Laserfiche WebLink
DIVISION OF RECLAMATION, MINING AND SAFETY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 866 -3567 <br />FAX: (303) 832 -8106 <br />2/11/2011 <br />Marvin Moore <br />1570 Ranney <br />Craig, CO <br />81625 <br />EXHIBIT D -1 <br />RE: Moffat County proposed limestone operation, Rule 6.5(4) <br />Dear Mr. Moore: <br />(Blasting Rules) <br />STATE OF COLOIADO <br />COLORADO <br />D I V I S I O N O F <br />RECLAMATION <br />MINING <br />— &— <br />SAFETY <br />John W. Hickenlooper <br />Governor <br />Mike King <br />Executive Director <br />Loretta E. Pineda <br />Director <br />To follow up on conversations we have had regarding the requirements of the Construction Materials <br />Rule 6.5 (4) specific to the proposed limestone operation that will be operated by Moffat County, I have <br />determined a list of items that will need to be included within the Geotechnical Exhibit of your <br />application. The following list and enclosed documents are provided only as a courtesy in order to assist <br />you in compiling your application for the proposed site. Additional information may be required, as <br />determined during the review of materials submitted, with your application. <br />1. Identify all man -made structures within 1/2 mile of the blasting area (type of structure, age of <br />the structure, type of material the structure is constructed of, etc.). <br />2. Identify all potentially unstable geologic conditions within 200 feet of any structure (ie. highly <br />fractured cliffs, etc.). <br />3. Commit to complying with the maximum allowed peak particle velocity and the maximum <br />allowed airblast (air overpressure), which are 1.0 in. /sec. ppv and 129 dBL respectively. <br />Office of Office of <br />Mined Land Reclamation <br />Denver • Grand Junction • Durango Active and Inactive Mines <br />