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1% ~5~. <br />~~~~~~~~~~~~~~~~~~~ cx- 1~9-og <br />999 <br />Qa~ L~~~t~~ b~IQ~~ G~7i1~J•~~u~~ ~~'-~~0 Ua.1u~~Cru J ~5.~~ <br />July 26, 1983 <br />Susan Mowry <br />Mined Land Reclamation Division <br />Colorado Department of Natrual Resources <br />1313 Sherman Street <br />Denver, CO 80203 <br />Dear Susan: <br />1720 south Bellelre Street <br />Denvsr. 00 80222 <br />As agreed to during our meeting on 7uly 18, 1983, I am forwarding the Sandhill Crane <br />Monitoring Plan that PdcM will conduct during seismic and drilling programs this <br />summer and early fall of 1983. <br />Data compiled by the Colorado Division of Wildlife (D.O.W.) in the last few years have <br />shown that the sandhills will abandon the nest if disturbed during egg laying or <br />incubation. The D.O.W. currently stipulates that no exploration activity occur in the <br />area of nesting sandhills prior to June 1st annually. Unfortunately, there are no data on <br />Sandhill responses to exploration activities during brood rearing. <br />Because of this situation, PbcM has agreed to study the sandhills in the Twentymile Park <br />area. This study is designed to evaluate the responses of sandhills ~.vith young to seismic <br />and drilling activities. Information collected will be of considerable value to both the <br />MLRD and PdcM (as well as other companies) in future decision making where these <br />birds are involved. <br />PbcM has been monitoring three known nesting pairs of sandhills in the Twentymile Park <br />area since early May of this year. sandhills are known to have nested and raised young <br />in the area previously, but no data other than nest site locations have been collected. <br />This year's nest sites are shown on the attached map. All three pairs were successful in <br />bringing off young (one each}. However, one pair (in Sec. 17) subsequently lost their <br />young. As of last week, the other two pairs still had their young. The areas where the <br />adults with young have been observed are shown on the attached map. The two pairs of <br />birds with young have been observed only in those drainages where nesting occurred. <br />The pair that lost the young have been observed moving around the area more since that <br />time. <br />As indicated, PdcM will monitor the sandhills during seismic and exploration activities <br />this summer. Following is the monitoring plan PdcM proposes to follow in evaluating the <br />responses of these birds. <br />Gulf <br />L SURSi D~eRV OF OULi O•L CORPOR4TION <br />f¢[vnonu (303) ]5965:( <br />