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/~ PLANNING DEPARTMENT 970-668-4200 Fax 970-668-0225 JUL 2 5 2007 July 24, 2007 Division ota d S2f01y4n, Mining Erica Crosby Division of Reclamation, Mining and Safety Post Office Box 5660 0037 SCR 1005, Peak One Dr. Frisco, Colorado 80443 1313 Sherman St., Room 215 Denver, CO 80203 / Y - --- Re: Recommended Release of Water Quality Monitoring under Mining Permit - M-1993-Oy35 Dear Ms. Crosby: Summit County has been asked to reevaluate the need for water quality monitoring associated with mining permit M-1993-093. In 1993, Summit County was provided with an opportunity to review and comment on a mining reclamation permit application submitted by Alpine Rock, Inc. for aggregate mining activities in the Swan River drainage basin.. One of the comments made by the County at that time was a recommendation that the Division include _a condition to the permit that required the monitoring of water quality. Upon further evaluation of the activities associated with mining permit M-1993-035, Summit County recommends that the condition requiring water quality monitoring be removed from the list of conditions associated with the reclamation permit. Several factors were considered in reaching this recommendation including: ° 1. At the time the original permit was being considered, the County did not have adequate resources to study the specific location of aggregate mining relative to potential sources of contamination. Based on the Targeted Brownfields Assessment of the Royal Tiger Mine and Miil Site, completed by CDPHE, aggregate mining activities do not appear to be a significant source of water quality concern. 2. At the time the original permit was being considered, the County was seeking assurance that dredge material would not be a source of contamination. The quality of the dredge material is now better understood and is unlikely to be a substantial source of contamination. 3. The County has received no complaints, nor has been required to take any action, relative to the above referenced permit. 4. The County is part of a venture to improve water quality in the Swan River. This project is being undertaken under the auspices of EPA authority and specific guidance of a Voluntary Clean Up Plan (VCUP). The VCUP has outlines specific measures to address water quality which are currently being constructed. The VCUP measures are designed to address the most relevant sources of water quality concern (e.g., former underground mines, tailings and mill sites).