2018-09-04_PERMIT FILE - C1980007 (17)

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Negative Results Report Cultural Resource Survey Mountain Coal's Sunset Trail Lease Modifications Permit Revision #PR -15 Gunnison County, Colorado Cultural resources that do not meet the 50 -year age criteria, but are integral parts of a historic district or carry exceptional importance to the history of the region are considered for eligibility under criterion consideration (g). Certain kinds of properties are not usually considered for listing in the NRHP: religious properties, moved properties, birthplaces and graves, cemeteries, reconstructed properties, commemorative properties, and properties achieving significance within the past fifty years" (U.S. Department of the Interior, National Park Service 1997). For a property to be eligible under a criteria consideration, the property must still qualify for one of the four criteria and must possess integrity. Regional contexts (e.g., Church et al. 2007; Gilmore et al. 1999) are used to evaluate significance under Criterion D by determining whether a potential property has the potential to answer defined research questions and/or date to a defined period of significance. Historical sites representative of the built environment (i.e., buildings, structures, and engineered features) typically qualify for listing in the NRHP under at least one of the first three criteria (A—C). Archaeological sites typically qualify exclusively under Criterion D, with notable exceptions. An otherwise heavily disturbed site may still retain information potential from intact features (potential chronometric or subsistence data) or discrete areas of the site that retain physical integrity. Archaeological sites with significant sediment deposition remain potentially eligible for listing in the NRHP even without evaluative testing. Sites evaluated as "needs data" may be eligible under one or more criteria but require further work to determine NRHP eligibility. Cultural resources recommended "needs data" include archaeological sites (either prehistoric or historical) suspected of containing buried cultural deposits or historical sites where additional research is necessary to ascertain significance. Sites that are evaluated as not eligible for listing in the NRHP do not meet any of the eligibility criteria and/or have lost physical integrity. Cultural resources are assessed for integrity only if the site meets one or more eligibility criteria. Eroded or otherwise heavily disturbed archaeological sites are typically not considered eligible since the ability to convey significance in the form of intact cultural deposits (i.e., information potential) has been lost through natural or modern disturbances. For a property to be eligible under one or more criteria, the property must possess physical integrity and retain most aspects of integrity: location, design, setting, materials, workmanship, feeling, and association. Most important of these for any building or structure are the aspects of location, design, materials and setting. Any building or structure that has been relocated/realigned no longer retains integrity of location, perhaps the most important aspect of integrity. The aspects of design and materials are important for demonstrating a building or structure's association with significant historical trends, and is required for a property to qualify under Criterion C. Considering most historical properties are still in use, a resource can retain integrity of design if materials have been maintained in- kind with the design of the original structure or building; for example, in-kind replacement of materials such as wood siding or railroad hardware would not diminish integrity of design. However, modern upgrades to earthen ditches such as the placement of modern diversion structures and concrete lining ERO Project #10145 10