A plan released by the U.S. Army Corps of Engineers calls for dredging at the ports of Lewiston and Clarkston and in the shipping channel of the lower Snake and Clearwater rivers to deal with sediment.
However, the draft of the agency’s Sediment Management Plan and environmental impact statement does not include raising Lewiston’s levees in the near term to guard against long-term flood risks.
The agency has spent more than $16 million to prepare the plan that outlines a long-term strategy to deal with sediment accumulating in the slackwater behind the four lower Snake River dams. The corps has been working on the plan to deal with the problem since 2005.
The release of the Corps plan will be followed by a 55-day public comment period that begins next Friday.