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PERMFILE46933
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PERMFILE46933
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Entry Properties
Last modified
8/24/2016 10:49:01 PM
Creation date
11/20/2007 12:58:59 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007
IBM Index Class Name
Revision
Doc Date
12/2/2004
Doc Name
Adequacy Comment Responses to Divisions Letter of 7/6/04
From
Mountain Coal Company
To
DMG
Type & Sequence
PR10
Media Type
D
Archive
No
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Permit Revision Adequacy Comment Response <br />November 30, 2004 <br />Page 24 of 24 <br />• MCC Response: MCC has addressed the wells cun•ently being monitored and has just obtained <br />the one-year baseline data for the new wells installed South of the Divide. The information is <br />contained in the text. <br />Rule 4.24 Operations in Alluvial Valley Floors <br />120. Rules 4.24.4(1)(b) and (c) require implementation of a monitoring system to demonstrate that <br />the essential hydrologic functions of alluvial valley floors not within the permit area are <br />preserved during and after mining and that the operation is not causing material damage to <br />quantity or quality of water systems that supply identified alluvial valley floors. Rule 4.24.4(2) <br />requires that such monitoring be performed at adequate frequencies to indicate long term <br />trends. <br />For alluvial valley floors on the main stem and East Fork of Minnesota Creek, it would appear <br />that the only potential effect of mining would be to diminish the quantity of water supplied the <br />stream system, caused by dewatering associated with undermining of the Dry Fork, Lick Creek, <br />and the Deep Creek Ditch, and any other water supply ditches in the SOD permit extension <br />area. For alluvial valley floors on the North Fork of the Gunnison River, potential effects <br />would include water quality as well as water quantity impacts. <br />• Please include a summary of the hydrologic monitoring that will be conducted to comply with <br />the applicable requirements of Rule 4.24.4, within the Alluvial Valley Floor section of the <br />permit application, with reference to appropriate narrative sections of the permit application <br />and maps for more detailed information regarding the hydrologic monitoring plan. <br />MCC Response: MCC has updated the text to address AVFs. <br />• <br />
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