Mitigation is required to compensate for adverse impacts to wetlands from activities that require a state or federal permit. A general overview of wetland mitigation can be found at the Oregon Department of State Lands Wetlands/Waterways Removal-Fill website.
A comprehensive guide to wetland mitigation requirements for state removal-fill permits is available. This is a draft document. Please check for updates at the Oregon Department of State Lands website.
Federal wetland mitigation requirements are available at the U.S. Army Corps of Engineers website.