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Home My WebLink AboutFire Flow Status 'ern MITCHELL M MORGAN City of College Station 30 January 2015 Development Services P.O. Box 9960 College Station,Texas 77842 Attn: Kevin Ferrer RE: Fire Flow Status,Center for Alternative Learning Project Dear Kevin, The following fire flow information is being provided for the Center for Alternative Learning(CAL) building construction on George Bush Drive in College Station. A 396 LF 8"waterline was designed to meet the needs of CAL. The waterline was later rerouted due to a conflict with a portable building that will be needed as a temporary facility during construction. A new waterline placement was designed but required an increase in pipe length. The length of the rerouted waterline is 703 LF. As shown in the previous water model dated October 2014 for this project,the 396 LF meets the requirements set in the BCS design standards for pressures and velocities. The worst case scenario modeled for CAL was fire flow of 1250 GPM placed at nodes C.A.L.-3 &4 during peak day demand. This scenario was modified by increasing the length of the 8" WL to 703 LF. Attached are the results (junction&nodes)from this model. As you can see the pressure slightly decrease,and there was no change in velocities of the pipe. The proposed waterline reroute will meet the BCS design requirements of 12 ft/sec velocities maximum and 20 psi pressure minimum. Pleas- et me know if you have any questiogrs•:•%‘hi‘‘ .t Tha! ou, :* .. OF rFX`s *f+ll /V i * : . �� • * `� �� , ,L1 VERONICA J.B.MORGAN -01 77689 icr Veronica J.B. , `o.:� � 1t �s"T"Eµ` �Mana in Partner 1tusiONA` Cc: file 3204 EARL RUDDER FWY.S. • COLLEGE STATION,TX 77845 • T 979.260.6963 • F 979.260.3564 CIVII FNnINFFRINC• • HVIIRAIII ICC • HVf)Rfll nr,,V • IITII ITIFC • CTRFFTC • CITF PI ANC • CIIRnivicioNC EXHIBIT A MikeURBAN Node Identifiers Description: Steady State Analysis- Existing peak day demand on the system with CSISD- Center for Alternative Learning demand with waterline increased to 703 L.F., and 1250 gpm fire flow added to nodes C.A.L.-3 and C.A.L.-4 Node Results Demand Pressure Name (gpm) (psi) 508 12.891 71.87743 567 4.182 76.00895 572 0 75.79523 573 5.156 75.81062 591 0 74.12515 601 7.505 76.13941 604 5.271 76.28098 611 0 73.26386 614 0.974 70.62386 615 0 70.98313 643 0 67.43726 647 5.042 59.8242 651 0 68.82667 657 7.162 64.71566 659 10.313 56.49503 665 3.953 68.04424 673 2.349 66.88825 674 5.844 60.68788 677 3.266 59.99247 684 4.87 60.87565 702 23.661 64.48981 C.A.L.-1 0 59.1366 C.A.L.-2 143 53.96941 C.A.L.-3 1250 53.3316 C.A.L.-4 1250 61.44328 J-023 0 63.2758 J-024 0 59.33034 J-025 0 60.54472 CSISD-Center for Alternative Learning Exhibit A EXHIBIT B MikeURBAN Link Identifiers Description: Steady State Analysis- Existing peak day demand on the system with CSISD- Center for Alternative Learning demand with waterline increased to 703 L.F., and 1250 gpm fire flow added to nodes C.A.L.-3 and C.A.L.-4 Link Results Velocity Headloss/1000 Roughness Friction Name Diameter(in) (ft/s) (ft) (millift) Factor 108 8 2.603449 6.856911 90 0.043433 110 8 2.521168 6.461048 90 0.043641 121 6 1.223366 1.044889 140 0.022481 135 6 2.65177 9.924785 90 0.045447 16 8 3.301372 8.758062 100 0.034499 2080 8 1.985207 4.149461 90 0.045204 2087 6 0.989822 0.809724 130 0.026612 23-A 6 3.160399 6.060151 140 0.019537 23-B 6 3.160399 6.060241 140 0.019537 2459 0.75 0.600946 5.914154 100 0.065915 2460 6 1.14131 2.082678 90 0.051484 2461 6 1.105845 1.964489 90 0.051727 2588-A 16 2.354735 1.488214 120 0.023046 2588-B 16 2.354735 1.487894 120 0.023042 26 6 0.97877 0.689802 140 0.023186 2631 6 1.409723 1.358778 140 0.022016 27 6 0.989822 1.599858 90 0.05258 28 8 2.084615 2.804093 140 0.020778 3350 16 2.172949 1.282537 120 0.023323 3351-A 16 2.791121 2.038996 120 0.022474 3351-B 16 0.568318 0.070815 150 0.018826 3351-C 16 1.4263 0.588081 120 0.024822 3351-D 16 1.4263 0.588087 120 0.024822 3830 6 2.084615 6.355893 90 0.047095 3831 6 1.067598 1.514213 100 0.042778 3835 6 0.989822 1.600068 90 0.052587 456 6 2.003346 2.605064 140 0.020901 64 6 0.97877 0.691369 140 0.023238 849 6 1.315686 2.229791 100 0.041478 850 6 1.260426 2.503127 90 0.050734 854 8 2.148601 3.953179 100 0.036764 865 8 2.541982 6.558892 90 0.043579 CSISD-Center for Alternative Learning Exhibit B EXHIBIT B MikeURBAN Link Identifiers Link Results Velocity Headloss/1000 Roughness Friction Name Diameter(in) (ft/s) (ft) (millift) Factor 866 8 2.574892 5.526754 100 0.035789 867 6 1.14655 1.723796 100 0.042224 98 8 2.622795 5.718907 100 0.035693 C.A.L.-FH 8 7.978474 21.18485 150 0.014288 C.A.L.-WL 8 8.891212 25.8908 150 0.014061 CSISD-Center for Alternative Learning Exhibit B EXHIBIT C MikeURBAN Layout Description: Steady State Analysis- Existing peak day demand on the system with CSISD- Center for Alternative Learning demand with waterline increased to 703 L.F., and 1250 gpm fire flow added to nodes C.A.L.-3 and C.A.L.-4 / .; j /:\i/I/NN i,' \/N'N//: NJ �;t / ::, ' �\t:\/r . f N\'� /////1� f 7,,,,,:,..7:: CSISD-Center for Alternative Learning Exhibit C