914-918 N Bewley St - REV 1 - Plan

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AREA-AVERAGED Fm(INCH/HR) = 0.15 AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.37 EFFECTIVE STREAM AREA(ACRES) = 0.11 TOTAL STREAM AREA(ACRES) = 0.11 PEAK FLOW RATE(CFS) AT CONFLUENCE = 0.44 **************************************************************************** FLOW PROCESS FROM NODE 60.00 TO NODE 70.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<< >>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 18.10 ELEVATION DATA: UPSTREAM(FEET) = 80.86 DOWNSTREAM(FEET) = 80.39 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20 SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.000 * 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.824 SUBAREA Tc AND LOSS RATE DATA(AMC II): DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.) COMMERCIAL A 0.01 0.40 0.100 32 5.00 SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40 SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100 SUBAREA RUNOFF(CFS) = 0.05 TOTAL AREA(ACRES) = 0.01 PEAK FLOW RATE(CFS) = 0.05 **************************************************************************** FLOW PROCESS FROM NODE 70.00 TO NODE 80.00 IS CODE = 31 ---------------------------------------------------------------------------- ** WARNING: Computed Flowrate is less than 0.1 cfs, Routing Algorithm is UNAVAILABLE. **************************************************************************** FLOW PROCESS FROM NODE 80.00 TO NODE 80.00 IS CODE = 1 ---------------------------------------------------------------------------- >>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<< >>>>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<<<<< ============================================================================ TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 5.00 RAINFALL INTENSITY(INCH/HR) = 4.82 AREA-AVERAGED Fm(INCH/HR) = 0.04 AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10 EFFECTIVE STREAM AREA(ACRES) = 0.01 TOTAL STREAM AREA(ACRES) = 0.01 PEAK FLOW RATE(CFS) AT CONFLUENCE = 0.05 ** CONFLUENCE DATA ** STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE 1 0.44 5.88 4.402 0.40( 0.15) 0.37 0.1 30.00 1 0.44 6.11 4.307 0.40( 0.15) 0.37 0.1 10.00 2 0.05 5.00 4.824 0.40( 0.04) 0.10 0.0 60.00 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE 1 0.46 5.00 4.824 0.40( 0.14) 0.34 0.1 60.00 2 0.49 5.88 4.402 0.40( 0.14) 0.34 0.1 30.00 3 0.49 6.11 4.307 0.40( 0.14) 0.34 0.1 10.00 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 0.49 Tc(MIN.) = 5.88 EFFECTIVE AREA(ACRES) = 0.12 AREA-AVERAGED Fm(INCH/HR) = 0.14 AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.34 TOTAL AREA(ACRES) = 0.1 LONGEST FLOWPATH FROM NODE 10.00 TO NODE 80.00 = 191.70 FEET. **************************************************************************** FLOW PROCESS FROM NODE 80.00 TO NODE 100.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<< >>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 78.17 DOWNSTREAM(FEET) = 78.15 FLOW LENGTH(FEET) = 2.60 MANNING'S N = 0.013 DEPTH OF FLOW IN 9.0 INCH PIPE IS 3.6 INCHES PIPE-FLOW VELOCITY(FEET/SEC.) = 2.90 ESTIMATED PIPE DIAMETER(INCH) = 9.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 0.49 PIPE TRAVEL TIME(MIN.) = 0.01 Tc(MIN.) = 5.89 LONGEST FLOWPATH FROM NODE 10.00 TO NODE 100.00 = 194.30 FEET. **************************************************************************** FLOW PROCESS FROM NODE 100.00 TO NODE 100.00 IS CODE = 1 ---------------------------------------------------------------------------- >>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<< ============================================================================ TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 5.89 RAINFALL INTENSITY(INCH/HR) = 4.40 AREA-AVERAGED Fm(INCH/HR) = 0.14 914-918 N Bewley St5/8/2025