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HomeMy WebLinkAboutTRAILHEAD - PDP - 43-02A - CORRESPONDENCE - REVISIONS (3)Proiject: Client: By: 75TC Chk. By: Subject: Job No: 3 A ( Date: -Z120 IOLA Sheet No: of ft) J-R ENGINEERING A Westrian Company Spot IE2A VK %A --lb (�k" Ir I, ftl A- I -L> MN-Z LA-5 01-' r1Z LZ -4? Mkk--S L'n 0-3 vvQ w AkO-T rk L4 - roA O-z) A414 -G*A -DM4 -(oS F AU N - (Ole CkSOCL V,.O L JA:10-S 0-6C>to r-VLJ _P! 77.5-10'. ratk-zo waa O.-S 0--7S SPD rvk kk- Zx -V M %6-Z3 AOL,) /-C)nCyb (. Zoe SPOa -7 &L k - Z -1 rLO C,) /C) 35 4> A. 14 - 3 4 b -7sb we, L., 1, 00 8 1of2 Accumulated Accumulated Pipe Manhole Peak Flows Peak Flows Size (Qom) (cfs) (in) Trail Head Sanitary Sewer Calculations Proposed Full Full ft Depth Slope Capacity Velocity Q/Qt p ,,Wq, Depth (ft/M (nfsl fff/0 wet« (in) d/D Velocity (ft/s) .*V Fb Wm. MH-40 MH-39 13.31 0.030 8 0.0050 0.857 2.454 0.035 0.085 1.020 0.128 1.15 MH-38 36.25 0.081 8 0.0050 0.857 2.454 0.094 0.139 1.668 0.209 1.54 MH-37 39.40 0.088 8 0.0050 0.857 2.454 0.102 0.144 1.728 0.216 1.58 MH-52 MH-52 40.44 0.090 8 0.0150 1.484 4.251 0.061 0.111 1.332 0.167 2.34 MH-36 124.54 0.277 8 0.0050 0.857 2.454 0.324 0.261 3.132 0.392 2.19 MH-51 MH-36 11.33 0.025 8 0.0135 1.408 4.033 0.018 0.062 0.744 0.093 1.54 MH-35 MH- 135.86 0.303 8 0.0070 1.014 2.904 0.299 0.250 3.000 0.375 2.53 MH-28 138.91 0.309 8 0.0070 1.014 2.904 0.305 0.253 3.036 0.380 2.54 MH-4 MH-45 813 0.018 8 0.0065 0.977 2.799 0.019 0.063 0.756 0.095 1.08 MH-44 11.66 0.026 8 0.0075 1.049 3.006 0.025 0.072 0.864 0.108 1.27 MH-41 12.71 0.028 8 0.0063 0.962 2.755 0.029 0.078 0.936 0.117 1.22 MH-43 MH-42 5.31 0.012 8 0.0075 1.049 3.006 0.011 0.050 0.600 0.075 1.00 MH-41 9.36 0.021 8 0.0050 0.857 2.454 0.024 0.072 0.864 0.108 1.03 MH-27 30.01 0.067 8 0.0040 0.766 2.195 0.087 0.133 1.596 0.200 1.35 MH-34 MH-33 3.28 0.007 8 0.0120 1.327 3.802 0.006 0.034 0.408 0.051 1.03 MH-32 16.55 0.037 8 0.0050 0.857 2.454 0.043 0.095 1.140 0.143 1.22 MH-31 B 22.54 0.050 8 0.0050 0.857 2.454 0.059 0.109 1.308 0.164 1.34 MH-31A 30.48 0.068 8 0.0050 0.857 2.454 0.079 0.127 1.524 0.191 1.46 MH-30 33.65 0.075 8 0.0075 1.049 3.006 0.071 0.121 1.452 0.182 1.74 MH-29 41.53 0.093 8 0.0075 1.049 3.006 0.088 0.134 1.608 0.201 1.85 MH-28 .44.68 0.100 8 0.0127 1.365 3.912 0.073 0.122 1.464 0.183 2.28 MH-27 183.59 0.409 8 0.0338 2.228 6.382 0.184 0.194 2.328 0.291 4.85 MH-7 .213.60 0.476 10 0.0040 1.389 2.547 0.343 0.337 4.044 0.404 2.30 Future MH-54 MH-613 15.30 0.034 8 0.0350 2.267 6.494 0.015 0.057 0.684 0.086 2.35 Future MH-55 MH-6B 15.30 0.034 8 0.0350 2.267 6.494 0.015 0.057 0.684 0.086 2.35 Future MH-56 MH-6A 12.12 0.027 8 0.0350 2.267 6.494 0.012 0.051 0.612 0.077 2.20 Future MH-57 MH-6A 19.24 0.043 8 0.0350 2.267 6.494 0.019 0.064 0.768 0.096 2.53 Future MH-58 MH-4 13.31 0.030 8 0.0350 2.267 6.494 0.013 0.054 0.648 0.081 2.27 Future MH-59 MH-4 17.27 0.038 8 0.0350 2.267 6.494 0.017 0.060 0.720 0.090 2.43 MH-53 MH-14 5.31 0.012 8 0.0185 1.648 4.721 0.007 0.041 0.492 0.062 1.37 MH-26 MH-25 3.28 0.007 8 0.0120 1.327 3.802 0.006 0.034 0.408 0.051 1.03 MH-24 13.37 0.030 8 0.0065 0.977 2.799 0.030 0.080 0.960 0.120 1.26 MH-23 22.56 0.050 8 0.0065 0.977 2.799 0.051 0.103 1.236 0.155 1.47 MH-22 33.65 0.075 8 0.0100 1.212 3.471 0.062 0.113 1.356 0.170 1.92 MH-21 39.57. 