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Drainage Report 5.76 AcresDRAINAGE REPORT DEACON CONDOMINIUMS NORTHWEST SECTION 5.76 ACRES COLLEGE STATION, BRAZOS COUNTY, TEXAS NOVEMBER, 2001 REVIEWED FOB ~ COMPLI~ DEC 03 2~ COLLEGE STATION ENGINEERING '·' t.•.: FILE . SUBMITTED BY: MICHAEL G. HESTER, P.E . HESTER ENGINEERING COMPANY 7607 EASTMARK DRIVE, SUITE 253-B COLLEGE STATION, TX 77840 (979) 693-1100 FX:(979) 693-1075 DEACON CONDOMINIUMS -PAGE 1 I ( Tributary Area ("A"): S.76 Acres Pervious Area: S.76 Acres c = 0.30 Impervious Area: 0.00 Acres c = 0.90 Run-Off Coefficient ("Cwt'1: 0.30 Time Of Concentration ("Tic"): Woodlands: Low Elevation: 0.00 High Elevation: 0.00 Distance (Feet): 0.00 Slope(% Grade): 0.00 Velocity ("Vw'l 0.00 Feet I Second Time : 0.00 Minutes Pastures: Low Elevation: 298.93 High Elevation: 306.40 Distance (Feet): 436.00 Slope (% Grade): 1.71 Velocity ("Vp'l 1.43 Feet I Second Time : S.09 Minutes Pavements: Low Elevation: 0.00 High Elevation: 0.00 Distance (Feet): 0.00 Slope(% Grade): 0.00 Velocity ("Vpave"): 0.00 Feet I Second Time : 0.00 Minutes Total Travel Time: S.09 Minutes Rounded Travel Time: 10 Minutes Hourly Intensity Rates ("I"): 2-Year: 6.33 Inches I Hour S-Year: 7.69 Inches I Hour 10-Year: 8.63 Inches I Hour 25-Year: 9.86 Inches I Hour SO-Year: 11.1S Inches I Hour 100-Year: 11 .64 Inches I Hour Peak Discharge Rate ("Q"): 2-Year: 10.93 Cubic Feet I Second S-Year: 13.29 Cubic Feet I Second 10-Year: 14.92 Cubic Feet I Second 2S-Year: 17.04 Cubic Feet I Second SO-Year: 19.26 Cubic Feet I Second 100-Year: 20.11 Cubic Feet I Second DEACON CONDOMINIUMS • PAGE 2 Tributary Area (" A'l 5.76 Acres Pervious Area: 2.51 Acres Impervious Area: 3.25 Acres Run-Off Coefficient f'cwt"): 0.64 Time Of Concentration f'T/cj: 1 O Minutes Hourly Intensity Rates ("I"): 2-Year: 6.33 5-Year: 7.69 10-Year: 8.63 25-Year: 9.86 50-Year: 11.15 100-Year: 11 .64 Peak Discharge Rate ("Q"): 2-Year: 23.26 5-Year: 28.28 10-Year: 31.75 25-Year: 36.26 SO-Year: 40.99 100-Year: 42.79 c = 0.30 C= 0.90 Inches I Hour Inches I Hour Inches I Hour Inches I Hour Inches I Hour Inches I Hour Cubic Feet I Second Cubic Feet I Second Cubic Feet I Second Cubic Feet I Second Cubic Feet I Second Cubic Feet I Second Predevelopment Post-Development Increase In Peak % Increase 2-Year: 5-Year: 10-Year: 25-Year: 50-Year: 100-Year: 10.93 Ft3/sec 13.29 Ft3/sec 14.92 Ft3/sec 17.04 Ft3/sec 19.26 Ft3/sec 20 .11 Ft3/sec L _•_r_.:.e._:t·. A_Ji_:._P.n _••• •. 1•_!!_ :_ag,,_)_:¥_ •.• ~.•.:_ •.•.• _•(J.·Dete_,_•.•0··•.• .. ••-.~_-'•'_::_:.:_ .•. ~_J.,.m_•·.·_:n_._:•••.•.•,L.•_Pm••.a_ •. _ •• tibrie'' .• -.••.•.• _ •. :_;_•... !!·I .: ·=·.·,=: • • : ~ ~~ W. £:! " ::W.;¥ M ::::::::::::::::::::;:;::::::::::::::·:·:-:-·-:-·-·.·.···· 23.26 Ft3/sec 28.28 Ft3/sec 31.75 Ft3/sec 36.26 Ft3/sec 40.99 Ft3/sec 42.79 Ft3/sec 2-Year Storm Event Requires Approximately: 5-Year Storm Event Requires Approximately: 10-Year Storm Event Requires Approximately: 25-Year Storm Event Requires Approximately: 50-Year Storm Event Requires Approximately: 100-Year Storm Event Requires Approximately: 12.33 Ft3/sec 14.99 Ft3/sec 16.83 Ft3/sec 19 .22 Ft3/sec 21 . 73 Ft3/sec 22.69 Ft3/sec 15,213 Cubic Feet 18,499 Cubic Feet 20,763 Cubic Feet 23,714 Cubic Feet 26,807 Cubic Feet 27 ,989 Cubic Feet Time Base (Tb)= 3.00 x T/c And Time Of Concentration (T/c) Of 10 Minutes. DEACON CONDOMINIUMS • PAGE 3 113 113 113 113 113 113 > nt11111·:.1111111111.1111 0•1r11t11ewm::::= .. ·.•_r1_·,,•,,•ra,·_'.·_,._,_·,'a'_'._' .. _''k·.·_,_,._•,•,•,:,•s·.·_._·_.,'t·.·._iA_'_'.·.•·.'_' __ ,._,_·,•.'.''_' ... '_'_'.·_''.',•,•,u,· __ ·,_·,.,·L<_' ..... ,.·_' ... '_''.• .. ·._:a_'_.,_.·' .. ''r··_.·,.',,•,•,·,•a.··_.,_··_,'1·.-~.-.·_' .. _' .. _',~_,._·.·_,. ___ '.•i;;;_·_· .. •.-.'.'a'.·_'.·_'1_' __ ._'.',•.·''':'·':a_' ... '._'.',' ,,,,,,,,,,,,,,,,,,,,::::::::::::::::::::::::::::::: ,,,,,,,,,,,,,,,,,,,,,,,:::::: r¥ iY-J=••• =•=••':w .-a:w:-. JJ!=M.~ :f}~:f}f~:rr~:}~:r=:=:======:=:=:====·===·=·=·=·=· Tributary Area ("A'): 0.73 Acres Pervious Area: 0.32 Acres C= 0.30 Impervious Area: 0.41 Acres c = 0.90 Run-Off Coefficient ("Cwt'): 0.64 Time Of Concentration ("T/cj: 10 Minutes (Min.) Hourly Intensity Rates ("I'): 2-Year: 6.33 Inches I Hour 5-Year: 7.69 Inches I Hour 10-Year: 8.63 Inches I Hour 25-Year: 9.86 Inches I Hour 50-Year: 11.15 Inches I Hour 100-Year: 11 .64 Inches I Hour Peak Discharge Rate f'Q"): 2-Year: 2.94 Cubic Feet I Second 5-Year: 3.58 Cubic Feet I Second 10-Year: 4.02 Cubic Feet I Second 25-Year: 4.59 Cubic Feet I Second 50-Year: 5.18 Cubic Feet I Second 100-Year: 5.41 Cubic Feet I Second DEACON CONDOMINIUMS • PAGE 4 Tributary Area ("A''): 5.03 Acres Pervious Area: 2.19 Acres Impervious Area: 2.84 Acres Run-Off Coefficient ("Cwt''): 0.64 Time Of Concentration ("T/c''): 10 Minutes Hourly Intensity Rates ("I"): 2-Year: 6.33 5-Year: 7.69 10-Year: 8.63 25-Year: 9.86 50-Year: 11.15 100-Year: 11.64 Peak Discharge Rate ("Q"): 2-Year: 20.33 5-Year: 24.72 10-Year: 27.74 25-Year: 31.68 50-Year: 35.82 100-Year: 37.40 c = 0.30 c = 0.90 Inches I Hour Inches I Hour Inches I Hour Inches I Hour Inches I Hour Inches I Hour Cubic Feet I Second Cubic Feet I Second Cubic Feet I Second Cubic Feet I Second Cubic Feet I Second Cubic Feet I Second DEACON CONDOMINIUMS • PAGE 5 ;. Pre-Development Inflow