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2012-04-10_REVISION - M1981185 (43)
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2012-04-10_REVISION - M1981185 (43)
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6/16/2021 6:05:27 PM
Creation date
4/24/2012 4:06:02 PM
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DRMS Permit Index
Permit No
M1981185
IBM Index Class Name
REVISION
Doc Date
4/10/2012
Doc Name
TECHNICAL REVISION (TR02)
From
WILDCAT MINING CORP.
To
DRMS
Type & Sequence
TR2
Email Name
DMC
SSS
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D
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NRCS <br />Soil Types <br />Values of Correction Factors KCD& KA <br />Storm Return Period <br />2 -yr <br />5 -yr <br />10 -yr <br />25 -yr <br />50-yr <br />100 -yr <br />C & D <br />000 <br />I l0.7+01 i <br />1010.7+121) <br />1- 028.1+0 391 <br />I-0 33•1+0401 <br />I-0 39 +0 461 <br />A <br />000 <br />I- 008.1+0 091 <br />1-014.1 +0 17) <br />11119.1 +0 241 <br />1022.11028) <br />10254 +0 321 <br />Imperv. <br />Ratio (I) <br />Values of Runoff Coefficient C <br />Values of Runoff Coefficient C <br />Type C and D NRCS Hydrologic Soil Cnnps <br />Type A NRCS Hydrologic Sods Group <br />2-yr <br />5-yr <br />10-yr <br />25 -yr <br />5l1 -yr <br />100-yr <br />2-yr <br />Syr <br />10-yr <br />25 -yr <br />50-yr <br />0 18 <br />I00-yr <br />0.20 <br />0.00 <br />0.04 <br />0.15 <br />0.25 <br />0 37 <br />0.44 <br />050 <br />-0.12 <br />-0.03 <br />0.05 <br />0.12 <br />0.05 <br />008 <br />0.18 <br />0 28 <br />0.39 <br />0.46 <br />0 52 <br />-0.07 <br />0.02 <br />0.10 <br />0.18 <br />0.20 <br />0.24 <br />0.10 <br />0.11 <br />0.21 <br />0.30 <br />0.41 <br />0.48 <br />0.53 <br />-0.02 <br />0.08 <br />0.14 <br />0.20 <br />0.24 <br />0.28 <br />0.15 <br />0.14 <br />0 24 <br />0.32 <br />0.43 <br />0.49 <br />0.54 <br />0.02 <br />0.10 <br />0.17 <br />0.23 <br />0 27 <br />0.30 <br />0.20 <br />0.17 <br />0 26 <br />0.34 <br />0.44 <br />0.50 <br />0.55 <br />0.08 <br />0.13 <br />0.20 <br />0 26 <br />0.30 <br />0.33 <br />0 25 <br />0 20 <br />0.28 <br />0.38 <br />0.48 <br />0.52 <br />0 58 <br />009 <br />0.18 <br />0.23 <br />0.29 <br />0.32 <br />0.35 <br />0.30 <br />0 22 <br />0.30 <br />038 <br />0.47 <br />0.53 <br />0.57 <br />0.13 <br />0.19 <br />0.25 <br />0.31 <br />0.34 <br />0.37 <br />0.35 <br />0 25 <br />0.33 <br />0.40 <br />0 48 <br />054 <br />0 57 <br />0.18 <br />0.22 <br />0.28 <br />0 33 <br />036 <br />039 <br />0.40 <br />0 28 <br />0.35 <br />0.42 <br />050 <br />0.55 <br />058 <br />0.19 <br />0.25 <br />0.30 <br />0.35 <br />038 <br />0.41 <br />0.45 <br />0.31 <br />0 37 <br />0.44 <br />0.51 <br />0.58 <br />0.59 <br />022 <br />0.27 <br />0.33 <br />0.37 <br />0.40 <br />0.43 <br />0.50 <br />0.34 <br />0.40 <br />0.46 <br />0.53 <br />0.57 <br />0.80 <br />0.25 <br />0.30 <br />0.35 <br />0.40 <br />0.42 <br />0.45 <br />0.55 <br />0.37 <br />043 <br />0.48 <br />0.55 <br />0 59 <br />0.62 <br />0.29 <br />0.33 <br />0.38 <br />0.42 <br />0.45 <br />0.47 <br />0 60 <br />0.41 <br />0.46 <br />0.51 <br />0.57 <br />0.61 <br />0.63 <br />0.33 <br />0.37 <br />0.41 <br />0.45 <br />0.47 <br />0.50 <br />065 <br />0.45 <br />0.49 <br />0.54 <br />0.59 <br />0.63 <br />0.65 <br />0.37 <br />0.41 <br />0.45 <br />0.49 <br />0.51 <br />0.53 <br />0.70 <br />0.49 <br />0.53 <br />0.57 <br />0.82 <br />066 <br />0.68 <br />0.42 <br />0.45 <br />0.49 <br />0.53 <br />0.54 <br />0.56 <br />0.75 <br />054 <br />0.58 <br />082 <br />086 <br />069 <br />0.71 <br />0.47 <br />0.50 <br />054 <br />0.57 <br />0.59 <br />0.61 <br />0.80 <br />0.60 <br />0.63 <br />0.66 <br />0.70 <br />0.73 <br />0.74 <br />0.54 <br />056 <br />0.60 <br />0.63 <br />0.64 <br />0.66 <br />0.85 <br />066 <br />0.88 <br />0.71 <br />0.75 <br />0.78 <br />0.79 <br />0.61 <br />063 <br />066 <br />0.89 <br />0.70 <br />0.72 <br />0.90 <br />0.73 <br />0.75 <br />077 <br />080 <br />083 <br />083 <br />069 <br />0.71 <br />0.73 <br />0.76 <br />0.77 <br />0.79 <br />0.95 <br />0.80 <br />0 82 <br />084 <br />0.87 <br />0 89 <br />0 89 <br />0.78 <br />080 <br />0 82 <br />0.84 <br />0.85 <br />0.86 <br />1 00 <br />0.89 <br />090 <br />092 <br />0.94 <br />096 <br />0.96 <br />0 89 <br />090 <br />0.92 <br />094 <br />0.95 <br />0.96 <br />Runoff Coefficient vs. Watershed Imperviousness <br />Based on Runoff Coefficient estimating equation published by Urbonas, et.al. (1990) & WEF (1998) <br />Desk ecuatlon for NRCS Sall Types C & D: <br />Cc, = K co + (0.e58N' . 0.786•1' + 0.7749 + 0.04) <br />Deck eauetlon for NRCS Soli Tyne k <br />C + 11.31.1'• 1.449'+1.1359.0.12) In which use values for C, >0 <br />in which: / = /, /100, imperviousness ratio <br />1, = watershed imperviousness in percent <br />C, = Runoff Coefficient for NRCS Soil Type A <br />K = Correction factor for CA when the storm return period is greater than 2 -years <br />C, = Runoff Coefficient for NRCS Sod Types C and D <br />K = Correction factor for C,- when the storm m return period n greater than 2 -yea <br />1 <br />v <br />1 00 <br />0.90 <br />0 80 <br />0.70 <br />0.60 <br />0. <br />0.40 <br />030 <br />0.20 <br />0.10 <br />0.00 <br />0.0 0.1 <br />Ric T ype B Sorb, use the aye age of coetficems C CD and CA <br />When the Runoff Coefficient in above table is < 0, use 0 <br />When composnutg the Runoff Coefficient for different soil types, use the table values above regardless if they are < 0. <br />Runoff Coefficient vs. Imperviousness <br />NRCS Hydrologic Soils C & D <br />v11111.11R1 sue.. M <br />02 03 0.4 05 08 07 08 0.9 10 <br />Watershed Impervious Ratio <br />- at- 100-yr <br />25-yr <br />- + -10-yr <br />Page 1 <br />1.00 <br />090 <br />080 <br />0.70 <br />0.80 <br />C.) 0.50 <br />0.40 <br />0.30 <br />0 20 <br />010 <br />0.00 <br />0.0 <br />Runoff Coefficient vs. Imperviousness <br />NRCS Hydrologic Soil A <br />0.1 0.2 03 04 05 08 07 08 0.9 1.0 <br />Watershed Impervious Ratio <br />- 0- 100-yr <br />-4 25-yr <br />-+- l0•yr <br />- +-5•yr <br />- *-2•Y, <br />
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