2024-03-28_REVISION - M2015030 (2)

Home Browse Search

Chavers Mining Resource DRMS Permit No.M-2015-030 Amendment No.2(AM-02) March 2024 Page 5 mining operation is estimated to last for another 6 to 8 years; however, this could vary depending upon market conditions. The current excavation is shown on Exhibit C-2. The extents of excavation for the northern half of the Site have been reached. Current excavation areas within 400 feet of the South Platte River will be backfilled within one(1) year of approval of AM-02. As shown on Exhibit C-3, backfill of the pit will occur on the northern portion of the Site while the anticipated general direction of mining will occur on the southern half of the Site. Future mining excavations within 400 feet of the South Platte River will be backfilled within one (1) year of excavation. 6.4.4 (F) STRATIGRAPHY 6.4.4 (F)(i) Nature of Deposit The average overburden thickness is approximately 3.5 to 4.0 ft. The topsoil portion of the overburden typically ranges from 12 to 24-inches in depth. The sand and gravel deposit varies in thickness,but the average thickness is approximately 28 feet. It varies from sandy lean clay in the upper zones, to coarse clayey sand and sand with gravel nearer the bedrock. The gravel typically found in this area has a history for being processed into high-quality aggregate construction materials including concrete and asphalt. 6.4.4 (F)(ii) Nature of Stratum beneath Deposit The strata underlying the sand and gravel deposit is a claystone bedrock. 6.4.4 (G) COMMODITIES MINED/EXTRACTED AND INTENDED USE The primary commodity is sand and gravel to be used for the construction industry. 6.4.4 (H) INCIDENTAL PRODUCTS MINED/EXTRACTED AND INTENDED USE There are no incidental commodities. 6.4.4 (I) EXPLOSIVES No explosives will be used for the mining operation. 6.4.4 (J) DIMENSIONS OF EXISTING OR PROPOSED ROADS No existing or proposed roads are associated with the mining operation.