Hydrograph Ordinates (Cubic Feet per Second) Time 2-Year 5-Year 10-Year 25-Year SO-Year 100-Year (Minutes) Storm Storm Storm Storm Storm Storm 0 0.00 0.00 0.00 0.00 0.00 0.00 1 1.09 1.33 1.49 1.70 1.93 2.01 2 2.19 2.66 2.98 3.41 3.85 4.02 3 3.28 3.99 4.48 5.11 5.78 6.03 4 4.37 5.32 5.97 6.81 7.70 8.04 5 5.46 6.64 7.46 8.52 9.63 10.05 6 6.56 7.97 8.95 10.22 11.56 12.06 7 7.65 9.30 10.44 11 .93 13.48 14.08 8 8.74 10.63 11 .93 13.63 15.41 16.09 9 9.84 11 .96 13.43 15.33 17.33 18.1 0 10 10.93 13.29 14.92 17.04 19.26 20.11 <=PEAK 11 10.38 12.63 14.1 7 16.18 18.30 19.10 12 9.84 11 .96 13.43 15.33 17.33 18.10 13 9.29 11.30 12.68 14.48 16.37 17.09 14 8.74 10.63 11.93 13.63 15.41 16.09 15 8.20 9.97 11 .19 12.78 14.44 15.08 16 7.65 9.30 10.44 11.93 13.48 14.08 17 7.10 8.64 9.70 11 .07 12.52 13.07 18 6.56 7.97 8.95 10.22 11 .56 12.06 19 6.01 7.31 8.20 9.37 10.59 11.06 20 5.46 6.64 7.46 8.52 9.63 10.05 21 4.92 5.98 6.71 7.67 8.67 9.05 22 4.37 5.32 5.97 6.81 7.70 8.04 23 3.83 4.65 5.22 5.96 6.74 7.04 24 3.28 3.99 4.48 5.11 5.78 6.03 25 2.73 3.32 3.73 4.26 4.81 5.03 26 2.1 9 2.66 2.98 3.41 3.85 4.02 27 1.64 1.99 2.24 2.56 2.89 3.02 28 1.09 1.33 1.49 1.70 1.93 2.01 29 0.55 0.66 0.75 0.85 0.96 1.01 30 0.00 0.00 0.00 0.00 0.00 0.00 31 0.00 0.00 0.00 0.00 0.00 0.00 32 0.00 0.00 0.00 0.00 0.00 0.00 33 0.00 0.00 0.00 0.00 0.00 0.00 34 0.00 0.00 0.00 0.00 0.00 0.00 35 0.00 0.00 0.00 0.00 0.00 0.00 36 0.00 0.00 0.00 0.00 0.00 0.00 37 0.00 0.00 0.00 0.00 0.00 0.00 38 0.00 0.00 0.00 0.00 0.00 0.00 39 0.00 0.00 0.00 0.00 0.00 0.00 40 0.00 0.00 0.00 0.00 0.00 0.00 41 0.00 0.00 0.00 0.00 0.00 0.00 42 0.00 0.00 0.00 0.00 0.00 0.00 43 0.00 0.00 0.00 0.00 0.00 0.00 44 0.00 0.00 0.00 0.00 0.00 0.00 45 0.00 0.00 0.00 0.00 0.00 0.00 DEACON CONDOMINIUMS -PAGE 6 0 0 000 00 0 0000 000 0 0 000 00 0 0000 000 ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci 0 8 000 0 0 0 oogo 000 0 000 0 0 0 00 0 000 ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ooooooooooog 000 00000000000 000 ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci 00 coo 00 00000 000 00 000 00 00000 000 ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci 0 0 00 0 goooogo 000 0 0 00 0 0000 0 000 ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ogoo 0oooooooooog 0 00 000000000 ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ..... w (.!) < Q. ' en :::E 2 ii: ~ ~ u z 0 u ~ 0 Post-Development Inflow Hydrograph Ordinates (Cubic Feet per Second) Time 2-Year 5-Year 10-Year 25-Year 50-Year 100-Year (Minutes) Storm Storm Storm Storm Storm Storm 0 0.00 0.00 0.00 0.00 0.00 0.00 1 2.33 2.83 3.17 3.63 4.10 4.28 2 4.65 5.66 6.35 7.25 8.20 8.56 3 6.98 8.49 9.52 10.88 12.30 12.84 4 9.30 11.31 12.70 14.50 16.39 17.12 5 11 .63 14.14 15.87 18.13 20.49 21 .40 6 13.96 16.97 19.05 21.75 24.59 25.68 7 16.28 19.80 22.22 25.38 28.69 29.96 8 18.61 22.63 25.40 29.01 32.79 34.24 9 20.93 25.46 28.57 32.63 36.89 38.51 10 23.26 28.28 31 .75 36.26 40.99 42.79 <=PEAK 11 22.10 26.87 30.16 34.45 38.94 40.65 12 20.93 25.46 28.57 32.63 36.89 38.51 13 19.77 24.04 26.98 30.82 34.84 36.38 14 18.61 22.63 25.40 29.01 32.79 34.24 15 17.45 21.21 23.81 27.19 30.74 32.10 16 16.28 19.80 22.22 25.38 28.69 29.96 17 15.12 18.38 20.64 23.57 26.64 27.82 18 13.96 16.97 19.05 21 .75 24.59 25.68 19 12.79 15.56 17.46 19.94 22.54 23.54 20 11.63 14.14 15.87 18.13 20.49 21.40 21 10.47 12.73 14.29 16.32 18.44 19.26 22 9.30 11.31 12.70 14.50 16.39 17.12 23 8.14 9.90 11 .11 12.69 14.35 14.98 24 6.98 8.49 9.52 10.88 12.30 12.84 25 5.82 7.07 7.94 9.06 10.25 10.70 26 4.65 5.66 6.35 7.25 8.20 8.56 27 3.49 4.24 4.76 5.44 6.15 6.42 28 2.33 2.83 3.17 3.63 4.10 4.28 29 1.16 1.41 1.59 1.81 2.05 2.14 30 0.00 0.00 0.00 0.00 0.00 0.00 31 0.00 0.00 0.00 0.00 0.00 0.00 32 0.00 0.00 0.00 0.00 0.00 0.00 33 0.00 0.00 0.00 0.00 0.00 0.00 34 0.00 0.00 0.00 0.00 0.00 0.00 35 0.00 0.00 0.00 0.00 0.00 0.00 36 0.00 0.00 0.00 0.00 0.00 0.00 37 0.00 0.00 0.00 0.00 0.00 0.00 38 0.00 0.00 0.00 0.00 0.00 0.00 39 0.00 0.00 0.00 0.00 0.00 0.00 40 0.00 0.00 0.00 0.00 0.00 0.00 41 0.00 0.00 0.00 0.00 0.00 0.00 42 0.00 0.00 0.00 0.00 0.00 0.00 43 0.00 0.00 0.00 0.00 0.00 0.00 44 0.00 0.00 0.00 0.00 0.00 0.00 45 0.00 0.00 0.00 0.00 0.00 0.00 DEACON CONDOMINIUMS· PAGE 8 .. 000000000000000 000000000000000 c) c) c) c) c) c) c) c) c) c) c) c) c) c) c) 000000000000000 000000000000000 c) c) c) c) c) c) c) c) c) c) c) c) c) c) c) ooooooooooogooo 00000000000 000 c) c) c) c) c) c) c) c) c) c) c) c) c) c) c) oooooooooooogoo 000000000000 00 c) c) c) c) c) c) c) c) c) c) c) c) c) c) c) oooooooogogoooo 00000000 0 0000 c) c) c) c) c) c) c) c) c) c) c) c) c) c) c) ooogooooooooooo 000 00000000000 c) c) c) c) c) c) c) c) c) c) c) c) c) c) c) Post-Development "Free-Flow" Inflow Hydrograph Ordinates (Cubic Feet per Second) Time 2-Year 5-Year 10-Year 25-Year SO-Year 100-Year (Minutes) Storm Storm Storm Storm Storm Storm 0 0.00 0.00 0.00 0.00 0.00 0.00 1 0.29 0.36 0.40 0.46 0.52 0.54 2 0.59 0.72 0.80 0.92 1.04 1.08 3 0.88 1.07 1.20 1.38 1.56 1.62 4 1.18 1.43 1.61 1.83 2.07 2.16 5 1.47 1.79 2.01 2.29 2.59 2.71 6 1.77 2.15 2.41 2.75 3.11 3.25 7 2.06 2.50 2.81 3.21 3.63 3.79 8 2.35 2.86 3.21 3.67 4.15 4.33 9 2.65 3.22 3.61 4.13 4.67 4.87 10 2.94 3.58 4.02 4.59 5.18 5.41 <=PEAK 11 2.79 3.40 3.81 4.36 4.92 5.14 12 2.65 3.22 3.61 4.13 4.67 4.87 13 2.50 3.04 3.41 3.90 4.41 4.60 