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City of Portland, Bureau of Environmental Services is designing a project to reconnect Johnson Creek with its floodplain near SE Deardorff Road. The project is part of a broad city effort to improve habitat conditions and reduce the impacts of flooding along Johnson Creek.
This project is currently being designed. Construction is anticipated to begin in Summer 2020.
You might see city staff and contractors on the project sites conducting field reconnaissance, taking water and soil samples, marking utilities, etc. These field visits will inform the engineering team on design and construction of the project.
The Cedar Crossing Floodplain Restoration project will take place along Johnson Creek in east Portland, near the covered bridge on SE Deardorff Road. In the 1930’s, the Works Progress Administration straightened and rock-lined the banks of the creek in this area to try and reduce flooding. Unfortunately, these changes to the creek increased downstream flooding by disconnecting the creek from its floodplain, made the creek warmer by removing trees along the banks, and also reduced habitat for endangered salmon, steelhead, and other wildlife.
This project will reconnect Johnson Creek with its floodplain and provide space where flood waters can safely spread out, slow down, and sink into the ground. Added habitat features such as logs will help slow down the speed of flood waters, which will not only reduce downstream flooding and erosion problems, but also provide hiding places for fish and other wildlife when the current is very strong. Native plantings along the banks will help shade the creek and keep it cooler in the summer, and also provide food and shelter for wildlife.
With questions, comments or to stay updated with the project progress, contact Ning Jiang at Ning.Jiang@portlandoregon.gov, Kate Carone at Kate.Carone@portlandoregon.gov, or visit the project website www.portlandoregon.gov/bes/CedarCrossing.