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Title: Final Environmental Assessment : Albeni Falls Dam, Clark Fork Drift Facility, 10-Year Maintenance and Repair, Oldtown, Idaho
Authors: United States. Army. Corps of Engineers. Seattle District
Keywords: Albeni Falls Dam (Idaho)
Clark Fork River (Idaho)
Environmental protection
Environmental management
Publisher: United States. Army. Corps of Engineers. Seattle District.
Abstract: The Clark Fork Drift Facility is located approximately 45 river miles upstream of Albeni Falls Dam, near Clark Fork, Idaho. The drift yard lies on the right bank of the delta where the Clark Fork River meets Lake Pend Oreille. The facility as a whole is spread over three river miles just downstream of Clark Fork, Idaho. The facility operates passively by directing drift floating with the current in the main stem of the Clark Fork River through a series of boom systems and eventually into a drift holding facility where it is contained indefinitely. Drift typically originates from highwater events in nearby Lightning Creek during flood season, but has the potential to appear in the river and delta area year-round based on activities occurring in the area. Drift typically consists of woody debris in a variety of sizes, from small sticks to entire trees with roots intact. The purpose is to maintain and operate the drift facility into the future, which prevents the majority of the hazardous driftwood from entering Lake Pend Oreille from the Clark Fork River and instead directs it to a storage yard. This keeps Lake Pend Oreille and the lower Clark Fork River safe for navigation. The Army Corps of Engineers (Corps) recognizes an obligation to operate the drift facility in such a way as to maintain the amount of drift in the reservoir, to the best of our ability, to pre-dam conditions. Failure to do so could result in increased risk to public safety related to navigational and recreational boat usage, both directly and indirectly. Increases in floatable drift would make navigating the reservoir more difficult, could lead to more boating accidents, and delayed response times for emergency responders.
Description: Environmental Assessment and Finding of No Significant Impact
Rights: Approved for Public Release; Distribution is Unlimited
Appears in Collections:Environmental Documents

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