14 2.35 2.86 3.21 3.67 4.15 4.33 15 2.21 2.68 3.01 3.44 3.89 4.06 16 2.06 2.50 2.81 3.21 3.63 3.79 17 1.91 2.33 2.61 2.98 3.37 3.52 18 1.77 2.15 2.41 2.75 3.11 3.25 19 1.62 1.97 2.21 2.52 2.85 2.98 20 1.47 1.79 2.01 2.29 2.59 2.71 21 1.32 1.61 1.81 2.06 2.33 2.44 22 1.18 1.43 1.61 1.83 2.07 2.16 23 1.03 1.25 1.41 1.60 1.81 1.89 24 0.88 1.07 1.20 1.38 1.56 1.62 25 0.74 0.89 1.00 1.15 1.30 1.35 26 0.59 0.72 0.80 0.92 1.04 1.08 27 0.44 0.54 0.60 0.69 0.78 0.81 28 0.29 0.36 0.40 0.46 0.52 0.54 29 0.15 0.18 0.20 0.23 0.26 0.27 30 0.00 0.00 0.00 0.00 0.00 0.00 31 0.00 0.00 0.00 0.00 0.00 0.00 32 0.00 0.00 0.00 0.00 0.00 0.00 33 0.00 0.00 0.00 0.00 0.00 0.00 34 0.00 0.00 0.00 0.00 0.00 0.00 35 0.00 0.00 0.00 0.00 0.00 0.00 36 0.00 0.00 0.00 0.00 0.00 0.00 37 0.00 0.00 0.00 0.00 0.00 0.00 38 0.00 0.00 0.00 0.00 0.00 0.00 39 0.00 0.00 0.00 0.00 0.00 0.00 40 0.00 0.00 0.00 0.00 0.00 0.00 41 0.00 0.00 0.00 0.00 0.00 0.00 42 0.00 0.00 0.00 0.00 0.00 0.00 43 0.00 0.00 0.00 0.00 0.00 0.00 44 0.00 0.00 0.00 0.00 0.00 0.00 45 0.00 0.00 0.00 0.00 0.00 0.00 DEACON CONDOMINIUMS· PAGE 10 ~ m 000000000000000 00 8· 000000000000 00 000000000000 000000000000000 000000000000000 000000000000000 000000000000000 og· 0000000000000 0 0000000000000 000000000000000 000000000000000 000000000000000 000000000000000 oooooooooog· 0000 0000000000 0000 000000000000000 000000000000000 000000000000000 Post-Development Flow Routed Through Detention Pond Inflow Hydrograph Ordinates (Cubic Feet per Second) Time 2-Year 5-Year 10-Year 25-Year SO-Year 100-Year (Minutes) Storm Storm Storm Storm Storm Storm 0 0.00 0.00 0.00 0.00 0.00 0.00 1 2.03 2.47 2.77 3.17 3.58 3.74 2 4.07 4.94 5.55 6.34 7.16 7.48 3 6.10 7.42 8.32 9.51 10.75 11.22 4 8.13 9.89 11.10 12.67 14.33 14.96 5 10.16 12.36 13.87 15.84 17.91 18.70 6 12.20 14.83 16.65 19.01 21.49 22.44 7 14.23 17.30 19.42 22.18 25.07 26.18 8 16.26 19.77 22.19 25.35 28.65 29.92 9 18.29 22.25 24.97 28.52 32.24 33.66 10 20.33 24.72 27.74 31.68 35.82 37.40 <=PEAK 11 19.31 23.48 26.36 30.10 34.03 35.53 12 18.29 22.25 24.97 28.52 32.24 33.66 13 17.28 21.01 23.58 26.93 30.44 31.79 14 16.26 19.77 22.19 25.35 28.65 29.92 15 15.25 18.54 20.81 23.76 26.86 28.05 16 14.23 17.30 19.42 22.18 25.07 26.18 17 13.21 16.07 18.03 20.60 23.28 24.31 18 12.20 14.83 16.65 19.01 21.49 22.44 19 11.18 13.59 15.26 17.43 19.70 20.57 20 10.16 12.36 13.87 15.84 17.91 18.70 21 9.15 11.12 12.48 14.26 16.12 16.83 22 8.13 9.89 11.10 12.67 14.33 14.96 23 7.11 8.65 9.71 11.09 12.54 13.09 24 6.10 7.42 8.32 9.51 10.75 11.22 25 5.08 6.18 6.94 7.92 8.95 9.35 26 4.07 4.94 5.55 6.34 7.16 7.48 27 3.05 3.71 4.16 4.75 5.37 5.61 28 2.03 2.47 2.77 3.17 3.58 3.74 29 1.02 1.24 1.39 1.58 1.79 1.87 30 0.00 0.00 0.00 0.00 0.00 0.00 31 0.00 0.00 0.00 0.00 0.00 0.00 32 0.00 0.00 0.00 0.00 0.00 0.00 33 0.00 0.00 0.00 0.00 0.00 0.00 34 0.00 0.00 0.00 0.00 0.00 0.00 35 0.00 0.00 0.00 0.00 0.00 0.00 36 0.00 0.00 0.00 0.00 0.00 0.00 37 0.00 0.00 0.00 0.00 0.00 0.00 38 0.00 0.00 0.00 0.00 0.00 0.00 39 0.00 0.00 0.00 0.00 0.00 0.00 40 0.00 0.00 0.00 0.00 0.00 0.00 41 0.00 0.00 0.00 0.00 0.00 0.00 42 0.00 0.00 0.00 0.00 0.00 0.00 43 0.00 0.00 0.00 0.00 0.00 0.00 44 0.00 0.00 0.00 0.00 0.00 0.00 45 0.00 0.00 0.00 0.00 0.00 0.00 DEACON CONDOMINIUMS -PAGE 12 ~ 0 z n 0 z c [if z c ii: (I) ' 000000000000000 000 8· 8· oo ·goooooog· 000 00 000000 000000000000000 000000000000 8· oo 000000000000 00 000000000000000 000000000000000 000000000000000 000000000000000 000000000000000 000000000000000 000000000000000 8. 00000000000000 00000000000000 000000000000000 0000000 8· 0000000 0000000 0000000 Total Pre-Development Vs. Total Post-Development (No Detention) Peak Discharge Rates 2-Year Storm Event ~ ~ 15.00 ----+---~---+----__,f------t-----+-----; Q) ei I'll ~ 10.00 ---J'--~'+-""'~--....---__,f------t-----+-----i i5 0.00 .,._ ___ ..,.. ___ .,._ __ ...,.. ....... __ _,.. ___ ...., ___ -t 0 10 20 30 40 50 Time (Minutes) --Pre-Development Hydrograph -Total Post-Development Hydrograph Total Pre-Development Vs. Total Post-Development (No Detention) Peak Discharge Rates 5-Year Storm Event 60 ~ 20.00 -------.r---+---~-t------l-----+----+--------j -Q) e 15.oo ___ _,__--j----~.r-----f------t-----+-----; I'll .c u s 10.00 ------+-----'--t-----f------+-----+-----1 0.00 -+----+----1----.....;:iii.,__ __ __. ___ ~----1 0 10 20 30 40 50 60 Time (Minutes) --Pre-Development Hydrograph -Post-Development Outflow Hydrograph Without Detention DEACON CONDOMINIUMS -PAGE 14 Total Pre-Development Vs. Total Post-Development (No Detention) Peak Discharge Rates 10-Year Storm Event 0.00 ~---1------1---~----1----1---_..,, 0 10 20 30 40 50 Time (Minutes) --Pre-Development Hydrograph -Post-Development Outflow Hydrograph Without Detention Total Pre-Development Vs. Total Post-Development (No Detention) Peak Discharge Rates 25-Year Storm Event 40.00 35.00 30.00 -i 25.00 Q) ei 20.00 "' .c u en 15.00 i5 10.00 5.00 0.00 0 10 20 30 40 50 Time (Minutes) --Pre-Development Hydrograph -Post-Development Outflow Hydrograph Without Detention DEACON CONDOMINIUMS · PAGE 15 60 60 Total Pre-Development Vs. Total Post-Development (No Detention) Peak Discharge Rates 50-Year Storm Event 45.00 -----.----~-----.-----.------.