levees

Columbia River levees

Effort to Bolster Portland’s 27 Miles of Levees Achieves Key Milestone (Willamette Week, 9/7/2021)

Thumbnail of cover from the document Statewide levee database for Oregon, release 1.0.Statewide levee database for Oregon, release 1.0 (2017) Oregon Department of Geology and Mineral Industries

Thumbnail of cover from the document Flood risk assessment for the Columbia corridor drainage districts in Multnomah County, Oregon.Flood risk assessment for the Columbia corridor drainage districts in Multnomah County, Oregon (2018) Oregon Department of Geology and Mineral Industries