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Mitigation Toolbox

Mitigation Guidance, Templates, Regulations and Links

Mitigation Templates and Examples

WSDOT-Specific Mitigation Guidance

Performance Criteria

Regulations Guiding Wetland Protection

Interagency Guidance on Wetland Mitigation

The following two volumes, also known as Joint Guidance, were developed by Ecology, the EPA, and the Corps:

Wetland Mitigation Types

Mitigation Requirements and Ratios

Ecology's guidance Wetland Mitigation in Washington State includes the following information about mitigation ratios and buffer widths:

For information about locating a mitigation site on public lands, refer to Chapter 457 of the Environmental Procedures Manual regarding Section 4(f) properties.  

Impact Assessment and Wetland Delineation