2014-09-16_REVISION - M1982020 ‎(9)‎

• Permit No: M1982020
• IBM Index Class Name: REVISION
• Doc Date: 9/16/2014
• Doc Name: Designated mining operation ‎(DMO)‎ Permit Amendment AM01
• From: Aspen Mineral Resources, Inc.
• To: DRMS
• Type & Sequence: AM1
• Email Name: RCO
• Media Type: D
• Archive: No

northwesterly winds tend to bring cooler temperatures. During winter fronts are nearly always
out of the west with precipitation occurring dependent on temperature variations and air
moisture on the edge of the front. The period of mid -July to mid- September is dominated by
the Bermuda high that sets up that time of year. Whether moisture is brought into this mid -
continent area depends on the location of the low and its strength. The highest chance for
rainfall comes from the south to southwest.
(b((iii)
The monthly mean temperature is shown in the Table below based on 30 years records:
Sourced from National Weather Service Data
(b)(iv)
A review of the average humidity for the general area, outside of the irrigated bottoms and
town, shows it to be generally less than 20 percent. As would be expected, evaporation rates
were reviewed in the general Gunnison vicinity and found to be quite high. The average for the
Front Range area is on the order of 36 to 40 inches. The typical National Weather Service pan
evaporation data for this area shows it to exceed 40 inches of water per year. This amount of
evaporation greatly exceeds the annual rainfall indicating that if the assumption were made
that the entire precipitation captured in the detention areas were not recycled nor allowed to
infiltrate, the evaporation would greatly exceed the total precipitation by at least a factor of
three.
17
Annual
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Av
Mean
Temperature
7.4
13
25.1
36.1
46.3
54.8
61
58.6
50.5
40.4
26.9
13.1
36.1
(F)
Sourced from National Weather Service Data
(b)(iv)
A review of the average humidity for the general area, outside of the irrigated bottoms and
town, shows it to be generally less than 20 percent. As would be expected, evaporation rates
were reviewed in the general Gunnison vicinity and found to be quite high. The average for the
Front Range area is on the order of 36 to 40 inches. The typical National Weather Service pan
evaporation data for this area shows it to exceed 40 inches of water per year. This amount of
evaporation greatly exceeds the annual rainfall indicating that if the assumption were made
that the entire precipitation captured in the detention areas were not recycled nor allowed to
infiltrate, the evaporation would greatly exceed the total precipitation by at least a factor of
three.
17