2017-08-11_PERMIT FILE - C1981028 ‎(2)‎

• Permit No: C1981028
• IBM Index Class Name: Permit File
• Doc Date: 8/11/2017
• Section_Exhibit Name: Appendix K-6 Hydrologic Analysis Sediment Pond & Ditches
• Media Type: D
• Archive: No

Precipitation Frequency Data Server
http://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=40.1900&1...
NOAA Atlas 14, Volume 8, Version 2
Location name: Keenesburg, Colorado, US'
Latitude: 40.1900°, Longitude: -104.5000°
%TVElevation: 4813 W ;
' source: Google Maps W/
/
POINT PRECIPITATION FREQUENCY ESTIMATES
Sanja Penca, Deborah Ivhrtin.Sandra Pavlovic, Isharu Roy, Mchael SL Laurent, Carl'hypaluk, Dale
Unruh, Mchael Yelda, Geoffery Bonnin
NOAH, National Weather Service, Silver Spring, Maryland
PF tabular I PF graphical I Maps & aerials
PF tabular
PDS -based
point precipitation frequency estimates with 90% confidence intervals (in inches)1
Duration
Average recurrence interval (years)
1
2
5
10
25
50
100
200
500
1000
5 -min
0.245
0.297
0.395
0.488
0.635
0.762
0.902
1.06
1.28
1.46
(0.196-0.308)
(0.238-0.374)
(0.315-0.498)
(0.387-0.619)
(0.493-0.854)
(0.574-1.03)
(0.653-1.25)
(0.731-1.50)
(0.849-1.86)
(0.938-2.14)I
10 -min
0.359
0.435
0.579
0.715
0.930
1.12
1.32
1.55
1.87
2.14
(0.288-0.451)
(0.348-0.547)
0.461-0.730)
(0.567-0.906)
(0.722-1.25)
(0.840-1.51)
(0.957-1.83)
(1.07-2.19)
(1.37-3.13)
15 -min
0.438
0.531
0.705
0.872
1.13
1.36
1.61
1.89
2.29
2.61
(0.351-0.550)
(0.425-0.667)
(0.563-0.890
(0.691-1.10)
(0.881-1.52)
(1.02-1.84)
(1.17-2.23)
(1.31-2.68)
(1.52-3.33)
(1.68-3.81)
30 -min
0.586
0.709
0.941
1.16
1.51
1.82
2.16
2.53
3.07
3.51
(0.470-0.737)
(0.568-0.892)
(0.751-1.19)
(0.922-1.47)
(1.18-2.04)
(1.37-2.46)
(1.56-2.99)
(1.75-3.59)
(2.04-4.46)
(2.25-5.13)
60 -min
0.723
0.865
1.14
1.42
1.85
2.24
2.67
3.15
3.86
4.44
0.580-0.909
0.693-1.09
0.911-1.44
1.12-1.79
1.45-2.50
1.69-3.04
1.94-3.71
2.19-4.49)
2.56-5.62
2.85-6.48)
2 -hr
0.860
1.02
1.34
1.67
2.19
2.66
3.19
3.77
4.64
5.37
(0.695-1.07)
(0.824-1.27)
(1.08-1.68)
(1.33-2.09)
(1.73-2.94)
(2.03-3.59)
(2.33-4.39)
(2.64-5.33)
(3.12-6.71)
(3.47-7.76)
3 -hr
0.940
1.10
1.44
1.79
2.36
2.87
3.45
4.10
5.06
5.87
(0.762-1.16)
(0.895-1.37)
(1.17-1.80)
(1.44-2.23)
(1.87-3.16)
(2.20-3.85)
(2.54-4.73)
(2.89-5.76
(3.42-7.28)
(3.82-8.43)'
6 -hr
1.10
1.28
1.65
2.03
2.65
3.22
3.85
4.57
5.62
6.51
(0.900-1.35)
(1.05-1.58)
(1.35-2.04)
(1.64-2.52)
(2.12-3.52)
(2.49-0.28)
(2.86-5.23)