0.088 8 0.0108 1.259 3.607 0.070 0.119 1.428 0.179 2.07 MH-13 49.37 0.110 8 0.0300 2.099 6.012 0.052 0.104 1.248 0.156 3.17 Pipe Size, Capacity 8 Depth Sanitary Calcs.xls 2/20/2004 JTC " Manhole MH-40 Single FamilyFamily Multi Y Trail Head Sanitary Sewer Calculations Infiltration Infiltration Peakin Commercial People g (gpd) (gpm) Factor Peak Flow (gpd) Peak Flow (gpm) Accumulated Peak Flows (gpm) 1of2 Accumulated Peak Flows (cfs) MH-39 13 33 1237.5 0.859 4.35 19173 13.31 13.31 0.030 MH-38 7 16 58 2175 1.510 4.25 33021 22.93 36.25 0.081 MH-37 3 8 300 0.208 4.24 4545 3.16 39.40 0.088 MH-52 MH-37 1 0 0 0.000 4.31 1500 1.04 40.44 0.090 MH-36 4 1 10 375 0.260 4.10 121098 84.10 124.54 0.277 MH-51 MH-36 3 8 28 1050 0.729 4.36 16308 11.33 11.33 0.025 MH-36 MH-35 0 0 0.000 4.09 0 0.00 135.86 0.303 MH-28 3 8 300 0.208 4.08 4382 3.04 138.91 0.309 MH-46 MH-45 8 20 750 0.521 4.38 11701 8.13 8.13 0.018 MH-44 4 10 375 0.260 3.77 5083 3.53 11.66 0.026 MH-41 MH-43 MH-42 MH-41 MH-27 1 3 112.5 0.078 3.74 1514 1.05 12.71 0.028 5 13 487.5 0.339 4.40 7642 5.31 5.31 0.012 4 10 375 0.260 4.37 5840 4.06 9.36 0.021 8 20 750 0.521 4.27 11436 7.94 30.01 0.067 MH-34 MH-33 3 8 300 0.208 4.42 4723 3.28 3.28 0.007 MH-32 5 8 33 1237.5 0.859 4.33 19104 13.27 16.55 0.037 MH-31 B 2 4 15 562.5 0.391 4.30 8633 6.00 22.54 0.050 MH-31A 4 4 20 750 0.521 4.27 11436 7.94 30.48 0.068 MH-30 13 8 300 0.208 4.26 4564 3.17 33.65 0.075 MH-29 8 20 750 0.521 4.24 11347 7.88 41.53 0.093 MH-28 t3 8 300 0.208 4.23 4530 3.15 44.68 0.100 MH-27 MH-7 0 0 0.000 4.02 0 0.00 183.59 0.409 0 0 0.000 3.98 0 0.00 213.60 0.476 Future MH-54 MH-613 15 38 1425 0.990 4.34 22027 15.30 15.30 0.034 Future MH-55 MH-6B 15 38 1425 0.990 4.34 22027 15.30 15.30 0.034 Future MH-56 MH-6A 12 30 1125 0.781 4.35 17455 12.12 12.12 0.027 Future MH-57 MH-6A 19 48 1800 1.250 4.32 27710 19.24 19.24 0.043 Future MH-58 MH-4 13 33 1237.5 0.859 4.35 19173 13.31 13.31 0.030 Future MH-59 MH-4 17 43 1612.5 1.120 4.33 24873 17.27 17.27 0.038 MH-53 MH-14 5 13 487.5 0.339 4.40 7642 5.31 5.31 0.012 MH-26 MH-25 3 8 300 0.208 4.42 4723 3.28 3.28 0.007 MH-24 10 25 937.5 0.651 4.35 14525 10.09 13.37 0.030 MH-23 9 23 862.5 0.599 4.30 13238 9.19 22.5 00.050 MH-22 11 28 1050 0.729 4.26 15972 11.09 33.65 0.075 MH-21 6 15 562.5 0.391 4.24 8521 5.92 39.57 0.088 MH-13 10 25 937.5 0.651 4.22 14115 9.80 49.37 0.110 Flow Calculations Sanitary Calcs.xls - 2/20/2004 JTC Details Sheet: • Boxelder sanitary sewer details are not included. Please incorporate them into the plans. AutoCAD drawings are included on floppy disk sent