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GENERAL30336
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Last modified
8/24/2016 7:47:54 PM
Creation date
11/22/2007 10:11:59 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980004
IBM Index Class Name
General Documents
Doc Date
5/13/2002
Doc Name
MINE PLAN DECISION LETTER TO NEPA COMPLIANCE DOC
Permit Index Doc Type
Other Permits
Media Type
D
Archive
No
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• <br />acreage amounts to less than two-tenths of a percent of the area contained <br />within the hunger Canyon Drainage (5,085 acres), and one one-hundreth of a <br />percent of the total drainage area of East Salt Creek above the confluence <br />with Hunger Canyon (67,228 acres). Both Hunger and HcClane Canyons (42.7 <br />acres) will only affect six-hundreths of a percent of the drainage area of <br />East Salt Creek. <br />As -indicated-cumulative-impac-t-on-flow-in~6ast-Salt-Creek as a result of the <br />operations at McClane and hunger Canyons will be relatively insignificant. <br />All flows occurring outside of the disturbances will be routed around them and <br />returned to the drainage. Runoff produced from the disturbed areas will be <br />contained in sedimentation ponds for a sufficient enough time to meet NPDES <br />and Alined Land Reclamation effluent standards, and will then be released into <br />the drainage. <br />For the same reasons water quality in East Salt Creek will be minimally af- <br />fected. Because the surface disturbance will consist primarily of road and <br />portal development most of the impact wLll consist of an increase_in suspended <br />sediment concentrations. .The sedimentation.ponds are designed. to reduce the <br />sediment concentration to acceptable levels before release into the streams. <br />The Munger Canyon operation will mine [he same coal zone as the~McClane Canyon <br />mine. For the first permit term the Munger operation when reopened will aot <br />advance into the zone of saturation that is projected by the applicant on <br />~ drilling information. Neither mine is expected to have a significant impact <br />on ground water during the first permit term. There will be no cumulative ef- <br />fect on any aquifers of regional extent as a result of mining at these loco- <br />- tion. <br />The projected d_evelopme_nt of the_A1cClane Canyon and Hunger Canyon Hine work- <br />ings indicates further impact on ground and. surface water in the future. ,Hun- <br />ger Creek, Buniger Canyon, Stove Cattyon and a portion of the East Salt Creek <br />valley floor will be undermined. Prior to issuance of a permit to mine into <br />these areas it will be necessary to determine the absence or presence of AVF's <br />in these canyons, and ,to~predict_:tbe, effect pf,_mining on, any AVF!s identi-_ <br />fled. These determinations will occur in future permit applications. ' <br />Mining will progress into the projected saturated zone of the coal seam in <br />future permit terms. The recharge area of the Cameo seam at East Salt Creek <br />will also be impacted. In subsequent permits, geologic and alluvial monitor- <br />ing sites will have to be established to adequately monitor the effects of <br />mining on geologic and alluvial ground water quantity and quality. <br />After mining is completed, all portals will be sealed and disturbances will be <br />backfilled, graded, topsoiled and re vegetate d. In this reclaimed situation <br />the hydro log lc characteristics of [he disturbed areas will be restored to <br />nearly pre-Wining conditions. <br />• The assessment of the probable cumulative <br />ing Sn the general area on the hydrologic impacts of <br />balance has all anticipated coal min- <br />been made by C?f[RD, and <br /> OS`t and the operations proposed under the application have been designed to <br /> prevent da3a~e to the hydrologic balance outside the proposed perm Lt area, <br />
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