DESCRIPTION
The City of Orting developed final designs for the Calistoga Setback Levee on the middle Puyallup River mainstem in the Orting area. The lead entity, Pierce County, had identified this specific location as a high priority area and setback levees as the preferred action type for recovery of Chinook salmon. Historically, the Puyallup River could meander within its river channel, a natural river process, and was connected to its floodplain creating additional habitat outside the channel. This created excellent salmon habitat with multiple river channels separated by sand and gravel bars. More recently, a man-made levee system disconnected the river from its floodplain and prevented natural maindering. Since its construction, spawning Chinook numbers have been reduced from 42,000 to 1,300. This proposed setback levee will reconnect approximately 53 acres of floodplain to the river. The new levee will reestablish natural river processes, reconnect a portion of the Puyallup River to its natural flood plain, and restore salmon habitat damaged by human construction. As a side benefit, the levee will provide additional flood protection to the community. This levee will benefit a variety of salmonid species including ESA threatened Chinook, steelhead, and bull trout. EDT modeling shows the Puyallup fall Chinook, a unique salmon population, is on a path of extinction, but a significant number of setback levees, like this proposed project, could reverse that trend.