2014-08-01_PERMIT FILE - M2014043 (4)

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EXHIBIT D MINING PLAN AND TIMETABLE LOCATION The property is located in Adams County approximately 3 . 8 miles southeast of Thornton, Colorado. The land to the west is part of an old gravel pit operated by Aggregate Industries which is currently a water storage reservoir for the City of Thornton. The land to the north was mined and partially backfilled with inert material , to the east is developed commercial land and Interstate 76 . The southern side is located along East 88th Ave . with commercial uses across the road. In the southwest corner the mine adjoins a Colorado Division of Parks and Wildlife complex that includes a service dog training facility. Please refer to EXHIBITB -VICINITY MAP for the property configuration and the relationship to surrounding geological features . CURRENT CONDITIONS The permit area will cover a 53 . 17 acre ± parcel with a site elevation of approximately 5100 feet, sea level datum. This area has 4 distinct land types that have been developed over the years . The upper terrace (level area) ; the lower terrace and hillside, the old gravel mine (Pre-Law) and the old fish hatchery area. The northwest portion (old gravel mine) was mined in the late 1960 ' s and two small sand piles were left along the north side of the lake that resulted. South of the old mine area is the remains of an old DOW fish hatchery, an equipment parking area, an old shop building and sheds . This area has been highly disturbed in the past . East of the old mine area (lower terrace) is where the original owners used for rural residential and general farm yard uses and included, a house, a garage and yard area. It also includes the exposed gravel escarpment that is a transition zone from the upper terrace to the lower level . The upper terrace along the east portion of the permit area has had may uses over they years . Many of them detrimental to the land and included uses as a pasture for buffalo and other livestock. The most recent being a sod farm that has virtually removed any topsoil that was on the mine but there is a layer of overburden that can be salvaged and used at growth medium. We estimate there will be enough to respread 8 to 12 inches on the areas needing seeding. The lower terrace around the house also has a 2 to 3 foot deep layer of material that will be salvaged and used for growth medium. Topsoil salvaged from Stage 2 will be placed along the east and south sides of the stage creating berms that will limit visibility into the mine . 3