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2019-02-22_REPORT - C1981019
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2019-02-22_REPORT - C1981019
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Last modified
2/25/2019 9:34:23 AM
Creation date
2/22/2019 12:34:25 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981019
IBM Index Class Name
Report
Doc Date
2/22/2019
Doc Name
Annual Hydrology Report
From
Tri-State Generation and Transmission Association, Inc
To
DRMS
Annual Report Year
2018
Permit Index Doc Type
Hydrology Report
Email Name
ZTT
Media Type
D
Archive
No
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Colowyo Coal Company <br />2018 Annual Reclamation and Hydrology Report <br />Several active native springs have been identified on the reclaimed surface at the <br />Colowyo Mine. These springs are the result of groundwater movement from <br />groundwater complexes that were present pre -mining, whose waters pass through <br />regraded overburden subsurface from the highwall (non -mined areas), and emerge at a <br />location down gradient in the reclaimed surface. Colowyo has detected four springs that <br />originate from non -mined areas in the highwall and percolate through the regraded spoil <br />and emerge on the reclaimed surface. Two springs are located just south of the East <br />Taylor Pond in reclamation parcel WP014. Each of these springs are located where the <br />final highwall was regraded to the approved post mining topography (PMT). Two <br />additional springs have been located in the East Pit reclamation parcel EP057, south of <br />the Final East Pit Ditch where the final highwall was regraded to PMT. <br />Page 17 <br />
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