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Grand Canyon National Park

2009/2010 Accomplishment Report

Division of Science and Resource Management Resource stewardship

Resource stewardship in 2009-10 included collaborative efforts with the Museum of Northern Arizona, Utah State University, and park-affiliated tribes on archeology projects related to the operation of Glen Canyon Dam. Six archeological sites received excavation/stabilization work. In addition, condition assessments were completed at 52 other sites along the Colorado River. Vanishing Treasures program staff assessed preservation needs for 32 structures at Desert View, including 14 granaries and 18 multi- room surface structures with standing architecture.

In addition to ongoing management and maintenance of the museum collection, staff cataloged 123,278 aquatic invertebrates from the first intensive analysis of macroinvertebrates collected from the Colorado River and its tributaries more than 20 years ago.

A major component of endangered species work was the translocation of 302 juvenile humpback chub to Shinumo Creek. Post-translocation monitoring has shown high growth rates in the fish, with approximately 70 percent of them staying in the creek.

Archeological site work on the Colorado River. NPS photo

External threats continue to be a concern for preservation of park resources. Staff provided support to the Environmental Protection Agency (EPA) for its determination of impacts from heavy-metals byproducts of power generation at both the Four Corners and Navajo power plants. This support helped EPA seek greater environmental protections at both locations.

In June 2010, more than 300 juvenile humpback chub were translocated to Shinumo Creek as part of a multi-year conservation experiment to establish a second spawning population of this endangered fish in Grand Canyon National Park. NPS photos


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