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2012-01-23_REVISION - M1981021
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2012-01-23_REVISION - M1981021
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Last modified
6/15/2021 2:25:36 PM
Creation date
1/27/2012 8:10:28 AM
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Template:
DRMS Permit Index
Permit No
M1981021
IBM Index Class Name
REVISION
Doc Date
1/23/2012
Doc Name
Final EPP wit Constr. Schedule.
From
Denison Mines
To
DRMS
Type & Sequence
AM1
Email Name
RCO
SSS
Media Type
D
Archive
No
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C \Users\cwoodwardlDesktop \ Sundays \FINAL - Environmental Protection Plan Sunday Mines Revised January 2012 docx <br />Section 12 <br />Climate <br />12.3 Mean Monthly Temperatures and Ranges <br />Table 12 -3 shows the monthly average maximum and minimum temperatures for the <br />period of record. Large daily temperature fluctuations are typical for this semi -arid to <br />arid region, with upwards of 30° Fahrenheit (F) to 40° F fluctuations between night <br />and day during most of the year. Summer high temperatures can reach 100 °F or <br />greater and winter low temperatures can reach below 0° F, however, daytime highs in <br />the winter are normally above freezing (32° F). <br />12.4 Evaporation Rates <br />Pan evaporation data are not available at the Uravan station. Therefore, pan <br />evaporation data were collected from a monitoring station at Dead Horse Creek near <br />Naturita, Colorado. The period of record for these data extends from 1971 to 1980. <br />Table 12 -4 shows the pan evaporation data from the monitoring station at Dead Horse <br />Creek near Naturita, Colorado. Figure 12 -4 illustrates the relationship between <br />average monthly precipitation measured in Uravan and average monthly pan <br />evaporation from the Dead Horse Creek monitoring station data. This figure shows <br />that monthly pan evaporation is greater than monthly precipitation from April <br />through October. During the late fall to early spring months (November through <br />March), pan evaporation is not measured due to regular freezing temperatures at <br />night and daily thaw. Actual evaporation is likely to be less than pan evaporation due <br />to affects such as available soil moisture, infiltration into the subsurface, variations in <br />surface topography, and differences related to the effect of the evaporation pan on <br />measured evaporation rates. Pan evaporation exceeds precipitation by approximately <br />4 times based on the available data. <br />12 -2 <br />
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