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SttYiaz ~ 2.04.4 Substation No. 3 was constructed in an area that has been previously surveyed (Grand River Institute, • March 1992) for cultural resources. The declaration of negative findings contained in Exhibit 2.04-E2 presents areas that have been previously surveyed. None of the previously surveyed areas contained any sites that were considered eligible for listing on the National Register of Historic Places. During fall 1995, in preparation for permitting of the West Valley Fill coal refuse and mine development waste disposal area and associated haul road, Grand River Institute conduced a cultural resource survey of the area west of the Somerset Cemetery. The survey and resulting report dated November 8, 1995 cover an area of approximately 40 acres in T13S, R90W, Sections 7 and 8. The survey resulted in two isolated finds of stone artifacts utilized for floral processing. Survey results are included in Exhibit 2.04-E2. As part of a proposed 160-acre lease modification and the associated Permit Revision Number 3, a file search of the Colorado Inventory of Cultural Resources and a cultural resource inventory were completed. The cultural resource inventory, conducted by Grand River Institute, resulted in a Negative Declaration of Findings as documented by the August 30, 1996 report included in Exhibit 2.04-E2. Recognizing that activities associated with development of the West Valley Fill and associated haul road could be of concern re]ative to the Somerset Cemetery, Oxbow in October 1996 requested information from the Colorado Historical Society relative to the cemetery's historical importance and any necessary measures to protect the cemetery during constnrction. The Colorado Hatorical Society's response dated October 16, 1996 indicated no effect to historical properties and provided guidance relative to praedures to follow in the unlikely event that an unmarked human grave is encountered during construction. Both the initial information request and the resulting response are included in Exhibit 2.04-E2. • As part of the Elk Creek lease application and in conjunction with this Permit Revision PR-04, a file search of the Colorado Inventory of Giltural Resources was completed. Three sites were identified in the lease area including the Somerset Town and Cemetery, which has been determined as ineligible as discussed above under the March 1980 investigations, and the two isolated finds identified in the fall 1995 survey, as discussed above. Documentation of the file search u included in Exhibit 2.04-E2. Paleontoloeical Resources None of the file searches, site investigations, or actual site disturbance activities have resulted in identification of any paleontological resources within the mine permit area. 2.04.5 -General Description of Hydrology and Geology The following section describes the general geologic and hydrologic environment in vicinity of the mine permit area as a basis for understanding site-specific geologic and hydrologic conditions in the permit and adjacent areas and evaluation of potential mirtirig-related impacts and development of any appropriate plans for conservation of resources and mitigation or restoration of the hydrologic balance. Consistent with applicable regulatory requirements, the informauon presented in this settion and Sections 2.04.6, Geologic Description, and 2.04.7, Hydrologic Information, address regional conditions (General Area), the mine permit and adjacent areas, and actual minuig disturbance or mine plan areas. This section specifically addresses the "General Area" with regard to geology and hydrology The information presented in this section is based on research of available published reports and documents; contacts with Federal, State, and local agencies; site-specific investigations; and ongoing monitoring activities. u PR04 2.04-6 Revised August 2000