-----, 40.00 ----------+----~f------t-----t------j 35.00 +----l--+-~--+-----1-------t------i-----j i 30.00 ----#---+-----1------1-----+-----+----i u ;-25.00 ------+--+----t------t-----;------r------j e ~ 20.00 _____ _,___+------'-----1-----t------+-----j u fl) Q 15.00 __ __,_ _ _,__+-____...,~-l----'----1-----+-----+----i 10.00 ---1----+---____...,l--___,l.----!-----+-----+----i 5.00 _,_-+---+----t---..---"lt---1-----;------r------j 0.00 +----+-----------.1----...... ----+----t 0 10 20 30 40 50 60 Time (Minutes) --Pre-Development Hydrograph -Post-Development Outflow Hydrograph Without Detention Total Pre-Development Vs. Total Post-Development (No Detention) Peak Discharge Rates 100-Year Storm Event 45.00 -----~---~---~--~---~---~ 40.00 --------l~---+-----1------1-----+-----l 35.00 -----+--+-~--+-----1------1-----+-----l Ui 30.00 -------ir---t--~-+-----1------t-----t------l 't; ;-25.00 ------+-----.+-----+-----+----+---------< e ~ 20.00 ----------~---f------t-----;-------; u fl) Q 15.00 -----+--+---+----'--+--~--1------1-----+-----l 10.00 --..--+----t---~----f------t-----+-----l 5.00 .,.,_+----+----+-----"--'~1------1----+-----l 0.00 +----+----t---...-.~---------+----1 0 10 20 30 40 50 60 Time (Minutes) --Pre-Development Hydrograph -Post-Development Outflow Hydrograph Without Detention DEACON CONDOMINIUMS -PAGE 16 Elevation 298.96 299.50 300.00 300.50 300.87 301 .37 Contour Area (Ft2) 0 4,868 9,405 17,766 23,725 34,084 i if Depth (Ft.) 0.00 0.54 1.04 1.54 1.91 2.41 Volume (Ft3) 0 876 4,383 11,066 18,715 33,089 Detention Pond Depth Vs. Volume ~ 1.50 4"------+-----1#"---+-----+-----+---+-----i a ~ 0 5,000 10,000 15,000 20,000 25,000 30,000 35,000 Detention Pond Volume (Cubic Feet) DEACON CONDOMINIUMS • PAGE 17 Elevation 298.96 299.50 300.00 300.50 300.87 301.37 Depth (Feet) 0.00 0.54 1.04 1.54 1.91 2.41 PIPE (ADS-N12) (Inches) (Feet) 15.00 1.25 Discharge Ft3/Sec 0.00 1.61 5.34 10.13 12.76 15.44 Rating Curve For Outlet Control Structure Depth Vs. Volume i IU u.. ; 1.50 oP------+-----~!--------1--------< Q. IU c 0.00 +------+------..... ----~i------__, 0.00 5.00 10.00 15.00 20.00 Discharge (Cubic Feet Per Second) DEACON CONDOMINIUMS · PAGE 18 Depth Storage Discharge 2s/t 2s/t+O (Feet) (Ft3) (Ft3/Sec) (Ft3/Sec) (Ft3/Sec) 0.00 0 0.00 0.00 0.00 0.54 876 1.61 29.21 30.82 1.04 4,383 5.34 146.09 151.43 1.54 11,066 10.13 368.86 378.99 1.91 18,715 12.76 623.83 636.59 2.41 33,089 15.44 1,102.98 1,118.42 Storage Indication Curve -Ill 't; 10.00 +----t----1+----+---+-----+--~ - 0.00 +----+---+--_ ...... ___ .,_ __ ....., __ __... 0.00 200.00 400.00 600.00 800.00 1,000.00 1,200.00 2s/t+O (Cubic Feet Per Second) DEACON CONDOMINIUMS -PAGE 19 Inflow I Outflow Simulation 2-Year Storm Event Time Inflow 11+ 12 2s/t-0 2s/t+O Outflow Depth Elevation (Minutes) (Ft3/Sec) (Ft3/Sec) (Feet) 0 0.00 0.00 0.00 0.00 0.00 0.00 298.96 1 2.03 2.03 1.82 2.03 0.1 1 0.04 299.00 2 4.07 6.10 7.09 7.92 0.41 0.14 299.10 3 6.10 10.16 15.45 17.25 0.90 0.30 299.26 4 8.13 14.23 26.58 29.68 1.55 0.52 299.48 5 10.16 18.29 40.78 44.87 2.04 0.60 299.56 6 12.20 22.36 57.92 63.14 2.61 0.67 299.63 7 14.23 26.43 77.82 84.35 3.27 0.76 299.72 8 16.26 30.49 100.30 108.31 4.01 0.86 299.82 9 18.29 34.56 125.20 134.85 4.83 0.97 299.93 10 20.33 38.62 152.62 163.82 5.60 1.07 300.03 11 19.31 39.64 179.86 192.26 6.20 1.13 300.09 12 18.29 37.61 204.00 217.46 6.73 1.19 300.15 13 17.28 35.57 225.18 239.57 7.20 1.23 300.19 14 16.26 33.54 243.53 258.72 7.60 1.28 300.24 15 15.25 31 .51 259.15 275.03 7.94 1.31 300.27 16 14.23 29.47 272.17 288.62 8.23 1.34 300.30 17 13.21 27.44 282.69 299.61 8.46 1.37 300.33 18 12.20 25.41 290.83 308.10 8.64 1.38 300.34 19 11.18 23.38 296.67 314.20 8.77 1.40 300.36 20 10.16 21 .34 300.32 318.01 8.85 1.41 300.37 21 9.15 19.31 301 .87 319.63 8.88 1.41 300.37 22 8.13 17.28 301.41 319.15 8.87 1.41 300.37 23 7.11 15.25 299.02 316.65 8.82 1.40 300.36 24 6.10 13.21 294.78 312.23 8.72 1.39 300.35 25 5.08 11.18 288.77 305.96 8.59 1.38 300.34 26 4.07 9.15 281 .07 297.92 8.42 1.36 300.32 27 3.05 7.11 271 .75 288.19 8.22 1.34 300.30 28 2.03 5.08 260.87 276.83 7.98 1.32 300.28 29 1.02 3.05 248.51 263.92 7.71 1.29 300.25 30 0.00 1.02 234.71 249.52 7.40 1.26 300.22 31 0.00 0.00 220.53 234.71 7.09 1.22 300.18 32 0.00 0.00 206.94 220.53 6.79 1.19 300.15 33 0.00 0.00 193.92 206.94 6.51 1.16 300.12 34 0.00 0.00 181 .45 193.92 6.23 1.13 300.09 35 0.00 0.00 169.51 181.45 5.97 1.11 300.07 36 0.00 0.00 158.07 169.51 5.72 1.08 300.04 37 0.00 0.00 147.11 158.07 5.48 1.05 300.01 38 0.00 0.00 136.70 147.11 5.21 1.02 299.98 39 0.00 0.00 126.93 136.70 4.88 0.98 299.94 40 0.00 0.00 117.76 126.93 4.58 0.94 299.90 41 0.00 0.00 109.17 117.76 4.30 0.90 299.86 42 0.00 0.00 101 .10 109.17 4.03 0.86 299.82 43 0.00 0.00 93.53 101.10 3.78 0.83 299.79 44 0.00 0.00 86.43 93.53 3.55 0.80 299.76 45 0.00 0.00 79.77 86.43 3.33 0.77 299.73 DEACON CONDOMINIUMS -PAGE 20 46 0.00 0.00 73.53 79.77 3.12 0.74 299.70 47 0.00 0.00 67.66 73.53 2.93 0.72 299.68 48 0.00 0.00 62.17 67.66 2.75 0.69 299.65 49 0.00 0.00 57.01 62.17 2.58 0.67 299.63 50 0.00 0.00 52.17 57.01 2.42 0.65 299.61 51 0.00 0.00 47.63 52.17 2.27 0.63 299.59 52 0.00 0.00 43.37 47.63 2.13 0.61 299.57 53 0.00 0.00 39.37 43.37 2.00 0.59 299.55 54 0.00 0.00 35.62 39.37 1.87 0.58 299.54 55 0.00 0.00 32.10 35.62 1.76 0.56 299.52 56 0.00 0.00 28.81 32.10 1.65 0.55 299.51 57 0.00 0.00 25.80 28.81 1.50 0.50 299.46 58 0.00 0.00 23.10 25.80 1.35 0.45 299.41 59 0.00 0.00 20.69 23.10 1.21 0.40 299.36 60 0.00 0.00 18.53 20.69 1.08 0.36 299.32 DEACON CONDOMINIUMS· PAGE 21 ~ u -G> El cu .c u (I) i5 Inflow/Outflow Simulation 2-Year Storm Event 25.00 ----~---~-----.