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HomeMy WebLinkAboutTamana Fields stormwater calc Tamana Fields Commercial Subdivision University Blvd and Mikan Dr Stormwater Area and Calculations ALG N - I T D S T P - 7 8 6 6 ( 1 0 1 ) PC : 1 1 4 + 4 3 . 7 0 AL G N - I T D S T P - 7 8 6 6 ( 1 0 1 ) P T : 1 1 7 + 5 9 . 6 4 A L G N - I T D S T P - 7 8 6 6 ( 1 0 1 ) P C : 1 2 1 + 5 7 . 8 4 109 110 111 112 113 114 115 116 117 118 119 120 121 122 10 11 12 13 14 15 16 17 1818 AL G N - O F F S I T E U T I L I T Y EP : 1 8 + 0 0 N:7 7 8 4 4 7 . 9 7 E:7 5 2 2 4 5 . 0 5 0 1 2 3 4 5 6 7 8 9 10 1111 ALGN - MIKAN DRBOP:0+50N:778984.84 E:752166.88 ALGN - MIKAN DR EP:11+00N:777934.84 E:752166.88 IR IR IR IR WS WS SS SS WS ALGN - ITD STP-7866(101)54.77ALGN - ITD STP-7866(101) STA: 117+26.64OFF: 0.00 ALGN - ITD STP-7866(101)STA: 117+67.41 OFF: 0.00 ALGN - ITD STP-7866(101)STA: 118+25.64 OFF: 0.00 ALGN - ITD STP-7866(101)STA: 118+83.88OFF: 0.00 58.44 59.81 59.21???59.28 ALGN - ITD STP-7866(101) STA: 120+91.84OFF: 0.00 ALGN - ITD STP-7866(101) STA: 121+90.84OFF: 0.00 2 . 0 0 % 3. 4 0 % ALGN - ITD STP-7866(101)STA: 116+02.29OFF: 0.0059.4759.4359.0658.66 2 . 0 0 % 0. 0 0 % 2. 0 0 % 3 . 4 0 % 3. 4 0 % 2. 0 0 % 0.0 0 % 2.0 0 %58.7558.6658.6658.8458.9458.2658.5257.9757.1556.324855 4853 4854 4855 4855 4854 4855 4856 4855 4856 4856 48 5 7 4858 4857 4858 4855 4858 4858 4859 4857 4860 4856 4859 4860 4856 48 5 8 4 8 5 7 48 5 5 48 5 5 485 5 4 8 5 6 485 4 485 3 48 5 3 48 5 4 48 INCH CYLINDRICAL STRUCTURE-11 STA: 6+33.62 OFF: 31.00 RRIM: 4852.77 INV OUT: 4848.61 12 " S T R M DRAIN AREA 1 17,500 SQ. FT. DRAIN AREA 2 12,800 SQ. FT. DRAIN AREA 3 52,170 SQ. FT. Peak flow rate for Tamona Fields Rational Method Q=CiA 100 year (post)100 year (pre) C = 0.95 for a roadway (asphalt)C = 0.1 for a roadway (asphalt) i = 1.5 in/hr for 100 year/1 hour storm event i = 1.5 in/hr for 100 year/1 hour storm event Area 1 = 0.4 acres = 17,500sf Area 1 = 0.4 acres = 17,500sf Q (100 year) =0.57 cfs Q (100 year) =0.06 cfs C = 0.95 for a roadway (asphalt)C = 0.95 for a roadway (asphalt) i = 1.5 in/hr for 100 year/1 hour storm event i = 0.1 in/hr for 100 year/1 hour storm event Area 2 = 0.29 acres = 12,800sf Area 2 = 0.29 acres = 12,800sf Q (100 year) =0.41 cfc Q (100 year) =0.03 cfc C = 0.95 for a roadway (asphalt)C = 0.95 for a roadway (asphalt) i = 1.5 in/hr for 100 year/1 hour storm event i = 0.1 in/hr for 100 year/1 hour storm event Area 3 = 1.20 acres = 52,170sf Area 3 = 1.20 acres = 52,170sf Q (100 year) =1.71 cfs Q (100 year) =0.11 cfs 25 year (storage)Storage Required for 25 year event C = 0.95 for a roadway (asphalt) i = 1.1 in/hr for 25 year/1 hour storm event V=1/2* Qp*Td td is duration in seconds Area 1 = 0.4 acres = 17,500sf V=1/2* (Qp-Qo)*Td Qo= allowable outflow Q (25year) =0.42 cfs V (area 1) =752.40 cf # storm tech 740 chambers 10 C = 0.95 for a roadway (asphalt)V (area 2) =545.49 cf i = 1.1 in/hr for 25 year/1 hour storm event # storm tech 740 chambers 7 Area 2 = 0.29 acres = 12,800sf V (area 3) = 2252.80 cf # storm tech 740 chambers 30 Q (25year) =0.30 cfc C = 0.95 for a roadway (asphalt) i = 1.1 in/hr for 25 year/1 hour storm event Area 3 = 1.20 acres = 52,170sf Q (25year) =1.25 cfs