2005-07-13_REVISION - M2000016 (23)

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~AFARGE NORTH AMERICA AGGREGATES, CdNCRETE & ASPHALT A copy of a separate response to these issues is enclosed; please see the attached memo. 4. Exhibit H -Wildlife Information and Exhibit C Mine Plan Maps a) A review ojthe mine plan maps shows a 200 foot setback from the mining limits to the South Platte River, but also shows dfst:rrbance boundaries which are much closer to the river, in some areas possibly as close as 20 to 30 feet, including the location of topsoil/overburden stockpiles. In the comment letter from the Colorado Division of Wildlife (DOW), dated January 21, 2005, it is stated, "In order to protect the riparian area and the diversity of large and small mammals, birds, and herptiles that inhabit the site, a 200'setback from the western shoreline of the river is recommended. It is also recommended to keep as many of the mature cottonwoods ar possible, and leave snags where feasible. "Please submit a plan to leave a 100 foot undisturbed riparian corridor between the disturbed area and the riverbank and describe haw this area will be protected from any accidental disturbance. Also describe what number (or areas) of mature cottonwoods will be protected and how they will be protected. It has been shown that groundwater dewaterfng can kill cottonwoods. Will the operator take measures to prevent the killing of cottonwoods through groundwater dewaterfng? If so, please describe these measures. The maps have been revised to reflect a 200-feet undisturbed riparian comdor between the disturbed area and the riverbank. Lafarge will use T-posts to stake the 200-feet offset to clearly define the limits of disturbance and to ensure protection of the riparian comdor. Lafarge will not directly disturb cottonwoods within the Z00-feet corridor and will use water from dewaterfng operations and perforated pipe to water the cottonwoods while the pit is dewatered. b) A copy of the January 21, 2005 DOW comment letter is enclosed. Please respond to their concerns regarding: i. Bald Eagle winter night roosts Lafarge is coordinating efforts with DOW representatives and wildlife consultants to identify the exact location of potential eagle roosts. Lafarge has met with both DOW and USFWS at the site; mitigation measures are being developed. ii. Perch buffers and leaving a portion of Prairie Dog ColonyA intact for a food supply for raptors Lafarge, DOW, USFWS met on site Friday, February 25, at which time the agencies consented to the removal of prairies dogs within the permit boundary, provided the removal occurs prior to April 1. LAFARGE NORTH AMERICA INC. -Aggregates, Concrete & Asphalt 10170 Church Ranch Way Suite 200, Westminster, Colorado 80021 Telephone: (303) 657-4000 Facsimile: (303) 657-4037