---------.-----.------, 20.00 15.00 10.00 0 I I ' ' I ' I I I I ' I I ' ' I ' I ' I ' I I I I ' 10 20 30 40 Time (Minutes) ---Pre-Development Hydrograph Post-Development Outflow Hydrograph Without Detention ---Post-Development Outflow With Detention - - -• Post-Development "Free-Flow'' DEACON CONDOMINIUMS • PAGE 22 50 60 Inflow I Outflow Simulation 5-Year Storm Event Time Inflow 11+ 12 2s/t-0 2s/t+O Outflow Depth Elevation (Minutes) (Ft3/Sec) (Ft3/Sec) (Feet) 0 0.00 0.00 0.00 0.00 0.00 0.00 298.96 1 2.47 2.47 2.21 2.47 0.13 0.04 299.00 2 4.94 7.42 8.62 9.63 0.50 0.17 299.13 3 7.42 12.36 18.79 20.98 1.10 0.37 299.33 4 9.89 17.30 32.54 36.09 1.77 0.56 299.52 5 12.36 22.25 50.09 54.79 2.35 0.64 299.60 6 14.83 27.19 71 .18 77.28 3.05 0.73 299.69 7 17.30 32.13 95.61 103.31 3.85 0.84 299.80 8 19.77 37.08 123.17 132.69 4.76 0.96 299.92 9 22.25 42.02 153.93 165.18 5.63 1.07 300.03 10 24.72 46.96 188.13 200.89 6.38 1.15 300.11 11 23.48 48.20 222.07 236.32 7.13 1.23 300.19 12 22.25 45.73 252.22 267.80 7.79 1.30 300.26 13 21.01 43.25 278.73 295.47 8.37 1.36 300.32 14 19.77 40.78 301 .75 319.51 8.88 1.41 300.37 15 18.54 38.31 321 .44 340.07 9.31 1.45 300.41 16 17.30 35.84 337.94 357.28 9.67 1.49 300.45 17 16.07 33.37 351 .37 371.31 9.97 1.52 300.48 18 14.83 30.90 361 .94 382.26 10.16 1.54 300.50 19 13.59 28.42 369.87 390.36 10.25 1.56 300.52 20 12.36 25.95 375.22 395.82 10.30 1.56 300.52 21 11 .12 23.48 378.04 398.70 10.33 1.57 300.53 22 9.89 21 .01 378.38 399.05 10.33 1.57 300.53 23 8.65 18.54 376.29 396.92 10.31 1.57 300.53 24 7.42 16.07 371 .82 392.35 10.27 1.56 300.52 25 6.18 13.59 365.03 385.42 10.20 1.55 300.51 26 4.94 11.12 356.01 376.15 10.07 1.53 300.49 27 3.71 8.65 345.00 364.66 9.83 1.51 300.47 28 2.47 6.18 332.09 351 .18 9.54 1.48 300.44 29 1.24 3.71 317.36 335.80 9.22 1.45 300.41 30 0.00 1.24 300.88 318.59 8.86 1.41 300.37 31 0.00 0.00 283.90 300.88 8.49 1.37 300.33 32 0.00 0.00 267.65 283.90 8.13 1.33 300.29 33 0.00 0.00 252.07 267.65 7.79 1.30 300.26 34 0.00 0.00 237.16 252.07 7.46 1.26 300.22 35 0.00 0.00 222.87 237.16 7.14 1.23 300.19 36 0.00 0.00 209.18 222.87 6.84 1.20 300.16 37 0.00 0.00 196.07 209.18 6.56 1.17 300.13 38 0.00 0.00 183.51 196.07 6.28 1.14 300.10 39 0.00 0.00 171.48 183.51 6.02 1.11 300.07 40 0.00 0.00 159.96 171.48 5.76 1.08 300.04 41 0.00 0.00 148.92 159.96 5.52 1.06 300.02 42 0.00 0.00 138.39 148.92 5.26 1.03 299.99 43 0.00 0.00 128.52 138.39 4.94 0.99 299.95 44 0.00 0.00 119.26 128.52 4.63 0.95 299.91 45 0.00 0.00 110.57 119.26 4.34 0.91 299.87 DEACON CONDOMINIUMS -PAGE 23 46 0.00 0.00 102.41 110.57 4.08 0.87 299.83 47 0.00 0.00 94.77 102.41 3.82 0.84 299.80 48 0.00 0.00 87.59 94.77 3.59 0.81 299.77 49 0.00 0.00 80.86 87.59 3.37 0.78 299.74 50 0.00 0.00 74.54 80.86 3.16 0.75 299.71 51 0.00 0.00 68.62 74.54 2.96 0.72 299.68 52 0.00 0.00 63.06 68.62 2.78 0.70 299.66 53 0.00 0.00 57.85 63.06 2.61 0.67 299.63 54 0.00 0.00 52.96 57.85 2.45 0.65 299.61 55 0.00 0.00 48.37 52.96 2.29 0.63 299.59 56 0.00 0.00 44.06 48.37 2.15 0.61 299.57 57 0.00 0.00 40.02 44.06 2.02 0.59 299.55 58 0.00 0.00 36.23 40.02 1.89 0.58 299.54 59 0.00 0.00 32.68 36.23 1.78 0.56 299.52 60 0.00 0.00 29.34 32.68 1.67 0.55 299.51 DEACON CONDOMINIUMS -PAGE 24 -ti -a> El tU s= u en Ci Inflow/Outflow Simulation 5-Year Storm Event 30.00 -----~--~---~----r----.-----, 25.00 20.00 15.00 0 I \ I ' I ' ' I ' ' ' ' ' ' 10 20 30 40 Time (Minutes) ---Pre-Development Hydrograph Post-Development Outflow Hydrograph Without Detention ---Post-Development Outflow With Detention -- - - - -Post-Development "Free-Flaw" DEACON CONDOMINIUMS -PAGE 25 50 60 Inflow I Outflow Simulation 10-Year Storm Event Time Inflow 11+ 12 2s/t-0 2s/t+O Outflow Depth Elevation (Minutes) (Ft3/Sec) (Ft3/Sec) (Feet) 0 0.00 0.00 0.00 0.00 0.00 0.00 298.96 1 2.77 2.77 2.48 2.77 0.14 0.05 299.01 2 5.55 8.32 9.68 10.81 0.56 0.19 299.15 3 8.32 13.87 21.09 23.55 1.23 0.41 299.37 4 11.10 19.42 36.69 40.51 1.91 0.58 299.54 5 13.87 24.97 56.53 61.66 2.56 0.67 299.63 6 16.65 30.52 80.35 87.05 3.35 0.77 299.73 7 19.42 36.07 107.90 116.42 4.26 0.89 299.85 8 22.19 41.61 138.95 149.51 5.28 1.03 299.99 9 24.97 47.16 173.98 186.12 6.07 1.12 300.08 10 27.74 52.71 212.84 226.69 6.92 1.21 300.17 11 26.36 54.10 251.39 266.94 7.77 1.29 300.25 12 24.97 51.32 285.67 302.72 8.52 1.37 300.33 13 23.58 48.55 315.84 334.22 9.19 1.44 300.40 14 22.19 45.78 342.09 361.62 9.76 1.50 300.46 15 20.81 43.00 364.71 385.09 10.19 1.55 300.51 16 19.42 40.23 384.14 404.93 10.39 1.58 300.54 17 18.03 37.45 400.47 421.60 10.57 1.60 300.56 18 16.65 34.68 413.74 435.14 10.70 1.62 300.58 19 15.26 31.90 424.02 445.64 10.81 1.64 300.60 20 13.87 29.13 431.38 453.15 10.89 1.65 300.61 21 12.48 26.36 435.86 457.73 10.93 1.65 300.61 22 11.10 23.58 437.54 459.45 10.95 1.66 300.62 23 9.71 20.81 436.47 458.35 10.94 1.65 300.61 24 8.32 18.03 432.70 454.50 10.90 1.65 300.61 25 6.94 15.26 426.29 447.96 10.83 1.64 300.60 26 5.55 12.48 417.29 438.77 10.74 1.63 300.59 27 4.16 9.71 405.76 427.00 10.62 1.61 300.57 28 2.77 6.94 391.75 412.70 10.47 1.59 300.55 29 1.39 4.16 375.31 395.91 10.30 1.56 300.52 30 0.00 1.39 356.53 376.69 10.08 1.53 