [gpm] [ft] [psi] 59318 316.000 0.000 476.027 69.340 0.000 59319 311.000 11.310 477.648 72.209 0.000 59320 314.500 13.360 475.635 69.820 0.000 59321 317.500 0.000 475.660 68.531 0.000 59322 -119.500 0.000 475.394 67.549 0.000 59323 318.000 0.000 475.216 68.122 0.000 59324 318.000 16.440 475.055 68.052 0.000 59325 318.250 0.000 474.968 67.906 0.000 59326 318.500 0.000 474.932 67.782 0.000 59327 320.500 0.000 474.986 66.939 0.000 59328 323.500 11.310 474.934 65.616 0.000 59329 59331 59332 59333 59334 59335 59336 59337 59��R :)y33y 59,14n Jyj41 59342 319.750 6.170 474.986 475.274 67.264 65.330 0.000 0.000 324.500 0.000 322.500 19.530 475.313 66.214 0.000 324.500 0.000 481.80468.160 0.000 314.875 13.360 476.297 69.944 0.000 318.500 6.680 475.524 68.039 0.000 322.375 13.360 475.091 66.172 10.000 321.063 312.302 0.000 0.000 475.017 485.989 66.708 75.259 0.000 0.000 324.500 0.000 464.329 60.588 0.000 324.500 1500.000 462.807 59.928 0.000 324.500 324.500 0.000 0.000 475.241 475.246 65.316 65.318 0.000 0.000 Results - Pipes Time Level: 0; 0 day 0:00 hr Number of Pipes: 5 1 (Selection) Pipe Description Node Node Diameter Length Roughness Flow ID, 1 2 M17IMMIJUMM1 3999 4000 4001 4002 4003 4004 4005 4006 4007 11' 4009 4010 4011 4013 4014 4015 4016 4017 4018 [in] 1777 35312 18.000 1777 1774 18.000 1827 59300 8.000 59302 59303 4.000 59303 59301 8.000 59301 59304 8.000 59304 59305 8.000 59305 59306 8.000 59306 59307 8.000 59307 59308 8.000 59308 59309 8.000 59309 59310 8.000 59310 59311 8.000 59311 59312 8.000 59312 59334 8.000 59313 59314 8.000 59314 59303 8.000 59315 59316 4.000 59306 59317 4.000 59317 59318 4.000 59318 59315 8.000 59305 59319 6.000 59319 59315 6.000 [ft] [millift] 52.264 120.000 18.656 120.000 101.242 140.000 140.894 140.000 235.228 140.000 108.531 140.000 52.775 140.000 124.472 140.000 181.465 140.000 59.553 140.000 108.153 140.000 71.593 140.000 54.553 140.000 106.776 140.000 187.945 140.000 147.839 14 00 00 27.803 140.000 54.135 140.000 181.828 140.000 206.679 140.000 128.889 140.000 188.166 140.000 254.873 140.000 Velocity Headloss [gpm] MAI 1433.601 1.807 1331.495 1 1.679 1500.000 9.574 -5.650 -0.144 -550.351 -3.513 -550.351 -3.513 1123.859 7.173 843.529 5.384 759.621 4.848 814.572 5.199 802.752 5.124 697.248 -4.450 -697.248 -4.450 -524.661 -3.349 -531.341 -544.701 -544.701 0.000 77.229 63.869 -262.340 280.330 269.020 -3.391 -3.477 -3.477 0.000 1.972 1.631 -1.674 3.181 3.053 [ft] 0.042 0.013 3.416 0.005 1.239 0.572 1.043 1.446 1.737 0.649 1.146 IjWk, 0.000 0.738 0.590 0.172 1.154 MIEM pipe Description Node Node Diameter Length Roughness Flow Velocity Headloss ID 1 2 [in]-- [ft] [mmift] [gpm] MAI IN 4019 59307 59320 8.000 144.788 140.000 -66.772 -0.426 0.015 4020 59320 59321 8.000 168.891 140.000 -80.132 -0.511 0.025 4021 59321 59318 8.000 183.863 140.000 -326.209 -2.082 0.368 4022 59321 59335 8.000 114.112 140.000 246.077 1.571 0.135 4023 59322 59323 6.000 128.626 140.000 125.537 1.424 0.178 4024 59323 59324 6.000 116.023140.000 125.537 1.424 0.161 4025 59324 59325 6.000 81.655 140.000 109.097 1.238 0.087 4026 59325 59326 6.000 41.905 II140.000 97.787 1.110 0.037 4027 59326 59311 8.000 125.824 140.000 172.587 1.102 0.077 4028 59327 59329 4.000 39.244 140.000 0.000 10.000 0.000 4029 59325 59328 4.000 293.958 140.000 11.310 0.289 0.034 4030 59329 59326 6.000 102.409 140.000 74.800 0.849 0.054 4031 59329 59337 6.000 50.658 140.000 -80.970 -0.919 0.031 4032 59342 59331 8.000 136.745 140.000 -94.330 -0.602 0.027 4033 59331 59332 8.000 194.365 140.000 -94.330 -0.602 0.039 4034 59332 59322 8.000 287.152 140.000 -113-860 -0.727 0.082 4035 1875 59333 8.000 178.514 140.000 0.000 10.000 0.000 4036 59333 59341 8.000 336.096 140.000 0.000 0.000 0.000 4037 59334 59313 8.000 160.474 140.000 -544.701 -3.477 0.829 4038 59335 59322 8.000 115.230 140.000 239.397 1.528 0.130 4039 59336 59341 6.000 183.580 140.000 -94.330 -1.070 0.150 4040 59337 59336 6.000 119.971 140.000 -80.970 -0.919 0.074 4042 59338 1774 8.000 135.549 120.000 -1146.628 -7.319 3.700 4043 59304 59338 8.000 128.554 130.000 -1680.890 -10.729 6.144 4044 59300 59339 8.000 66.867 140.000 1500.000 9.574 2.256 Nide Node Description Diameter Length Roughness Flow Velocity I Headloss i IDe - - - - - [in] --[ft] - [millift] - [gpm] [ft/s] [ft] 4045 59339 59340 8.000 45.117 1140.000 1500.000 9.574 1.522 4046 59339 59341 8.000 271.705 140.000 0.000 0.000 0.000 4047 59341 59342 8.000 26.387 140.000 1-94.330 -0.602 0.005