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2010-12-17_REVISION - C1981019 (153)
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2010-12-17_REVISION - C1981019 (153)
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Last modified
8/24/2016 4:28:04 PM
Creation date
12/30/2010 10:50:25 AM
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DRMS Permit Index
Permit No
C1981019
IBM Index Class Name
REVISION
Doc Date
12/17/2010
Doc Name
Exhibit 7 Item 21 Collom Project Pre-Feasibility Hdyrology Report
Type & Sequence
PR3
Email Name
JRS
Media Type
D
Archive
No
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14 <br />In addition to the four Colow stations, the Western Regional Climate Center WRCC <br />�^IY 9 ( WRCC ) <br />reports data from the communities of Craig, Hamilton, Hayden, Maybell and Meeker <br />(Figure 3.1). The data from Craig come from two stations (Craig and Craig 4SW), owing <br />to a shift in location in late 1976. Data from the WRCC stations include temperature <br />(average, maximum and minimum), and precipitation (as rain and snow) (WRCC, <br />2005a). Raw data from the WRCC stations are provided in Appendices 3.13 and 3.C. <br />The Colowyo rain gages have a period of record from 1998 to the present. As indicated <br />in Table 3.1, the completeness of both the Colowyo and WRCC stations varies. The <br />record for the WRCC stations (excepting the recent data from Craig 4SW) are fairly <br />complete. Table 3.1 lists the number of missing days in the precipitation record for the <br />years 1998 through 2003. <br />Table 3.1 Precipitation period of record and missing data <br />Average annual precipitation at each station is shown in Table 3.2. Yearly averages <br />based on complete or nearly complete (less than ten missing days in a year) records are <br />shown in bold. <br />Data on wind speed and direction were obtained from the Craig, Hayden, and Meeker <br />airports (WRCC, 2005b). Evaporation data were obtained from previous studies in the <br />vicinity of the Collom study area (VTN Colorado, 1976) and regional maps generated by <br />NOAA (1982). <br />(0 <br />2572 -R2 Colowyo Coal Company <br />Water Management Consultants <br />Source - Location <br />Elev <br />Period of <br />Approx. # of days of missing data (1998 -2003) <br />record <br />1998 <br />1999 <br />2000 <br />2001 <br />2002 <br />2003 <br />total <br />total <br />total <br />total <br />total <br />total <br />(ft) <br />(days) <br />(days) <br />(days) <br />(days) <br />(days) <br />(days) <br />Colowyo -SCN 16 <br />7,817 <br />1998 -2003 <br />0 <br />0 <br />95 <br />0 <br />59 <br />0 <br />Colowyo -WSTPT <br />7,403 <br />1998 -2003 <br />0 <br />0 <br />95 <br />77 <br />0 <br />18 <br />C <br />Colowyo -SCN 34 <br />Colowyo - GOSSARD <br />7,205 <br />6,375 <br />1998 -2003 <br />1998 -2003 <br />1 <br />1 <br />5 <br />0 <br />2 <br />122 <br />0 <br />0 <br />16 <br />0 <br />0 <br />0 <br />WRCC -Craig <br />Unknown <br />1948 -1976 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />WRCC -Craig 4SW <br />6,440 <br />1977 -2004 <br />66 <br />61 <br />58 <br />41 <br />18 <br />11 <br />WRCC - Hamilton <br />6,240 <br />1948 -2004 <br />1 <br />0 <br />0 <br />0 <br />31 <br />2 <br />WRCC- Hayden <br />6,440 <br />1948 -2004 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />WRCC- Maybell <br />5,910 <br />1958 -2004 <br />8 <br />22 <br />8 <br />3 <br />1 <br />6 <br />WRCC- Meeker <br />6,240 <br />1900 -2004 <br />3 <br />3 <br />5 <br />7 <br />3 <br />1 <br />Average annual precipitation at each station is shown in Table 3.2. Yearly averages <br />based on complete or nearly complete (less than ten missing days in a year) records are <br />shown in bold. <br />Data on wind speed and direction were obtained from the Craig, Hayden, and Meeker <br />airports (WRCC, 2005b). Evaporation data were obtained from previous studies in the <br />vicinity of the Collom study area (VTN Colorado, 1976) and regional maps generated by <br />NOAA (1982). <br />(0 <br />2572 -R2 Colowyo Coal Company <br />Water Management Consultants <br />
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