300.49 31 0.00 0.00 337.22 356.53 9.66 1.49 300.45 32 0.00 0.00 318.71 337.22 9.25 1.45 300.41 33 0.00 0.00 300.99 318.71 8.86 1.41 300.37 34 0.00 0.00 284.02 300.99 8.49 1.37 300.33 35 0.00 0.00 267.75 284.02 8.13 1.33 300.29 36 0.00 0.00 252.18 267.75 7.79 1.30 300.26 37 0.00 0.00 237.25 252.18 7.46 1.26 300.22 38 0.00 0.00 222.96 237.25 7.15 1.23 300.19 39 0.00 0.00 209.27 222.96 6.85 1.20 300.16 40 0.00 0.00 196.16 209.27 6.56 1.17 300.13 41 0.00 0.00 183.59 196.16 6.28 1.14 300.10 42 0.00 0.00 171.56 183.59 6.02 1.11 300.07 43 0.00 0.00 160.03 171.56 5.76 1.08 300.04 44 0.00 0.00 148.99 160.03 5.52 1.06 300.02 45 0.00 0.00 138.46 148.99 5.26 1.03 299.99 DEACON CONOOMINMJMS -PAGE 26 46 0.00 0.00 128.58 138.46 4.94 0.99 299.95 47 0.00 0.00 119.32 128.58 4.63 0.95 299.91 48 0.00 0.00 110.62 119.32 4.35 0.91 299.87 49 0.00 0.00 102.47 110.62 4.08 0.87 299.83 50 0.00 0.00 94.82 102.47 3.83 0.84 299.80 51 0.00 0.00 87.64 94.82 3.59 0.81 299.77 52 0.00 0.00 80.90 87.64 3.37 0.78 299.74 53 0.00 0.00 74.59 80.90 3.16 0.75 299.71 54 0.00 0.00 68.66 74.59 2.96 0.72 299.68 55 0.00 0.00 63.10 68.66 2.78 0.70 299.66 56 0.00 0.00 57.88 63.10 2.61 0.67 299.63 57 0.00 0.00 52.99 57.88 2.45 0.65 299.61 58 0.00 0.00 48.40 52.99 2.30 0.63 299.59 59 0.00 0.00 44.09 48.40 2.15 0.61 299.57 60 0.00 0.00 40.05 44.09 2.02 0.60 299.56 DEACON CONDOMINIUMS -PAGE 27 -~ u -Cl) ei tU s: u U) i3 Inflow/Outflow Simulation 10-Year Storm Event 35.00 ------~--~---~---.....-----.,.--------, 30.00 25.00 20.00 15.00 0 ' ' ' ' ' ' ' ' ' ' ' ' I 10 20 30 40 Time (Minutes) ---Pre-Development Hydrograph Post-Development Outflow Hydrograph Without Detention ---Post-Development Outflow With Detention - - - - - -Post-Development "Free-Flow" DEACON CONDOMINIUMS· PAGE 28 50 60 Inflow I Outflow Simulation 25-Year Storm Event Time Inflow 11+ 12 2s/t-0 2s/t+O Outflow Depth Elevation (Minutes) (Ft3/Sec) (Ft3/Sec) (Feet) 0 0.00 0.00 0.00 0.00 0.00 0.00 298.96 1 3.17 3.17 2.84 3.17 0.17 0.06 299.02 2 6.34 9.51 11 .05 12.34 0.64 0.22 299.18 3 9.51 15.84 24.09 26.90 1.41 0.47 299.43 4 12.67 22.18 42.09 46.27 2.09 0.60 299.56 5 15.84 28.52 64.93 70.61 2.84 0.70 299.66 6 19.01 34.85 92.29 99.78 3.74 0.63 299.79 7 22.18 41 .19 123.91 133.48 4.78 0.97 299.93 8 25.35 47.53 159.92 171.44 5.76 1.08 300.04 9 28.52 53.86 200.48 213.78 6.65 1.18 300.14 10 31 .68 60.20 245.40 260.68 7.64 1.28 300.24 11 30.10 61.79 289.95 307.19 8.62 1.38 300.34 12 28.52 58.62 329.59 348.57 9.49 1.47 300.43 13 26.93 55.45 364.65 385.04 10.19 1.55 300.51 14 25.35 52.28 395.90 416.93 10.52 1.59 300.55 15 23.76 49.11 423.40 445.01 10.80 1.63 300.59 16 22.18 45.94 447.24 469.34 11.05 1.67 300.63 17 20.60 42.77 467.49 490.01 11.26 1.70 300.66 18 19.01 39.61 484.22 507.09 11.44 1.72 300.68 19 17.43 36.44 497.50 520.66 11.58 1.74 300.70 20 15.84 33.27 507.41 530.77 11.68 1.76 300.72 21 14.26 30.10 514.02 537.51 11.75 1.77 300.73 22 12.67 26.93 517.38 540.95 11 .78 1.77 300.73 23 11.09 23.76 517.57 541.15 11.79 1.77 300.73 24 9.51 20.60 514.66 538.17 11.76 1.77 300.73 25 7.92 17.43 508.70 532.09 11.69 1.76 300.72 26 6.34 14.26 499.76 522.96 11.60 1.75 300.71 27 4.75 11.09 487.90 510.85 11 .48 1.73 300.69 28 3.17 7.92 473.17 495.82 11 .32 1.71 300.67 29 1.58 4.75 455.64 477.92 11.14 1.68 300.64 30 0.00 1.58 435.37 457.23 10.93 1.65 300.61 31 0.00 0.00 413.96 435.37 10.71 1.62 300.58 32 0.00 0.00 392.99 413.96 10.49 1.59 300.55 33 0.00 0.00 372.44 392.99 10.27 1.56 300.52 34 0.00 0.00 352.45 372.44 9.99 1.53 300.49 35 0.00 0.00 333.31 352.45 9.57 1.48 300.44 36 0.00 0.00 314.97 333.31 9.17 1.44 300.40 37 0.00 0.00 297.41 314.97 8.78 1.40 300.36 38 0.00 0.00 280.58 297.41 8.41 1.36 300.32 39 0.00 0.00 264.47 280.58 8.06 1.32 300.28 40 0.00 0.00 249.03 264.47 7.72 1.29 300.25 41 0.00 0.00 234.24 249.03 7.39 1.25 300.21 42 0.00 0.00 220.07 234.24 7.08 1.22 300.18 43 0.00 0.00 206.50 220.07 6.78 1.19 300.15 44 0.00 0.00 193.50 206.50 6.50 1.16 300.12 45 0.00 0.00 181.05 193.50 6.23 1.13 300.09 DEACON CONDOMINIUMS -PAGE 29 46 0.00 0.00 169.13 181.05 5.96 1.11 300.07 47 0.00 0.00 157.70 169.13 5.71 1.08 300.04 48 0.00 0.00 146.76 157.70 5.47 1.05 300.01 49 0.00 0.00 136.37 146.76 5.20 1.02 299.98 50 0.00 0.00 126.62 136.37 4.87 0.98 299.94 51 0.00 0.00 117.47 126.62 4.57 0.94 299.90 52 0.00 0.00 108.89 117.47 4.29 0.90 299.86 53 0.00 0.00 100.85 108.89 4.02 0.86 299.82 54 0.00 0.00 93.29 100.85 3.78 0.83 299.79 55 0.00 0.00 86.21 93.29 3.54 0.80 299.76 56 0.00 0.00 79.56 86.21 3.32 0.77 299.73 57 0.00 0.00 73.33 79.56 3.12 0.74 299.70 58 0.00 0.00 67.48 73.33 2.92 0.72 299.68 59 0.00 0.00 61.99 67.48 2.74 0.69 299.65 60 0.00 0.00 56.84 61.99 2.57 0.67 299.63 DEACON CONDOMINIUMS -PAGE 30 Inflow/Outflow Simulation 25-Year Storm Event 40.00 ------r-----.------,.-------r----.,.