2015-03-09_REVISION - M1983148 - Laserfiche WebLink

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6.4.4 EXHIBIT D — Mining Plan In addition to the mining plan map presented as Exhibit C -1, the following planned mining activities are proposed for the Neal Pit: (a) Clearing and Grubbing Phase — Prior to the mining of a new area of the quarry, the Operator (Montrose County) will clear existing vegetation from that area. (b) Earthmoving (topsoil stockpile) — After clearing and grubbing active mining area, the Operator will remove all available topsoil and stockpile in the area adjacent to the active mining area. That soils will be used as soon as practical to reclaim mined out areas of the existing portion of the Neal Pit (eastern side of the property) The stockpile will be surrounded by silt fence to prevent sediment from leaving the mining site as detailed in the Best Management Practices (BMP) in Exhibit E — Reclamation Plan. Those BMP's will remain in place until the stockpiles stabilize. The Operator plans on using a bulldozer to pile the topsoil and a front -end loader and truck to load and transport the topsoil to the designated stockpile location. Mining — Initially, the Operator will use a track hoe to excavate and a front -end loader to place gravel into 10 -wheel trucks for transportation to the crusher /screener location shown on the Mining Plan map. Gravel will be processed and stockpiled for use as needed. Additional or alternate equipment including, but not limited to, backhoes, mini - excavators, and bull dozers may be used at the Operator's discretion. (c) No water diversions or impoundments are planned for the site, however all existing drainages will be protected from offsite sediment migration by the BMP's presented in Exhibit E — Reclamation Plan. Groundwater is anticipated in the amended area as encountered in the current mining operations. Stormwater generally sheet flows into the center of the pit where it evaporates. No water is used in the processing of sand and gravel at the pit. (d) The Operator anticipates, and the Mining Plan presents, active mining throughout the project site as one phase to last the life of the mine. The proposed phase is presented on the Mining Plan (Exhibit C -1). Approximately one to five acres will be disturbed the first year of mining to establish the pit outline, and set up stockpiles for topsoil and backfill. Montrose County plans on beginning the mining of sand and gravel along the ridge to the west of the current affected area and progressing generally south to southeast in Phases 1 through 3 as detailed on the mining plan. Sand and gravel will removed in discrete layers of approximately 8 to 10 feet and mined at that level until proceeding lower in the pit profile. (e) The Operator (Montrose County) estimates that up to 100,000 tons of sand and gravel will be mined each year for thirty (30) years. The operator anticipates beginning mining operations in Spring 2015 and concluding operations in 2045, if Neal Pit — Permit Amendment Exhibit D