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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
Metadata
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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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<br />HALLETT MATERIALS - WINKLER QUARRY TA 88-146 <br />DRAINAGE REPORT 08/15/89 <br />RATIONAL METHOD STORM RUNOFF SUB-BASIN EE <br />TIME OF CONCENTRATION <br />INITIAL (OVERLAND) TIME <br />L 500 FT OVERLAND DISTANCE IN FEET <br />S = 2.0 $ SLOPE IN PERCENT <br />C5 = 0.10 OPEN AREA - CLAYEY SO IL <br />Ti = 31.95 MIN 1.8*(1.1-CS)*( L )".5 / ( S )"1/3 <br /> (UDFCD CRIT ERIA MANUAL) <br />TRAVEL TIME <br />L = 400 FT TRAVEL DISTANCE IN FE ET <br />S = 2.5 ~ SLOPE IN PERCENT <br />V = 6.3 FPS ( S ) 2 CURVE FIT SCS VEL CURVE <br />Tt 1.07 MIN DISTANCE / VELOCITY <br />Tc = 33.01 MIN Ti + Tt <br /> C2 C5 C10 C100 <br />RUNOFF UDFCD <br />COEFFICIENTS 0.05 0.10 0.20 0.q0 CLAYEY SOIL <br />AREA 56.8 acr es <br />RAINFALL I2 I5 I10 I100 <br />INTENSITIES DOUGLAS COUNTY <br />(INCHES/HR) 1.60 2.16 2.51 3.93 ZONE I <br /> Q2 Q5 Q10 Q100 <br />PEAK RUNOFF <br />(CFS) 4.55 12.29 28.52 89.35 Q = c i A <br />ONE-HOUR V2 VS V10 V100 <br />VOLUME <br />(CUBIC FT) 9,019 24,334 56,495 176,973 V = Q*Tc (FAA) <br />(ACRE*FEET) 0.21 0.56 1.30 4.06 <br />
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