(3.25-6.35)
(3.83-8.00)
(4.27-9.25)
12 -hr
1.29
1.52
1.96
2.38
3.03
3.60
4.21
4.90
5.89
6.71
(1.06-1.57)
(1.25-1.85)
(1.61-2.39)
(1.94-2.91)
(2.42-3.93)
(2.79-4.70)
(3.15-5.63)
(3.50-6.71)
(4.04-8.26)
(4.45-9.44)
24 -hr
1.53
1.80
2.29
2.74
3.42
4.00
4.63
5.31
6.28
7.06
(1.27-1.84
(1.49-2.17)
(1.89-2.77)
2.25-3.33)
(2.75-4.37)
(3.12-5.15)
(3.48-6.09)
(3.82-7.16)
(4.34-8.68)
(4.73-9.83)
2 -day
1.75
2.08
2.66
3.16
3.89
4.48
5.10
5.75
6.66
7.38
(1.46-2.08)
1.74-2.49)
(2.21-3.19)
(2.62-3.81)
(3.13-4.87)
(3.51-5.67)
(3.85-6.61)
(4.17-7.64)
(4.63-9.08)
(4.99-10.2)
3 -day
1.91
2.25
2.83
3.34
4.08
4.68
5.30
5.96
6.87
7.59
(1.60-2.27)
(1.89-2.67)
2.37-3.38)
(2.78-4.00)
(3.29-5.07)
(3.68-5.88)
(4.03-6.82)
(4.34-7.87)
(4.81-9.31)
(5.16-10.4)
4 -day
2.04
2.38
2.97
3.48
4.22
4.82
5.45
6.11
7.03
7.75
(1.72-2.41)
(2.01-2.82)
(2.49-3.52)
(2.90-4.15)
(3.42-5.22)
(3.81-0.04)
(4.15-6.98)
(4.46-8.03)
(4.93-9.47)
(5.29-10.6)
7 -day
2.33
2.71
3.34
3.88
4.65
5.26
5.88
6.53
7.41
8.09
(1.98-2.73)
(2.29-3.18)
(2.83-3.94)
(3.26-4.60)
(3.79-5.69)
(4.18-6.51)
(4.51-7.46)
(4.80-8.49)
(5.24-9.88)
(5.57-10.9),
10 -day
2.57
2.99
3.68
4.25
5.05
5.67
6.29
6.93
7.78
8.43
(2.19-3.01)
(2.55-3.50)
(3.12-4.31)
(3.59-5.01)
(4.12-6.12)
(4.51-6.96)
(4.84-7.91)
(5.11-8.93)
(5.52-10.3)
5.83-11.3)
20 -day
3.30
3.80
4.59
5.25
6.13
6.80
7.45
8.11
8.96
9.60
2.84-3.83)
(3.26-4.40)
(3.93-5.34)
(4.46-6.12)
(5.03-7.33)
(5.46-8.24)
(5.78-9.25)
(6.04-10.3)
(6.42-11.7)
(6.71-12.8)
30 day
3.89
4.46
5.36
6.08
7.05
7.78
8.48
9.18
10.1
10.7
(3.36-4.49)
(3.85-5.14)
(4.61-6.19)
(5.20-7.06)
(5.81-8.37)
(6.27-9.37)
(6.61-10.4)
(6.86-11.6)
(7.24-13.0)
(7.53-14.1)
45 -day
4.61
5.28
6.34
7.18
8.29
9.10
9.87
10.6
11.6
12.2
(4.00-5.28)
(4.58-6.05)
(5.48-7.28)
(6.17-8.28)
(6.85-9.75)
(7.37-10.9)
(7.73-12.1)
(7.98-13.3)
(8.36-14.9)
(8.65-16.0)
60 -day
5.20
5.97
7.18
8.14
9.38
10.3
11.1
11.9
12.9
13.6
(4.53-5.93)
(5.20-6.82)
(6.23-8.22)
(7.02-9.36)
(7.78-11.0)
(8.35-12.2)
(8.73-13.5)
(8.99-14.9)
(9.36-16.5)
(9.65-17.7)
I Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS).
Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency
estimates (for a given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%. Estimates at
upper bounds are not checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values.
Please refer to NOAA Atlas 14 document for more information.
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