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V <br /> RECEIVED <br /> CRG Mining LLC <br /> 510 S. Wisconsin St. MAR 0 6 2020 <br /> Gunnison, CO 81230 <br /> March 4, 2020 DIVISION OF RECLAMATION <br /> MININGAND SAFETY <br /> Dustin Czapla *SmR,l <br /> Division of Reclamation, Mining and Safety <br /> 1313 Sherman St., Room 215 <br /> Denver, CO 80203 <br /> Re: Carter Mine, File M-2020-014, 110(2) Permit Application,Adequacy Responses <br /> Dear Mr. Czapla, <br /> We are responding to your adequacy review letter, dated February 24, 2020,for the above-named <br /> permit application. The numbered items below refer to the respective items contained in your letter. <br /> 1. The latitude and longitude coordinates for each mining area are shown on the attached "Site <br /> Locations" list. <br /> 2. CRG has seven quarters of WQ analysis reports. We will send the required water sample <br /> analyses separately in electronic form, due to the volume of data. <br /> 3. During the life of the mine,water quality monitoring will be carried out quarterly, as it has been <br /> done by us for the last seven quarters. The analytes are listed on the "WQ Analytes" <br /> attachment. We also commit to continue to carry out the sampling as required, and submit the <br /> results with our annual reports. When sufficient baseline has been established to determine <br /> trends, we will discuss with DRMS possible reduction in required analytical testing and/or <br /> testing frequency. <br /> 4. We do not have analysis of the rock yet. Though the site is currently under snow, it is accessible <br /> and we will take representative samples in the next few days and send them to be analyzed. <br /> Tests will consist of SPLP (synthetic precipitation leaching procedure) and ABA (acid-base <br /> accounting). Upon receiving results,they will be forwarded to you promptly. Since the country <br /> rock in this area is extensive and uniform, only one sample will be collected. Please see the <br /> attached "Gold Brick Mining District Geology Map" file showing the area's lithology. (The area <br /> subject to this application is north of Ohio City on Gold Creek, and eastward up Jones Gulch.) <br /> The rock types in the zone of our proposed operation are identified as"biotite granite, common <br /> types" and "mainly gneisses and schists with a small quantity of quartzite." These descriptions <br /> support our statement that the rock is benign and uniform. <br /> 5. Constructed dimensions of the underground openings(in feet) are as follows: <br /> Carter Portal 7x7; Volunteer Shaft 10x10; Golden Islet Portal 7x6; and Farley Portal 7x6. <br /> These openings are currently all caved shut (unless we have temporarily reopened any of them <br /> under our approved NOI P-2019-011). Our mining plan is to install steel and timber sets at all <br /> openings. MSHA requires us to securely construct the openings one steel/timber set at a time <br /> as we go in, e.g., every few feet. Therefore, at any point prior to fully constructing and installing <br /> the sets and establishing a secure entryway, re-closure of an uncompleted opening can be <br /> carried out by simply backfilling the adit or shaft with the mucked-out material, and <br /> recontouring the surface. Once the structures and openings are completed, any remaining <br />