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REV103372
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REV103372
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Entry Properties
Last modified
8/25/2016 1:14:12 AM
Creation date
11/22/2007 1:05:38 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007
IBM Index Class Name
Revision
Doc Date
1/28/2005
Doc Name
Review Letter
From
USFS
To
DMG
Type & Sequence
PR10
Media Type
D
Archive
No
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2.04-44 - 151 sentence <br />In some cases determining the cause of rockfalls (either natural or mining induced) is quite easy <br />to make (e.g. Bowie's recent release in Hubbard Canyon). Please add a related comment that <br />states unless rockfalls occur inclose temporal and spatial timing to a passing longwall (likely <br />induced by subsidence from mining) iY is difficult to determine if it was natural or mining <br />induced... <br />2.04-44 <br />This discussion should include that the active ground water zone includes water in near surface <br />fractures (especially along outcrops) that daylights along cliff Faces in the form of springs or <br />seeps. <br />2.04-49 &50 <br />Under the "Methane" section there is no mention about the quantity and surface impacts <br />associated with methane drainage wells. Please include a number of wells drilled in previously <br />mined areas as well as surface disturbance estimates, and if possible include an estimate for <br />MDWs needed for the South of Divide area. <br />Figure 15 (all) -Please add surface ownership to maps. <br />2.05-15 Operation Plan section <br />There is no mention of the methane drainage wells in this section. It seems that MDWs (and <br />their associated surface disturbances [roads, pads]) are significant features of the West Elk <br />Mine's surface facilities. Please include a general write-up (similar to other topics in this <br />section) describing the purpose and need for MDWs, typical construction method, site layout, <br />and well life. <br />2.05-23 & 24 <br />Please include a discussion about the use of "light-use" roads for methane drainage operations. <br />2.05-56 <br />In the seed mixtures discussion, please include the list of seed mixtures for the Paonia Ranger <br />District, agreed to by the Division and the FS per letter dated December 2, 2004. <br />2.05-97 <br />The sentence, "The area is generally open to off-road motorized use, as identified on the <br />`Gunnison Basin Area' Nation Forest Map," implies that the area around the West Elk Mine is <br />generally open to cross-country travel, when in fact the Gunnison National Forest prohibits <br />cross-country travel in motorized vehicles. Please reword this section appropriately. <br />2.05-166 <br />Please acknowledge that loss of bedrock springs would have translated effects to habitat and the <br />ecosystem <br />
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