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PERMFILE128149
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PERMFILE128149
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Last modified
8/24/2016 10:25:17 PM
Creation date
11/25/2007 5:41:51 PM
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Template:
DRMS Permit Index
Permit No
M1989065
IBM Index Class Name
Permit File
Doc Date
8/15/1989
Doc Name
HALLETT MATERIALS WINKLER QUARRY WILLOW CREEK OPEN CHANNEL FLOW CULVERT TAILWATER
Media Type
D
Archive
No
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i <br />HALLETT MATERIALS - WINKLER QUARRY <br />DRAINAGE REPORT <br />RATIONAL METHOD STORM RUNOFF <br />TIME OF CONCENTRATION <br />INITIAL (OVERLAND) TIME <br /> <br />TA 88-146 <br />08/15/89 <br />SUB-BASIN G <br />L = 500 FT OVERLAND DISTANCE IN FEET <br />S = 1.5 $ SLOPE IN PERCENT <br />CS = 0.10 OPEN AREA - CLAYEY SOIL <br />Ti = 35.16 MIN 1.8*(1.1-C5)*( L )".5 / ( S )"1/3 <br /> (UDFCD CRITERIA MANUAL) <br />TRAVEL TIME <br />L = 250 FT TRAVEL DISTANCE IN FEET <br />S = 1.5 ~ SLOPE IN PERCENT <br />V = 2.3 FPS ( S ) " 2 CURVE FIT SCS VEL CURVE <br />Tt = 1.85 MIN DISTANCE / VELOCITY <br />Tc = 37.01 MIN Ti + Tt <br /> C2 CS C10 C100 <br />RUNOFF UDFCD <br />COEFFICIENTS 0.05 0.10 0.20 0.40 CLAYEY SOIL <br />AREA 23.9 acr es <br />RAINFALL I2 IS I10 I100 <br />INTENSITIES DOUGLAS COUNTY <br />(INCHES/HR) 1.49 2.01 2.33 3.65 ZONE I <br /> Q2 Q5 Q10 Q100 <br />PEAK RUNOFF <br />(CFS) 1.78 4.80 11.14 34.89 Q = c i A <br />ONE-HOUR V2 V5 V10 V100 <br />VOLUME <br />(CUBIC FT) 3,949 10,655 24,737 77,490 V = Q*Tc (FAA) <br />(ACRE*FEET) 0.09 0.24 0.57 1.76 <br />
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