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COOLEY RESERVOII2 AND FULTON WILDLIFE AREA PIT <br />AMENDMENT NO. I - JERONIMUS PROPERTY <br />(Revised 06/03) <br />EXHIBIT D -MINING PLAN (Continued) <br />The property was previously mined for sand and gravel resources by others. The property's present <br />configuration is two lakes and wetlands encompassing 28+ acres on the west, north, and south sides <br />of the property, and 20+ acres of non-lake azea vegetated with non-irrigated grasses along the east <br />side. Most ofthe lake area is within 100 year flood plain of the S.Platte River, but the non-irrigated <br />grass vegetation area is out of the flood plain. None of the flood plain area is considered part of the <br />flood way of the S. Platte River flood plain. <br />The addition of this property was primarily to obtain an area to dispose of the wash plant's discharge <br />water, as there are less than 500,000 tons to a depth of 30±' of available sand and gravel resources <br />on the property since it was mined previously. The stratum below the gravel resources is sandstone <br />interbedded with shale and siltstone bedrock. Mining will be one phase, and should be completed <br />within 2 years. Except for minor encroachment, the existing 10± acres of extensive wetlands area <br />along southern boundary of the south lake azea shall be preserved. Reclamation shall include creation <br />of additional wetlands area by filling of lake area to 6" with silt from the plant's wash water above <br />the existing high water lake elevation, which generally occurs in the mid-June to mid-July time period, <br />with silt from the wash plant water. This filling will both allow the establishment of wetlands, and <br />also will ensure there is no adverse affect on the S. Platte River flood plain. <br />Mining of the two lakes areas will be undertaken with a dragline and/or large backhoe to recover any <br />remaining resources below the water level. The proposed mining includes partially de-watering of the <br />two lakes to maximum dept of 15', but no dewatering or the additional exposure of additional water <br />surface shall occur until after required approvals are obtained. Scrapers, dozers, backhoes, and <br />similar equipment will be utilized for mining of dewatered areas and other areas above the water level. <br />Mining will also include the below elements, not necessarily in the order listed, with some of these <br />activities will occur concurrently: <br />1. Repair existing fencing and new fencing installation. Any new fencing will be accordance <br />with Adams County regulations, and where applicable permits for fencing shall be obtained. <br />2. Prior to earthmoving activities eradication of all noxious plants, and continue to follow the <br />"Noxious Weed Control Plan" in the original permit and copied as page 9 in this exhibit. <br />2 <br />