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I .~ P.O. Box 1365, Boulder, Colorado 80306 (303) 442-3120 January 26, 19s~ JAN 281981 Mr. Jim McArdle MINED LAND Division of Mine Land Reclamation RFr~ °MATIDN~I~/IS~QN 1313 Sheermen Street - -- -_ Denver, Colorado 80203 ~i,• ttj Dear Jim: 1~•~'ZO~ M' As per our phone conversation this morning, the following is a description of the activity of the cement plant north of my home, near Lyons, Colorado. We have lived in the .home (10810 North 49th Street, Longmont, Colorado) for five years. We are approximately 1'~ miles south of the cement plant, formally op- erated by Martin Marietta. Last year, after the switch in ownership of the plant, we noticed some changes in their activity. Explosions are more frequent than they had been, but that is not our problem. At issue is the intensity of the blasts. Approximately, in mid January two explosions rocked our home, with the ground shaking for over half a minute. (We are 1~ miles away!) We can not be sure of the frequency of these intense blasts, as we are not always at home. A second concern is the population of Bald Eagles wintering very close to this plant. At the blast last week, my husband witnessed the eagles (nine at the time) being blasted out of two trees about '~ mile south of the plant. This population of eagles has increased every winter since we have been observing them. This kind of activity is obviously detrimental to these birds. Our third and last concern is the apparent increase in night time activity of the plant. I realize that this may be out of your jurisdiction, but I think it is important for the record. Night time noise and smoke exhaust has increased drama- tically. The noise in the past was inaudible but now it seems to roar some nights between 11:00 and 6:00 a.m. I appreciate any response and feedback on this matter. Enclosed please find a sketch of our neighborhood. Si cerely, /cy A. Da~~ 10810 North 49th Street Longmont, Colorado Moving and Storage Since 1912