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2005-10-24_REVISION - M1987028
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2005-10-24_REVISION - M1987028
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Last modified
6/15/2021 6:08:04 PM
Creation date
11/21/2007 6:11:37 PM
Metadata
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Template:
DRMS Permit Index
Permit No
M1987028
IBM Index Class Name
Revision
Doc Date
10/24/2005
Doc Name
Conv. Appl.
From
Colorado Marble L.L.C.
To
DMG
Type & Sequence
CN1
Media Type
D
Archive
No
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three foot high (minimum) rip-rapped berms on either side of the crossing roadway to <br />insure sepazation of Taylor Gulch drainage from mine drainage. <br />Within the active mining zone, roads will be limited to ramps and short term <br />(impermanent) switchback roads to various development levels that will change with <br />each season as pit development progresses to the north. Highwall development will be <br />gained from the southwestern end of the property with dozer trail installation along the <br />western edge of the affected land initiated from the southwest comer of the property. All <br />roads will be constructed at least 16 feet wide with `~" shaped ditches on either shoulder, <br />1.5 feet deep and 3 feet wide. All ditches will drain to the lower pit azea. A waste rock <br />berm will be constructed along the western side of Taylor Gulch to insure that Taylor <br />Gulch drainage is separate from mine drainage. This berm be will constructed of waste <br />rock materials with dimensions no less than 4 feet high, 10 feet wide at the base, and <br />capped with no less than 6 inches of topsoil, seeded and mulched. <br />Projection of Maaimum Disturbance <br />Presently, 20 acres of disturbed land exists at the site. While reclamation activities will <br />begin during 2005, disturbed lands vs. reclaimed land areas will continue to grow for the <br />next several seasons to facilitate highwall development and access to the mazble bed. It <br />is estimated that maximum disturbed Lands wilt total 35-40 acres by 2015, with <br />approximately 10 acres under reclamation. After that time period, additional acreage <br />mined and newly reclaimed land azeas will more or less equal each season until annual <br />reclaimed land areas are equal to or more than mined acreages during the last ten years of <br />life of mine. During the last flue years of life of mine, the operator will double the acres <br />of reclaimed land vs. acres mined, as permanent highwall reclamation and re-vegetation <br />work proceeds along the footwall zone of the greater portion of the western side of the <br />affected land azea. <br />Water Diversions <br />Water diversions will include shallow surface drainage diversions located above the <br />highwall bench system and topsoil stockpile azea on the west side of the affected land <br />azea. These diversions will be a "v" shaped ditch rnnn;ng pazallel to and down gradient <br />from the west boundary line of the affected land, app. 3 feet deep and no less than 10' <br />across with a more defined cut on the highwall side. The ditch will be installed to drain <br />surfacerun-off and seasonal drainage from abandoned mining pits and exploration sites <br />on slopes directly above the affected land boundary. The ditch will be installed at a 1 <br />grade to drain south towazds the southwestern corner of the affected land, then connect to <br />a diversion ditch directing surface flows to the lower pit location at the southwestern <br />corner of the presently disturbed area. Ditch systems of similar configuration will also be <br />installed at the toe of each highwall face run and topsoil pile on the upper bench system <br />to direct surface flows to the south to intercept the lower pit. <br />Other water diversions within the affected land boundaries include a berm constructed <br />along the west side of Taylor Gulch, pazalleling the drainage channel from the upper <br />
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