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2010-05-07_REVISION - M1977493 (10)
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2010-05-07_REVISION - M1977493 (10)
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Last modified
6/15/2021 5:47:15 PM
Creation date
5/12/2010 8:02:00 AM
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Template:
DRMS Permit Index
Permit No
M1977493
IBM Index Class Name
REVISION
Doc Date
5/7/2010
Doc Name
Amendment Application- Part 2
From
Climax Molyb
To
DRMS
Type & Sequence
AM6
Email Name
ACS
Media Type
D
Archive
No
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• Table K-8 <br />NOAA Atlas 2 Design Rainfall <br />Job No.: 1051.27.01 <br />Project: Climax Mine <br />Client: Climax Molybdenum Company <br />Subject: NOAA Atlas II - Rainfall Depth-Duration <br />Calcs by: Mike Stonefelt <br /> Return Period <br />Duration (min) 2 5 10 25 50 100 200 500 1000 <br />5-min 5 0.19 0.26 0.31 0.37 0.42 0.48 0.52 0.59 0.64 <br />10-min 10 0.30 0.41 0.48 0.57 0.65 0.74 0.81 0.91 0.99 <br />15-min 15 0.38 0.52 0.60 0.72 0.82 0.94 1.03 1.16 1.25 <br />30-min 30 0.53 0.71 0.84 1.00 1.14 1.30 1.42 1.60 1.74 <br />1-hr 60 0.67 0.90 1.06 1.26 1.45 1.65 1.80 2.03 2.20 <br />2-hr 120 0.78 1.06 1.23 1.51 1.70 1.88 2.09 2.35 2.55 <br />3-hr 180 0.86 1.16 1.34 1.68 1.87 2.03 2.29 2.57 2.79 <br />6-hr 360 1.00 1.35 1.55 2.00 2.20 2.32 2.66 2.98 3.23 <br />12-hr 720 1.18 1.60 1.84 2.36 2.61 2.86 3.21 3.61 3.92 <br />24-hr 1440 1.39 1.90 2.20 2.80 3.10 3.51 3.88 4.38 4.75 <br />Notes: Latitude: 39.3667 Longitude: 106.1833 Elevation: 11,294 ft <br />{2-yr,6-hr), {2-yr,24-hr), {100-yr,6-hr), and (100-yr,24-hr) values from hftp://hdsc.nws.noaa.gov. <br />15-yr thru 50-yr,6-hr) and {5-yr thru 50-yr,24-hr) values from NOAA Atlas 2, Colorado. <br />Equations apply to NOAA Atlas 2 (Colorado) Region 2, which includes: Upper Colorado River Basin <br />Eauations for 5-min. 10-min. 15-min. 30-min. 2-hr. 3-hr, and 12-hr precip depths for all return periods <br />(5-min) = 0.29 * {1-hr) (NOAA) <br />• <br />{10-min) = 0.45 * {1-hr) (NOAA) <br />(15-min) = 0.57 * {1-hr) (NOAA) <br />(30-min) = 0.79 * {1-hr) (NOAA) <br />{2-hr) = 0.341 * (6-hr) + 0.659 * (1-hr) (NOAA, region 2) <br />{3-hr) = 0.569 * {6-hr) + 0.431 * {1-hr) (NOAH, region 2) <br />{12-hr) = 0.55 * (6-hr) + 0.45 * {24-hr) (Wheeler) <br />Eauations for 1-hr precip deaths for 2-vr. 5-vr. 10-vr. 25-vr. 50-vr, and 100-vr return periods <br />(2-yr,l-hr) = -0.011 + 0.942 * (6-hr)2 / {24-hr) (NOAA, region 2) <br />(5-yr,1-hr) = 0.241 * {100-yr,1-hr) + 0.759 * (2-yr,1-hr) (Wheeler) <br />{10-yr,l-hr) = 0.399 * {100-yr,l-hr) + 0.601 * {2-yr,l-hr) (Wheeler) <br />(25-yr,1-hr) = 0.607 * (100-yr,1-hr) + 0.392 * {2-yr,1-hr) (Wheeler) <br />(50-yr,l-hr) = 0.791 * (100-yr,l-hr) + 0.209 * {2-yr,l-hr) (Wheeler) <br />{100-yr,1-hr) = 0.494 + 0.755 * {6-hr)2 / (24-hr) - 0.008 (NOAA, region 2) <br />Equations to extrapolate 1-hr. 6-hr, and 24-hr precip depths for 200-yr, 500-yr, and 1000-yr return periods <br />{1-hr) = LOG. [ (x-yr) / b ] (Wheeler) <br />(6-hr) = LOG. [ {x-yr) / b ] (Wheeler) <br />(24-hr) = LOG. [ {x-yr) / b ] (Wheeler) <br />y = b* MAX m b <br />1-hr 57.44 0.14 <br />6-hr 16.45 0.12 <br />24-hr 6.32 0.16 <br />• <br />Exhibit K Table K-8 May 2010
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