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HISTORY October 5, 2011 `� ric C. Scott Environmental Protection Specialist Division of Reclamation, Mining and Safety 1313 Sherman Street, Rm. 215 Denver, CO 80203 Re: L.G. Everist, Inc., Carr Gravel Resource, Permit No. M- 1988 -048) (CHS #60421) Dear Mr. Scott: " CD M 61 L )9Z Thank you for your correspondence dated September 21, 2011 (received by our office on September 22, 2011) and the additional information relayed during our October 3, 2011 telephone conversation regarding the subject project. Should human remains be discovered during resource extraction activities the requirements under State law CRS 24 -80 part 13 apply and must be followed. A search of the Colorado Cultural Resource Inventory database indicates that two cultural resources (sites 5WL276 and 5WL339) are located within the permit area adjacent to Lone Tree Creek. These sites while never receiving an official determination of eligibility for the National Register of Historic Places (NRHP) may possess a high- degree of integrity, have the potential for associated buried cultural deposits, possess interpretable data related to intra -site spatial layout, and are a type of resource increasingly threatened by development activities along the Front Range of Colorado. As such, we recommend that ground- disturbing activities associated with the project avoid both site locations. If site avoidance is not possible, we recommend further consultation with our office in order to identify options to avoid, minimize, or mitigate the adverse effect to these resources. Please be aware that our files contain incomplete information for this area, as most of Colorado has not . yet been inventoried for cultural resources. As a result, there is the possibility that as yet unidentified cultural resources exist within the proposed project area. If you wish to conduct a cultural resources inventory, this survey should be performed by a qualified professional to determine whether additional historic properties are present which may be affected by the undertaking. Our office feels that the area immediately adjacent the Lone Tree Creek drainage basin represents the most culturally sensitive portion of the permit area likely to contain additional unrecorded resources. A list of consultants qualified to perform such an inventory is available on our website at: http: / /www.historycolorado.org/ sites /default /files /files /OAI-IP /crforms edumat /pdfs /1502.pdf. HISTORY COLORADO CENTER 1200 BROADWAY DENVER CO 80203