2008-11-03_REVISION - M1999098

• Permit No: M1999098
• IBM Index Class Name: REVISION
• Doc Date: 11/3/2008
• Doc Name: Amendment Submittal
• From: Aggregate Industries WCR, Inc.
• To: DRMS
• Type & Sequence: AM1
• Media Type: D
• Archive: No

EXHIBIT K
Climate
The subject site area has a high plain, continental climate. With the mountains to the west,
variations in temperature are wide. In the high plains area, rainfall is light and humidity is
low.
The average frost-free period is 172 days. Annual average precipitation is about 14
inches.
In the eastern high plains area, the climate is modified considerably from that expected of
a typical high plain because of the nearby mountains to the west. The winds characteristic
of the plains are reduced somewhat by the shielding effect of the mountains.
Climate data for the Site is assumed to be similar to that of a weather station at Greeley
UNC, Colorado. The Western Regional Climate Center tracks temperature extremes and
precipitation data for this station. The following table includes data that was collected
between March 1, 1967 and April 30, 2007.
GREELEY UNC, COLORADO (053553)
Period of Record Monthly Climate Summary
Period of Record: 3/1/1967 to 4/30/2007
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Average Max.

Temperature (F) [41.4 46.8 55.8 64.3 [73.3 83.7 [89.7 87.6 79.2] [66 4 507
? 42.1
? 65.1
?
Average Min.
Temperature (F) 15.4 F19 9 26.8 34.8 4 . 7 354
? 24.5
? ? ?
Average Total

Precipitation (in.) 0.49 0.37 1.07 H [2.43 1.87 1.50 Fl.15 ? 1.10 1.03
? 0.77
? 0.47
? 14.03
?
Average Total
?SnowFall (in.) 6.1 4.4 7.3 5.1 0.9 0.0 0.0
?? 0.0 0.7
?? 3.1 7.0
?? 5.8 40.4
Average Snow
)
[Depth (in ? ? ? ? ? ? ? ? 0
? 0
? 1
? 1
? 0
?
.
Percent of possible observations for period of record.
Max. Temp.: 100% Min. Temp.: 100% Precipitation: 100% Snowfall: 97.8% Snow Depth:
95.3%
Check Station Metadata or Metadata graphics for more detail about data completeness.
Source: Western Regional Climate Center, www.wrcc.dri.edu/cgi-bin/cliMAIN.pl?co3553.
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Amendment to Permit M1999098 112c
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