------, 35.00 \ 30.00 \ I \ I \ \ 25.00 \ \ i \ u I \ -I ~ ~ 20.00 \ .c u en Q 15.00 0 10 20 30 40 Time (Minutes) ---Pre-Development Hydrograph Post-Development Outflow Hydrograph Without Detention --•Post-Development Outflow With Detention ------Post-Development "Free-Flow" DEACON CONDOMINIUMS • PAGE 31 50 60 Inflow I Outflow Simulation 50-Year Storm Event Time Inflow 11+ 12 2s/t-O 2s/t+O Outflow Depth Elevation (Minutes) (Ft3/Sec) (Ft3/Sec) (Feet) 0 0.00 0.00 0.00 0.00 0.00 0.00 298.96 1 3.58 3.58 3.21 3.58 0.19 0.06 299.02 2 7.16 10.75 12.49 13.95 0.73 0.24 299.20 3 10.75 17.91 27.23 30.40 1.59 0.53 299.49 4 14.33 25.07 47.75 52.30 2.27 0.63 299.59 5 17.91 32.24 73.73 79.99 3.13 0.74 299.70 6 21.49 39.40 104.81 113.12 4.16 0.88 299.84 7 25.07 46.56 140.70 151.38 5.34 1.04 300.00 8 28.65 53.73 181 .94 194.43 6.24 1.13 300.09 9 32.24 60.89 228.30 242.83 7.26 1.24 300.20 10 35.82 68.05 279.57 296.35 8.39 1.36 300.32 11 34.03 69.84 330.40 349.41 9.51 1.48 300.44 12 32.24 66.26 376.04 396.66 10.31 1.57 300.53 13 30.44 62.68 417.24 438.72 10.74 1.63 300.59 14 28.65 59.10 454.09 476.34 11.12 1.68 300.64 15 26.86 55.52 486.68 509.61 11.46 1.73 300.69 16 25.07 51.94 515.10 538.62 11.76 1.77 300.73 17 23.28 48.35 539.42 563.45 12.01 1.80 300.76 18 21.49 44.77 559.75 584.20 12.23 1.83 300.79 19 19.70 41 .19 576.14 600.94 12.40 1.86 300.82 20 17.91 37.61 588.70 613.75 12.53 1.88 300.84 21 16.12 34.03 597.49 622.72 12.62 1.89 300.85 22 14.33 30.44 602.59 627.93 12.67 1.90 300.86 23 12.54 26.86 604.08 629.45 12.69 1.90 300.86 24 10.75 23.28 602.03 627.36 12.67 1.90 300.86 25 8.95 19.70 596.51 621 .73 12.61 1.89 300.85 26 7.16 16.12 587.60 612.63 12.52 1.88 300.84 27 5.37 12.54 575.36 600.13 12.39 1.86 300.82 28 3.58 8.95 559.86 584.31 12.23 1.83 300.79 29 1.79 5.37 541 .17 565.23 12.03 1.81 300.77 30 0.00 1.79 519.35 542.96 11.80 1.78 300.74 31 0.00 0.00 496.23 519.35 11.56 1.74 300.70 32 0.00 0.00 473.57 496.23 11.33 1.71 300.67 33 0.00 0.00 451 .38 473.57 11.10 1.68 300.64 34 0.00 0.00 429.64 451.38 10.87 1.64 300.60 35 0.00 0.00 408.35 429.64 10.65 1.61 300.57 36 0.00 0.00 387.49 408.35 10.43 1.58 300.54 37 0.00 0.00 367.06 387.49 10.22 1.55 300.51 38 0.00 0.00 347.30 367.06 9.88 1.51 300.47 39 0.00 0.00 328.37 347.30 9.46 1.47 300.43 40 0.00 0.00 310.24 328.37 9.06 1.43 300.39 41 0.00 0.00 292.88 310.24 8.68 1.39 300.35 42 0.00 0.00 276.24 292.88 8.32 1.35 300.31 43 0.00 0.00 260.31 276.24 7.97 1.31 300.27 44 0.00 0.00 245.04 260.31 7.63 1.28 300.24 45 0.00 0.00 230.42 245.04 7.31 1.25 300.21 DEACON CONDOMINIUMS -PAGE 32 46 0.00 0.00 216.42 230.42 7.00 1.21 300.17 47 0.00 0.00 203.00 216.42 6.71 1.18 300.14 48 0.00 0.00 190.15 203.00 6.43 1.15 300.11 49 0.00 0.00 177.84 190.15 6.16 1.13 300.09 50 0.00 0.00 166.05 177.84 5.90 1.10 300.06 51 0.00 0.00 154.75 166.05 5.65 1.07 300.03 52 0.00 0.00 143.93 154.75 5.41 1.05 300.01 53 0.00 0.00 133.72 143.93 5.11 1.01 299.97 54 0.00 0.00 124.13 133.72 4.79 0.97 299.93 55 0.00 0.00 115.14 124.13 4.50 0.93 299.89 56 0.00 0.00 106.71 115.14 4.22 0.89 299.85 57 0.00 0.00 98.79 106.71 3.96 0.85 299.81 58 0.00 0.00 91.37 98.79 3.71 0.82 299.78 59 0.00 0.00 84.40 91.37 3.48 0.79 299.75 60 0.00 0.00 77.87 84.40 3.27 0.76 299.72 DEACON CONDOMINRJMS -PAGE 33 -~ u -Q) ei ca .c u Ill 0 Inflow/Outflow Simulation 50-Year Storm Event 45.00 ~-------~------~---~---~ 40.00 35.00 30.00 25.00 20.00 0 I I \ ' ' ' ' ' ' \ 10 20 30 40 Time (Minutes) ---Pre-Development Hydrograph Post-Development Outflow Hydrograph Without Detention ---Post-Development Outflow With Detention ------Post-Development "Free-Flow" DEACON CONDOMINIUMS· PAGE 34 50 60 Inflow I Outflow Simulation 100-Year Storm Event Time Inflow 11+ 12 2s/t-0 2s/t+O Outflow Depth Elevation (Minutes) (Ft3/Sec) (Ft3/Sec) (Feet) 0 0.00 0.00 0.00 0.00 0.00 0.00 298.96 1 3.74 3.74 3.35 3.74 0.20 0.07 299.03 2 7.48 11.22 13.05 14.57 0.76 0.26 299.22 3 11.22 18.70 28.47 31.74 1.64 0.54 299.50 4 14.96 26.18 49.95 54.64 2.35 0.64 299.60 5 18.70 33.66 77.12 83.61 3.24 0.76 299.72 6 22.44 41.14 109.63 118.26 4.31 0.90 299.86 7 26.18 48.62 147.28 158.25 5.48 1.05 300.01 8 29.92 56.10 190.51 203.37 6.43 1.15 300.11 9 33.66 63.57 239.08 254.08 7.50 1.27 300.23 10 37.40 71.05 292.77 310.13 8.68 1.39 300.35 11 35.53 72.92 346.00 365.70 9.85 1.51 300.47 12 33.66 69.18 394.18 415.18 10.50 1.59 300.55 13 31.79 65.44 437.72 459.63 10.95 1.66 300.62 14 29.92 61.70 476.70 499.42 11.36 1.71 300.67 15 28.05 57.96 511.23 534.67 11.72 1.76 300.72 16 26.18 54.23 541.39 565.46 12.03 1.81 300.77 17 24.31 50.49 567.27 591.87 12.30 1.85 300.81 18 22.44 46.75 588.95 614.01 12.53 1.88 300.84 19 20.57 43.01 606.53 631.96 12.71 1.90 300.86 20 18.70 39.27 620.18 645.80 12.81 1.92 300.88 21 16.83 35.53 629.97 655.71 12.87 1.93 300.89 22 14.96 31.79 635.96 661.76 12.90 1.94 300.90 23 13.09 28.05 638.18 664.01 12.91 1.94 300.90 24 11.22 24.31 636.68 662.49 12.90 1.94 300.90 25 9.35 20.57 631.50 657.25 12.87 1.93 300.89 26 7.48 16.83 622.68 648.33 12.83 1.92 300.88 27 5.61 13.09 610.26 635.77 12.75 1.91 300.87 28 3.74 9.35 594.44 619.61 12.59 1.89 300.85 29 1.87 5.61 575.28 600.05 12.39 1.86 300.82 30 0.00 1.87 552.84 577.15 12.15 1.82 300.78 31 0.00 0.00 529.03 552.84 11.90 1.79 300.75 32 0.00 0.00 505.71 529.03 11.66 1.76 300.72 33 0.00 0.00 482.86 505.71 11.42 1.72 300.68 34 0.00 0.00 460.48 482.86 11.19 1.69 300.65 35 0.00 0.00 438.55 460.48 10.96 1.66 300.62 36 0.00 0.00 417.08 438.55 10.74 1.63 300.59 37 0.00 0.00 396.04 417.08 10.52 1.59 300.55 38 0.00 0.00 375.43 396.04 10.30 1.56 300.52 39 0.00 0.00 355.32 375.43 10.06 1.53 300.49 40 0.00 0.00 336.06 355.32 9.63 1.49 300.45 41 0.00 0.00 317.60 336.06 9.23 1.45 300.41 42 0.00 0.00 299.93 317.60 8.84 1.41 300.37 43 0.00 0.00 283.00 299.93 8.47 1.37 300.33 44 0.00 0.00 266.78 283.00 8.11 1.33 300.29 45 0.00 0.00 251.24 266.78 7.77 1.29 300.25 DEACON