herewith. Response: Comment has been addressed. Overall Utility Plans: • Please show pipe diameter, pipe length, and slope of sanitary sewer lines (Sheets 11 through 17). Response: Comment has been addressed. For information regarding the slope of the sanitary sewer lines, please refer to the sanitary sewer plan and profile sheets. Sheet 18: • Move MH 10 just a little to the west, and MH 11 closer to the street center -line. Response: In order to maintain IO' between sanitary sewer lines and water lines MH 10 and 11 remained in place. MH 9 was moved in order to move the sanitary sewer line out from under the curb and gutter. Sheet 19: • Pipeline lengths do not match between plan and profile, between MH 4 and existing MH. Response: Text has been updated to match plan and profile. • Also, MHs 4 and 5 are sticking out of the ground. Response: Rim elevations now reflect proposed ground surface. Sheet 20: • Profile shows an 8" water line conflicting with the sanitary sewer line. Response: All crossings are now shown and all conflicts have been identified and resolved. • MH 46 to be moved away from flowline. Response: MH 46 has been moved away from the flowline. Sheets 22 and 23: • May be able to eliminate two manholes (e.g., #26 and #22) by having longer pipe length runs (e.g., <_ 400 ft.) and repositioning MH 21. Response: Manhole #26 and #22 are at bends. Therefore, all manholes have remained. March 2, 2004 Ravindra M. Srivastava, Ph.D., P.E. Boxelder Sanitation District General Manager 2217 Airway Ave. #3 P.O. Box 1518-2217 Fort Collins, CO 80522 RE: Trail Head PDP— Type 1 (LUC) #32-01B&C Dear Mr. Srivastava: J-R ENGINEERING A Wastrian Company This letter is in response to the staff project review comments dated 01-20-2004. Our responses; in italics, follow the City comments. Number: 1 Hydraulic analysis conducted by the district (BSD assumptions: 2.5 persons/household, 100 gal/person/day wastewater generation, ASCE peaking factor of {I 8+sqrt (popul/1000)]/[4+sgrt(popul/1000)], pipes —< 15 in. diameter to flow no higher than half full at peak flow, PVC Manning friction factor 0.014 indicates portions of the sanitary sewer system, as designed, are undersized. This is a definite problem at MH 2 and downstream pipeline sections, and may be a potential problem from MH 7 and some downstream pipeline sections. Please revisit your hydraulic computations and advise on design changes. A copy of your hydraulic analysis would be appreciated, including design flow assumptions for residential and common/commercial facilities. Response: Comment addressed, we have analyzed the sanitary sewer system (see attached spreadsheet) and upsized several pipes and increased slopes on several runs (see attached handwritten sanitary sewer changes table). Assumptions are also listed on the attached spreadsheet. 2620 Latst Prospect Road, Suite 190, Fort Collins, CO 80525 970-491-9888 • Fax: 970-491-9984 • wJrenginccringxom