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2010-07-16_REVISION - C1981019
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2010-07-16_REVISION - C1981019
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Entry Properties
Last modified
8/24/2016 4:16:20 PM
Creation date
7/16/2010 2:27:06 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981019
IBM Index Class Name
REVISION
Doc Date
7/16/2010
Doc Name
2nd Adequacy Letter
From
DRMS
To
Colowoyo Coal Company
Type & Sequence
TR81
Email Name
JRS
SB1
Media Type
D
Archive
No
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and what Colowyo currently has permitted (is proposing to permit). Please <br />update the text on page South Taylor/Lower Wilson - Rule 4, Page 30 to <br />reflect the historic nature of the original steep slope mining conditions in the <br />South Taylor Pit. Please include a discussion of the changes made to the <br />mine plan, post-mining topography, permanent fills and the elimination of <br />the steep slope areas in this section. <br />b. On the second line of the paragraph that continues over to page South <br />Taylor/Lower Wilson - Rule 4, Page 31 Colowyo states "...it is necessary to <br />extend their toes about 600 to 900 feet to the north, respectively..." There are <br />two problems with this sentence. First, the fills are not mentioned by name in this <br />paragraph so using the term "respectively" does not mean anything. Second, <br />when Colowyo states "600 to 900 feet" it appears as though Colowyo is giving a <br />possible range for the extension of the toes of the fills, which is not the case. <br />Colowyo is proposing to extend each fill a certain, defined length. Please correct <br />the second sentence in the first paragraph of page South Taylor/Lower <br />Wilson - Rule 4, Page 31to include referring to each of the fills by name (the <br />East Taylor and West Taylor Fills). Please also correct the language <br />discussing the length each of the toes of the fills will be extended to make it <br />clear. <br />c. In the third paragraph on page South Taylor/Lower Wilson - Rule 4, Page <br />31 Colowyo discusses decreasing the gradients of slopes as a result of the variance <br />from AOC and the effect this will have on the hydrology of the reclaimed South <br />Taylor Pit. Since Colowyo no longer needs a variance from AOC for steep slope <br />mining, Colowyo will need to revise this paragraph. Please revise the third <br />paragraph on page South Taylor/Lower Wilson - Rule 4, Page 31to eliminate <br />references to a variance from AOC for steep slope mining in the South <br />Taylor Pit. <br />d. In the first sentence on the top of page South Taylor/Lower Wilson - Rule 4, Page <br />32 Colowyo references the Streeter Fill, West Pit Fill and Section 16 Fill. These <br />fills are not relevant to the South Taylor Pit and the correct fill references should <br />be included here (the West Taylor and East Taylor Fills). Please correct the <br />language in the first sentence on the top of page South Taylor/Lower Wilson <br />- Rule 4, Page 32 to eliminate the erroneous reference to the Streeter, West <br />Pit and Section 16 Fills. Please include the correct reference to the West <br />Taylor and East Taylor Fills. <br />e. The bottom of page South Taylor/Lower Wilson - Rule 4, Page 32 contains the <br />statement "END OF PERMIT REVISION APPLICATION PR-02". Please <br />remove this statement. <br />45. On page South Taylor/Lower Wilson - Rule 2, Page 104 (under Rule 2.05.4(2)(c)), <br />Colowyo discusses the mining sequence in the South Taylor Pit. This mining sequence is <br />being changed as a result of Technical Revision 81. Please change the description of <br />the mining sequence in the South Taylor Pit on page South Taylor/Lower Wilson - <br />Rule 2, Page 104.
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