CONDOMINIUMS -PAGE 35 46 0.00 0.00 236.36 251.24 7.44 1.26 300.22 47 0.00 0.00 222.10 236.36 7.13 1.23 300.19 48 0.00 0.00 208.45 222.10 6.83 1.20 300.16 49 0.00 0.00 195.37 208.45 6.54 1.17 300.13 50 0.00 0.00 182.84 195.37 6.26 1.14 300.10 51 0.00 0.00 170.84 182.84 6.00 1.11 300.07 52 0.00 0.00 159.34 170.84 5.75 1.08 300.04 53 0.00 0.00 148.33 159.34 5.51 1.06 300.02 54 0.00 0.00 137.84 148.33 5.24 1.03 299.99 55 0.00 0.00 128.00 137.84 4.92 0.98 299.94 56 0.00 0.00 118.77 128.00 4.62 0.94 299.90 57 0.00 0.00 110.11 118.77 4.33 0.90 299.86 58 0.00 0.00 101.99 110.11 4.06 0.87 299.83 59 0.00 0.00 94.36 101.99 3.81 0.84 299.80 60 0.00 0.00 87.21 94.36 3.58 0.80 299.76 DEACON CONDOMINIUMS -PAGE 36 Inflow/Outflow Simulation 100-Year Storm Event 45.00 -----~--------------~---~ 40.00 I \ I I ' ' 35.00 I • ' ' I 30.00 ' -• J!! 25.00 ' u -Q) e ca .c u Cl) 20.00 c 0 ' • 10 20 30 40 Time (Minutes) ---Pre-Development Hydrograph Post-Development Outflow Hydrograph Without Detention --•Post-Development Outflow With Detention - - - - - -Post-Development "Free-Flow'' DEACON CONDOMINIUMS -PAGE 37 50 60 Inflow/Outflow Simulation 2-Year Storm Event ~ -Q) e> 6.00 ----r----+-----+-+------t---.------11-----+-----j ca .c u en i5 0.00 .,._ ___ ._ ___ ..... __ --ti.----..... ---..... ----1 0 10 20 30 40 50 60 Time (Minutes) --Pre-Development Hydrograph -Total Post-Development Hydrograph DEACON CONDOMINIUMS -PAGE 38 Inflow/Outflow Simulation 5-Year Storm Event -8.00 ~ u -4> e al .c u en i5 6.00 0 10 20 30 40 50 60 Time (Minutes) --Pre-Development Hydrograph -Total Post-Development Hydrograph DEACON CONDOMINIUMS • PAGE 39 Inflow/Outflow Simulation 10-Year Storm Event 10.00 i ~ I» E' 8.00 "' .I:! u U) c 6.00 0 10 20 30 40 50 60 Time (Minutes) --Pre-Development Hydrograph -Total Post-Development Hydrograph DEACON CONDOMINIUMS -PAGE 40 Inflow/Outflow Simulation 25-Year Storm Event ~ 10.00 +---+__._--+----+-1-----+-____,.~--+-----+-------l u -Q) ei cu &. u UI c 8.00 +--+-JJ--+----H---~~--~-----f--------1 0 10 20 30 40 50 60 Time (Minutes) --Pre-Development Hydrograph -Total Post-Development Hydrograph DEACON CONDOMINIUMS -PAGE 41 Inflow/Outflow Simulation 50-Year Storm Event 15.00 C--/ -J!! u -G) e> tU ~ u Cl) c 10.00 0 10 20 30 40 50 60 Time (Minutes) --Pre-Development Hydrograph -Total Post-Development Hydrograph DEACON CONDOMINIUMS -PAGE 42 Inflow/Outflow Simulation 100-Year Storm Event 15.00 i u -Cl) e> ca s::. u en Q 10.00 0 10 20 30 40 50 60 Time (Minutes) --Pre-Development Hydrograph -Total Post-Development Hydrograph DEACON CONDOMINIUMS • PAGE 43 Detention Pond Storage Volumes as Percent of Maximum Volume Percent Of lHmHlHllllll Detention Pond 50% -1--------------------t Capacity 30% -1--------1 20% 10% 2-year 5-year 10-year 25-year 50-year 100-year Stonn Depth Stonn Elevation Stonn Volume Maximum Capacity Percent of Capacity 28% Design Stonn 35% 41% 48% 56% DEACON CONDOMINIUMS -PAGE 44 100-ear 1.94 300.90 19533 33089 59% Appendix Solve For: Discharge Culvert Summary Allowable HW Elevation Cu,vert Calculator Report NORTHWEST DETENTION POND -15" ADS-N12 301.37 ft Headwater Depth/ Height 1.93 Computed Headwater Elevation 301 .37 ft Discharge 15.44 cfs Inlet Control HW Elev 301 .37 ft TailYlater Elevation 298.86 ft Outlet Control HW Elev 301 .23 ft Control Type Inlet Control Grades Upstream Invert 298.96 ft Downstream Invert 298.86 ft Length 21 .71 ft Constructed Slope 0.004606 ft/ft Hydraulic Profile Profile CompositeM2Pressure Depth, Downstream 1.10 ft Slope Type Mild Normal Depth NIA ft Flow Regime Subcritical Critical Depth 1.10 ft Velocity Downstream 6.75 ft/s Critical Slope 0.010942 ft/ft Section Section Shape Circular Mannings Coefficient 0.012 Section Material PVC Span 1.25 ft Section Size 15 inch Rise 1.25 ft Number Sections 2 Outlet Control Properties Outlet Control HW Elev 301 .23 ft Upstream Velocity Head 0.62 ft Ke 0.50 Entrance Loss 0.31 ft Inlet Control Properties Inlet Control HW Elev 301 .37 ft Flow Control Submerged Inlet Type Square edge w/headwall Area Full 2.5 ft2 K 0.00980 HOS 5Chart M 2.00000 HOS 5 Scale c 0.03980 Equation Form y 0.67000 c:\haestad\cvm\cathey c.cvm HESTER ENGINEERING COMPANY Project Engineer: Hester Engineering Company CulvertMaster v1 .o 11/08101 08:07:01 AM © Haestad Methods, Inc. 37 Brookside Road Wsterbury, CT 06708 USA (203) 755-1666 Page 1of1 Range Data: Allowable HW Elev< Minimum 298.96 HW Elev (ft) Discharge (cfs) 298.96 0.00 298.97 0.00 298.98 0.00 298.99 0.00 299.00 0.00 299.01 0.01 299.02 0.01 299.03 0.01 299.04 0.01 299.05 0.01 299.06 0.01 299.07 0.07 299.08 0.01 299.09 0.10 299.10 0.01 299.11 0.01 299.12 0.01 299.13 0.18 299.14 0.01 299.15 0.22 299.16 0.24 299.17 0.26 299.18 0.29 299.19 0.31 299.20 0.34 299.21 0.37 299.22 0.40 299.23 0.43 299.24 0.46 299.25 0.49 299.26 0.52 299.27 0.56 299.28 0.59 299.29 0.63 299.30 0.67 299.31 0.70 299.32 0.74 299.33 0.78 299.34 0.82 299.35 0.87 299.36 0.91 299.37 0.95 299.38 1.00 299.39 1.04 299.40 1.09 299.41 1.14 299.42 1.19 Rating Table Report NORTHWEST DETENTION POND -15" ADS-N12 Maximum 301 .37 Increment 0.01 ft Project Engineer: Hester Engineering Company c:\haestadlcvm\cathey c.cvm HESTER ENGINEERING COMPANY CulvertMaster v1 .o 11/08/01 08:08:45 AM ~ Haestad Methods, Inc. 37 Brookside Road Wstert>ury, CT 06708 USA (203) 755-1666 Page 1 of 5