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I I I I I Wherever possible and appropriate, previously disturbed areas would be used for new or expanded areas of development. Ne:w facilities would be designed and located to blend naturally with the environment and would use principles developed for sustainable resource design. Vista site modifications may be used to improve views in this area. Visitors would be confined or directed to hardened sites, overlooks, boat ramps, and trails to confine and limit resource impacts. Significant soil and vegetation impacts occurring near high use sites could be mitigated through periodic closures, the use of natural materials to more clearly define use corridors, and increased enforcement techniques. Only native species would be used for revegetation. Landscaping with native species and natural materials, mowing (where appropriate), and selective removal and/or pruning of trees may also be done where appropriate or to enhance visitor safety. I I I I I I I I I I I I I I Cultural Resource Management. Resources or sites designated as significant cultural features or nominated to the National Register of Historic Places or included in the Curecanti National Archeological District will be preserved or restored depending on the degree of importance to the visitor's understanding of the purpose of the park or settlement and use of the region. All archeological sites would be protected from degradation. Facilities. Major developments are confined to this area. Existing and potential modifications might include visitor centers, surfaced parking lots, boat-launching facilities, transportation systems, limited service and campgrounds, maintenance facilities, administrative facilities, residential areas, water storage and sewage treatment facilities as well as various other support facilities. Maintenance. Maintenance activities could involve maintaining existing facilities (cleaning, painting, crack sealing, chip and sealing, striping, etc.), hardening sites, landscaping, providing for visitor convenience and comfort, protecting resources, irrigating, and restoring areas disturbed by human activities. Roads, buildings, signs, walks, interpretive displays, landscaping, and other facilities would be maintained on a regular basis. Power tools could be used for routine maintenance activities, and heavy equipment could be used for road and utility system repairs, development, and maintenance. This concludes the section for land-based prescriptions. Table 2 summarizes water- based prescriptions based on setting, experience, and activities. 57 002142