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Upper Gold Links Mine <br /> Permit M-2016-083 <br /> Amendment Application <br /> CRG Mining LLC <br /> Rule 6.3.3 - Exhibit C—Mining Plan <br /> The mining plan for this amended area consists solely in the careful placement of waste rock generated <br /> from the underground development of the permitted mine. This waste rock dump will be permanent, <br /> so it is important that the disposal site is prepared properly, and that waste rock placement is carried <br /> out carefully. The site is bounded by the existing permit area on the east, Halls Gulch Road on the north, <br /> public(USFS) land on the west, and patented claims on the hillside along the south. <br /> There will be no new underground openings or structures on the site. The only construction will involve <br /> the drainage and earthwork necessary to accommodate stormwater control. This includes earthen <br /> berms, buried pipes (underdrains), and sediment ponds. These features are considered important even <br /> though the gulch is dry and has only rarely been observed to flow. <br /> The gulch is sloped such that it drains toward the west, down to Gold Creek. The length of the <br /> ephemeral drainageway in the amended area is about 700 feet,with a 80-foot elevation change from <br /> end to end. The average gradient through the length of the drainageway in the amended area is about <br /> 11%. The operator plans to place the waste rock in level disposal "cells"that are arranged in steps along <br /> the length of the amended area;each step will be approximately 15 to 20 feet high. <br /> The footprint of the waste rock dump and other disturbances covers about half of the proposed <br /> amended area; areas of no proposed mining activity will not be disturbed. The waste rock will be placed <br /> down the middle of the gulch. The gulch in the amended area is forested and trees will have to be <br /> removed within the footprint of the waste rock. The waste rock placement will not extend very far up <br /> the hillside to the south of the drainageway, and the trees above the waste rock area will not be <br /> affected,other than the narrow area where the upland diversion berm will be constructed. <br /> Since the waste dump cells will be a series of level steps,the operator plans to strip any topsoil that can <br /> be practicably salvaged, stockpile it, and later replace it on the steps to be revegetated. <br /> Prior to waste rock placement, sediment and stormwater controls will be constructed. Stormwater is <br /> already controlled at the point where the upper end of the amended area adjoins the existing permit <br /> area. The ditch along Halls Gulch Road also acts as a stormwater runoff control, including several <br /> culverts routing the runoff into the gulch. Another runoff control that will be initially needed will be an <br /> earthen stormwater berm extending lengthwise along the southern hillside, designed to route hillside <br /> runoff to the sediment pond(s) be constructed on the waste dump. <br /> Before any significant disturbance in the amended area, a 24-inch diameter piped underdrain will be <br /> placed along the thalweg of the drainageway, with controlled inlet and outlet. Waste rock will cover the <br /> invert of the natural gulch drainageway. Therefore, the underdrain will be a permanent feature beneath <br /> all placed waste rock. The pipe will eventually extend the entire length of the amended area, but may <br />