APPCOR10873 - Laserfiche WebLink

Home Browse Search

Mr. William T. Davis - 9 - April 25, 1989 If, as may happen, certain of the underground workings encountered are flooded or water bearing, then the requirements for their sealing must satisfy the requirements of Rule 4.07.1. How these requirements will be satisfied in such an event must be specified. Rule 2.05.5 Post-mining land use is stated to be agricultural rangeland. Since the area is also utilized by wildlife, including winter range for big game, post-mining land use should include wildlife habitat. Rule 2.05.6(3) Since the SOAP study was completed, certain changes have been proposed in the mine plan, and additional probable hydrologic consequences of the mining have been identified. The applicant now proposes to mine the channel of Engleville Gulch; the probable hydrologic consequences of this and mitigation should be discussed. The proposed mining may intercept flooded or water bearing workings, particularly during Phase 2. T.he applicant should address the probable hydrologic consequences of this and mitigation. The rights of the present user of the EMD discharge, which may be eliminated by mining, should be covered as well as any need for an alternative source. Provisions for control of surface water and sediment while mining in the channel of Engleville Gulch should be described and justified. Drainage control for the roads must be described in greater detail and illustrated on the appropriate map. A 5pi11 Prevention Control and Countermeasure plan should be provided. The size of the culvert proposed to carry the flow from the west internal drainage control ditch across Engleville Gulch to the east ditch and ultimately to the sediment pond should be provided with design calculations. The site maps are not sufficient to determine the facility locations relative to flood flow boundaries. The locations of topsoil piles, the sediment pond, and interior drainage control ditches should be demonstrated as not allowing these elements to be subject to flood damage. There is no description of a proposed ground and surface water monitoring plan as required by Rule 2.05.6(3)(b)(iii). le 2.05,6(5 The application has two narratives provided for this section. The applicant should indicate which he desires to submit.