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Data from "Precipitation- Frequency Atlas "
<br />U.S Dept of Commerce, NOAA, NWS, Silver Spring, MD 1973
<br />Source -NOAA Precipitation Frequency Estimates
<br />Region used to determine 2- and 100 -yr 1 -hr ve 2
<br />2
<br />2 -yr, 1 -hr precipitation = 0.613
<br />2 -yr, 6 -hr precipitation =
<br />0.966
<br />2 -yr, 2 -hr precipitation =
<br />0.739
<br />2 -yr, 3 -hr precipitation =
<br />0.810
<br />2 -yr, 24 -hr precipitation =
<br />1.440
<br />2 -yr, 12 -hr precipitation =
<br />1.180
<br />2 -yr, 5 -min precipitation =
<br />0.193
<br />2 -yr, 10 -min precipitation =
<br />0.282
<br />2 -yr, 15 -min precipitation =
<br />0.344
<br />2 -yr, 30 -min precipitation = 0.487
<br />Libei., Mine
<br />Western Colorado
<br />Go to NOAA web site and download rainfall
<br />data for the specific site being analyzed.
<br />Load the rainfall data into the table below.
<br />5 -yr, 1 -hr precipitation = 0.838
<br />5 -yr, 6 -hr precipitation =
<br />1.230
<br />5 -yr, 2 -hr precipitation =
<br />0.993
<br />5 -yr, 3 -hr precipitation =
<br />1.060
<br />5 -yr, 24 -hr precipitation =
<br />1.780
<br />5 -yr, 12 -hr precipitation =
<br />1.480
<br />5 -yr, 5 -min precipitation =
<br />0.270
<br />5 -yr, 10 -min precipitation =
<br />0.395
<br />5 -yr, 15 -min precipitation =
<br />0.482
<br />5 -yr, 30 -min precipitation = 0.683
<br />10 -yr, 1 -hr precipitation = 1.030
<br />10 -yr, 6 -hr precipitation =
<br />1.460
<br />10 -yr, 2 -hr precipitation =
<br />1.210
<br />10 -yr, 3 -hr precipitation =
<br />1.280
<br />10 -yr, 24 -hr precipitation =
<br />2.090
<br />10 -yr, 12 -hr precipitation =
<br />1.750
<br />10 -yr, 5 -min precipitation =
<br />0.337
<br />10 -yr, 10 -min precipitation =
<br />0.494
<br />10 -yr, 15 -min precipitation=
<br />0.602
<br />10 -yr, 30 -min precipitation = 0.851
<br />Design return period, years 25 1 1 50 1 1 100 1
<br />25 -yr, 1 -hr precipitation = 1.300
<br />25 -yr, 6 -hr precipitation =
<br />1.780
<br />25 -yr, 2 -hr precipitation =
<br />1.510
<br />25 -yr, 3 -hr precipitation =
<br />1.580
<br />25 -yr, 24 -hr precipitation =
<br />2.550
<br />25 -yr, 12 -hr precipitation =
<br />2.130
<br />25 -yr, 5 -min precipitation =
<br />0.434
<br />25 -yr, 10 -min precipitation =
<br />0.635
<br />25 -yr, 15 -min precipitation =
<br />0.774
<br />25 -yr, 30 -min precipitation =
<br />1.090
<br />50 -yr, 1 -hr precipitation =
<br />1.510
<br />50 -yr, 6 -hr precipitation =
<br />2.030
<br />50 -yr, 2 -hr precipitation =
<br />1.750
<br />50 -yr, 3 -hr precipitation =
<br />1.810
<br />50 -yr, 24 -hr precipitation =
<br />2.930
<br />50 -yr, 12 -hr precipitation =
<br />2.440
<br />50 -yr, 5 -min precipitation =
<br />0,511
<br />50 -yr, 10 -min precipitation =
<br />0.748
<br />50 -yr, 15 -min precipitation =
<br />0.913
<br />50 -yr, 30 -min precipitation =
<br />1.280
<br />100 -yr, 1 -hr precipitation = 1.730
<br />100 -yr, 6 -hr precipitation = 2.290
<br />100 -yr, 2 -hr precipitation = 1.990
<br />100 -yr, 3 -hr precipitation = 2.050
<br />100 -yr, 24 -hr precipitation = 3.340
<br />100 -yr, 12 -hr precipitation = 2.770
<br />100 -yr, 5 -min precipitation= 0.591
<br />100 -yr, 10 -min precipitation =0.866
<br />100 -yr, 15 -min precipitation =1.060
<br />100 -yr, 30 -min precipitation =1.470
<br />Souder Miller - On Site 12/26/2013
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