BLM AK Alaska Mined Watershed Assessment Restoration and Outreach

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Hundreds of watersheds across Alaska have been mined in the past or are currently being mined or proposed for future mining. Stream reclamation restoration in Alaska is complex and has often failed to achieve stability goals within 10 years post construction. The protracted recovery periods and limited success are due in large part to the absence of baseline data needed for channel design and an over reliance on natural processes to facilitate recovery of disturbed streams. To enhance the probability of restoration success, baseline data on stream function and stream functional lift potential need to be gathered. In addition, regional hydraulic geometry curves need to be developed for Alaska�s mining districts. Coupled with site specific baseline geomorphic data, this information can greatly enhance stream restoration success and the rehabilitation of fish and wildlife habitat. The testing and adoption of proven stream design techniques, such as Rosgen�s Natural Channel Design, in Alaska is also essential to developing an effective approach to improving conditions with watersheds degraded by historic or ongoing placer mining.

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