About the Wetlands Inventory Project

The Wetland Inventory Project (WIP), led by the Bureau of Environmental Services, is using the Oregon Department of State Lands methodology to map wetlands throughout all of Portland.

Wetlands are critical features that hold stormwater, reduce flood risks, improve water quality and provide habitat.

The WIP data will be incorporated directly into the city’s Natural Resources Inventory (NRI) and used to inform multiple planning projects, including the Buildable Lands Inventory and Economic Opportunity Analysis update.

BES conducts free on-site wetland determinations to verify the mapping. You may have received a letter from the City requesting access to perform a wetland determination. If you would like to schedule a wetland determination, please fill out this form:

Find out more about WIP through this self-guided presentation: