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2016-08-08_PERMIT FILE - C1981019A (14)
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2016-08-08_PERMIT FILE - C1981019A (14)
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Last modified
12/12/2016 1:14:30 PM
Creation date
10/5/2016 9:18:58 AM
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Template:
DRMS Permit Index
Permit No
C1981019A
IBM Index Class Name
Permit File
Doc Date
8/8/2016
Doc Name
Performance Standards
Section_Exhibit Name
Volume 15 Rule 4
Media Type
D
Archive
Yes
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RULE 4 PERFORMANCE STANDARDS <br />access roads be requested to remain post -mining, the applicable surface owner and Colowyo will provide <br />the Division with a letter documenting this request at the appropriate time. <br />4.03.3 Light -Use Roads <br />Light roads may be used in portions of the Collom permit expansion area. Typically, these roads are <br />existing ranch or two track roads that were exisiting prior to the development of the Collom operation. <br />Construction and maintenance of these roads are discussed in the Volume 1, Section 4.03.3. <br />4.04 SUPPORT FACILITIES <br />The original support facilities used at the mining operation, including the office, shop and warehouse <br />complex, and the coal handling and loadout facilities may continue to serve as minor support facilities for <br />this expansion and are shown within the original Colowyo Permit Map 21 and Map 22, Volume 8. Many <br />of the support structures were constructed at the mine start-up in 1976-1977. The complete discussion on <br />all the original support facilities is found under Sections 2.05.3 and 4.04 in Volume 1. <br />The Collom area facilities will include an administration building, shop and warehouse facility, coal <br />crushing, explosives bunker, sedimentation ponds, utility lines, water lines, and haul roads that will be <br />constructed near the Collom Lite pit area. These facilities are detailed in the Structure and Facilities Map <br />2213. <br />4.05 HYDROLOGIC BALANCE <br />4.05.1 General Requirements <br />Please see Section 4.05.1 in Volume 1. <br />In addition to the mining, reclamation, and treatment methods referenced in this section, further <br />protection of the hydrologic balance will be established by an on-going plan for monitoring potential <br />changes in surface water quality and quantity and valley fill groundwater quality. This monitoring plan is <br />described under Section 4.05.13 and the monitoring locations are graphically shown on Map 1013. <br />4.05.2 Water Quality Standards and Effluent Limitations <br />Please see Section 4.05.2 in Volume 1. <br />4.05.3 Diversions and Conveyance of a Watershed Less than One Square Mile <br />The drainage and sediment control measures described under Section 2.05.6 and presented in the Erosion <br />and Sedimentation Control Plan will provide for clean water diversion of surface drainages within the <br />Collom Pit area, as needed for mine operations (please see Exhibit 7, Item 23, Part A) . A system of <br />clean water diversion ditches upslope from the mining activities will be constructed to divert surface <br />runoff away from the disturbed areas (Collom Pit). These temporary diversions will be constructed to <br />pass at a minimum the runoff from the precipitation event with a two-year recurrence interval. <br />Any topsoil stockpile areas that may be constructed outside the confines of engineered sediment control <br />structures will be required to have a perimeter ditch and berm constructed around the entire footprint of <br />the stockpile sufficient to capture and retain any rainwater/snowmelt that may be generated from the <br />stockpile area to preclude loss and/or contamination of the topsoil resource. A demonstration of the <br />Collom — Rule 4, Page 3 Revision Date: 4/18/16 <br />Revision No.: PR -04 <br />
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