Using the Credit-Debit Method for Estimating Mitigation Needs

WA State Department of Ecology/The Padilla Bay NERR


Thursday, April 20, 2017, 9 a.m.
Monday, February 27, 2017, 4 p.m. PST

Lacey, WA, United States

CM | 6

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This one-day class will provide wetland regulators and consultants with a practical tool for calculating if mitigation projects will adequately replace the functions and values lost to altered wetlands.The class is based on a new method developed by the Department of Ecology called ""Calculating Credits and Debits for Compensatory Mitigation in Wetlands of Western Washington"" (Ecology Publication #10-06-11). This method is designed to provide guidance for both regulators and applicants during two stages of the mitigation process: 1) estimating the functions and values lost when a wetland is altered, and 2) estimating the gain in functions and values that result from the mitigation.


The Credit Debit Method is based on the Washington State Wetland Rating System for Western Washington (Ecology publication #04-06-025). This workshop however does not provide training in the wetland rating system. Training in the wetland rating system is strongly suggested as a PRE-REQUISITE for this workshop.


You will receive a copy of the “Credit-Debit” manual. The morning session will be held inside. The afternoon session will be conducted in local wetlands, so dress appropriately.

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Amy Yahnke

Instructors: Dr. Amy Yahnke is the senior wetland ecologist for the Shorelands and Environmental Assistance Program at the Washington State Department of Ecology. She holds a Certificate in Wetland Science and Management, BS in Environmental Horticulture, MS in Forest Resources, and PhD in Aquatic and Fishery Sciences. She has studied ... Read More

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Cathy Angell,