2020-02-07_PERMIT FILE - M2020007 (2)

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EXHIBIT D MINING PLAN (conT) the road will be retained on-site and allowed to soak into the ground or evaporate . The road will be maintained as needed. Maintenance roads will be built around each reservoir to provide access for the owners . The access roads will remain when reclama- tion ends as they will be used to access the property. GEOLOGIC SETTING The affected lands are located along the South Platte River in a Quaternary age, Piney Creek alluvial deposit . The eastward dipping beds of upper Cretaceous age are overlain at an angular unconformity, by the Piney Creek alluvium. The sand and gravel encountered in the Piney Creek alluvium are a result of water erosion and redeposition of rock materials from the Front Range of the Rocky Mountains . The deposition of this material occurred during a time when the river was much larger than it is now. But, judging from the scarcity of large rocks found at the location, the velocity of the river must have slowed sufficiently to have dropped boulders and most large cobble before it reached this point . This type of material is typically found from south of Denver to the Colorado state line along the South Platte River. The thickness of the mineral deposit varies from 8 to 52+ feet and the average depth on this mine is approximately 40 feet deep. This site has a zero to 10 inch layer of topsoil , consisting of loam and zero to 36 inches of a clay loam to sandy clay loam overburden that overlays the gravel . This alluvium is a well-sorted coarse gravel, sand and silt, predominantly granitic and quartzite material with minor amounts of gneiss, schist and sandstone . The bedrock under the surface gravel is a grey to grey black shale that is impervious . SOILS AND O VERB URDEN The SOILS MAP IN EXHIBIT I, shows the soil types as delineated by the National Resource Conservation Service (NRCS) and obtained from their website . The information contained in EXHIBIT I/J will provide background levels for the site as reclamation begins on the entire area. The depths of the topsoil and overburden, shown in the following table were obtained from drill logs provided by the Cannon Land Company. There are eleven (11) types of soils found on the site . These soils are typically found throughout Weld County. They have no unusual qualities . The eleven types of natural soils on the site as determined by the Natural Resource Conservation Service and shown in the report are designated as map Units 1, 2 , 3 , 10, 16, 21, 22 , L.G. Everist, Inc. Ragsdale Reservoirs February 6,2020 6