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Topsoil and Overburden <br />Topsoil and overburden will be stripped with scrapers or a dozer and placed in separate temporary <br />stockpiles within the permit area limits as required by Rule 3.1.9(1). All topsoil and overburden <br />stockpiles that are placed above the existing surface will be located outside of the floodway and, <br />when they are in the floodplain, be oriented parallel to the flow of water. These stockpiles will be <br />35 -40 feet tall with maximum 1.5:1 (horizontal:vertical) side slopes. Stockpiles that will be in place <br />for more than 180 days will be seeded depending on the seeding "window" parameters for dryland <br />grass, which are typically between September and April. The Dryland Grass Seed Mix is listed on <br />page E3 of Exhibit E. The stockpiles will be broadcast seeded and incorporated into the weed <br />control program. Weed control consists of monthly inspections and, if necessary, chemical <br />treatments in the applicable fall and spring seasons. <br />Commodities to be Mined <br />The primary commodity to be mined will be aggregate. Lafarge will supply local, county, and state <br />governments, as well as private industry with aggregate from this facility. Some gold may be <br />discovered on site during the mining process. If gold is found, it will be used for commercial <br />purposes. <br />Offsets <br />With the exception of a small wetland that was created by the property owner on the east edge of <br />the mining cell, Lafarge will stay out of wildlife and riparian vegetation areas along the Cache la <br />Poudre River. Lafarge is proposing to mine through this small created wetland area because when <br />dewatering occurs in conjunction with the mining operation, it would be difficult to keep water in <br />the wetland to support the wetland vegetation. Therefore, Lafarge will be working with the Corps <br />of Engineers regarding the regulatory requirements related to the impact area. The details regarding <br />any impacts will be worked out with the Corps of Engineers prior to the commencement of mining. <br />In addition, a mining setback from existing structures will be maintained according to the <br />Geotechnical Slope Analysis included in the Stability Exhibit. The highwall of the mine is set back <br />at least 50 feet from all existing manmade structures and a minimum of 100 -200 feet from the bank <br />of the Cache la Poudre River. The meandering nature of the Cache La Poudre River adjacent to this <br />site results in erosive headcutting on one bank of the river or the other. Where erosive headcutting <br />is on the pit side of the river, the mine will be set back 200 feet from the bank. Where the erosion <br />forces are predominately on the opposite bank of the river, erosion is much less of a concern and the <br />setback will be 100 feet from the top of bank. Inflow and outflow spillways will be installed in <br />conjunction with site reclamation to control the manner in which high river flows impact the site. <br />Use of these spillways is in accordance with the best practices per Urban Drainage and Flood <br />Control District (UDFCD) guidelines. When such spillways are used, the UDFCD typically permits <br />mining to within 200 feet of the river bank. <br />Roads and Conveyors <br />All of the material will be transported from the mining face to the 35 Avenue plant site for <br />processing via conveyors. The conveyor will leave the Iverson Mine cell at the southeast corner of <br />the Iverson property, cross the City of Greeley property on the north side of the Boyd and Freeman <br />Ditch then turn to head north along the east property boundary of the City of Greeley property. The <br />conveyor will cross the Poudre River Trail which is located on the City of Greeley property (per the <br />agreement with the City of Greeley, the conveyor will be elevated at least 14'6" over the trail) and <br />Iverson Mine <br />DRMS 112 Reclamation Permit Application <br />Page D3 of D4 <br />