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RULE 4 PERFORMANCE STANDARDS <br />4.03.1 Haul Roads <br />The construction, location, and maintenance of haul road "A" (4 mile roadway from pit area to Gossard <br />Loadout) and haul road `B" (1.4 mile roadway from Highway 13 to haul road "A") is discussed in the <br />existing permit document. These roads will continue to be used as part of the South Taylor/Lower Wilson <br />mining area. Refer to the existing permit document for details regarding these haul roads. <br />Roads that will be constructed in the actual mining areas will constantly change as the operation progresses. <br />The "in -pit" roads will be maintained by a motor grader and regularly wetted to minimize dust as required by <br />the air quality permit. Any drainage off the "in -pit" roads will be retained in the pit or diverted to the <br />drainage and sediment control structures located on Map 33B and in Exhibit 7, Hydrology. <br />Colowyo will maintain the haul roads throughout the life of the mine with repairs including blading, filling of <br />potholes, and replacement of road surface as necessary. Likewise, watering for dust control will be <br />implemented as necessary. Other information relevant to haul roads is provided in the existing permit. <br />4.03.2 Access Roads <br />Other than the Sturgeon Access Road, there will be no changes to existing access roads for the South Taylor <br />pit expansion. <br />The existing two -track Sturgeon Road will be upgraded to allow access for construction and for routine <br />monitoring and maintenance. Map 25B provides the road design information for Sturgeon Access Road. <br />The Sturgeon Access road cut/fill stabilization seed mix is as follows: <br />Western wheatgrass @ <br />Mountain Brome @ <br />Kentucky Bluegrass @ <br />Sanfoin @ <br />Total <br />4 Lbs PLS/Acre <br />4 Lbs PLS/Acre <br />2 Lbs PLS/Acre <br />2 Lbs PLS/Acre <br />12 Lbs PLS/Acre <br />Following construction, a report by a registered professional engineer shall be provided to the Division <br />indicating that the road has been built as designed. Following all mining activities, the road will remain in <br />place as a private ranch road and will not be reclaimed. Colowyo as the land owner has provided the Division <br />with a letter documenting this request. <br />4.03.3 Light -Use Roads <br />This section is discussed in Volume 1. There will be no changes to this section resulting from the South <br />Taylor pit. <br />4.04 SUPPORT FACILITIES <br />Please see Sections 2.05.3 and 4.04 in Volume 1. <br />South Taylor/Lower Wilson — Rule 4, Page 2 Revision Date: 4/7/17 <br />Revision No.: RN -07 <br />