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<br /> <br />1 <br /> <br />L <br />1 <br /> <br />i 1 <br />Centennial Materials, Inc. Plains Sharp-Tailed Grouse Study <br />1.0 INTRODUCTION <br />Castle Rock Ouarry - e'-M <br />The Plains Sharp-tailed Grouse (Tympanuchus phasianellus) of the eastern slope has <br />continued to decrease in population size, as its habitat has been encroached by human land <br />use. Around the Castle Rock Quarry area, historical lek sites exist approximately 3.5 miles <br />to the southwest and 1.5 miles to the southeast. Historical sightings of the Sharp-tailed <br />Grouse have occurred in Sections 28 and 33 of the Castle Rock Quarry property. However, <br />these sightings are approximately 8 years old (Personal Correspondence, Mr. James Barrett, <br />Centennial Materials, Inc.). There is concern that this grouse subspecies will continue to <br />decrease in population size as land use patterns change. <br />The purpose of the present survey was to evaluate the potential for the presence of the Sharp- <br />tailed Grouse within the Castle Rock Quarry property. This was accomplished by conducting <br />a field survey consisting of three activities: <br />1. Identification of potential lek sites, <br />2. Ground survey of potential lek sites for displaying grouse or grouse sign, and <br />1 <br /> <br />I <br />1 <br />t <br />1 <br />1 <br />3. Field survey with the use of binoculars znd Bionic Ear and Booster to observe <br />and/or record Sharp-tailed Grouse calls or display sounds. <br />McClain Pit -American Geological Services. Inc. <br />American Geological Services, Inc. was contracted by Centennial Materials, Inc. to conduct <br />a Plains Sharp-tailed Grouse survey of the McClain Pit at Franktown, Colorado. This survey <br />was conducted following [he guidelines set forth in the Colorado DOW memo of February 9, <br />1993 from Dave Weber to the Mined Land Reclamation Division, and subsequent phone <br />conversations and meeting with Mr. Weber. <br />The objectives of this investigation were to determine if Plains Sharp-tailed Grouse are using <br />the area in and around the McClain Pit for breeding grounds. If breeding grouse were <br />observed, the DOW was to be immediately notified. The survey was conducted during the <br />period of April 1 through May 15, 1993. <br />en~jneering-environmental Management, Inc. 1 7uly 12, 1995 <br /> <br />