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III IIIIIIIIIIIIIIII ~ <br />DIVISION Of MINERALS AND GEOLOGY <br />De , rtmenl of Natural Resuuaes <br />I) I }Sherman St., Rnom 21 5 <br />Denver, Colorado 80103 <br />Phone 13m 718fih-SSfii <br />FAX: 17031 A 11~A I OL <br />October 28, 1997 <br />STATE OF COLORADO <br /> <br />Mr. Ray Patterson <br />Holnam, Inc. <br />3500 State Highway 130 <br />Florence, CO 81236 <br />RE: Letter of Complaint -Blasting, Portland Limestone Quarry, File No. M-77-334 <br />Dear Mr. Patterson: <br />~I~~~ <br />DEPARTMENT OF <br />NATURAL <br />RESOURCES <br />Roy Rnm¢r <br />Governor <br />lames 5 Lochhead <br />Execwne Director <br />Michael a. Long <br />Division Dvector <br />On October 23, 1997, the Division received a complaint letter from Norman and Lisa Bowie, of 1077 Fremont Avenue, <br />Penrose, Colorado (copy attached). The complaint is in regard to possible damage to their home from blasting at Portland <br />Quarry, and their concern that blazting at the quarry may cause damage to their home in the future. The Bowies have <br />recorded the dates and times that they felt quarry blazrs at their home. <br />[discussed this complain[ with Tracy Gunn by phone on October 22, 1997, hit. Gunn eXplained to me that every blast at <br />[he quarry is very well documented. He said that Holnam records the time and date of blase, the number of holes involved <br />with each blazt, the amount of powder used in each hole and seismic information on over 90% of blasts. I requested that <br />Holnam, Inc. send to the Division that information for the blast dates and times the Bowies have listed in their letter. If you <br />did not blast at or about [hese times, pleaze let us know. <br />We also request that you provide delay times between blast hole charges and the eXact type of each charge. Please provide <br />us the straight line distance to the Bowie's residence from the blast area, for these dates. Please also send any additional <br />information that you would like to provide. <br />We recommend that you contact the Bowies and request to make a survey of their home to record [he presence or absence <br />of [he types of damage that ground motions or air blasLS could possibly cause. We also recommend that you request their <br />permission to place seismic monitors at their home to record both ground motions and air blazts. <br />Please provide the requested information by November 14, 1997. <br />Please call if you have questions. <br />Sincerely, <br />Larry D. Oehler <br />Environmental Protection Specialist <br />enclosure <br />cc: Jim Stevens, DMG <br />Norman and Lisa Bowie <br />fl'OSS\PfIMTENPAI]].1+~ LDO <br /> <br />