What is a Mitigation Credit?
Mitigation credits are acquired to satisfy mitigation requirements for permitted, unavoidable impacts to wetlands and
related aquatic habitat. A mitigation credit is the approved unit of exchange used to replace an equivalent area
of lost aquatic habitat and function (ie. permitted impact) through a mitigation bank (i.e. mitigation for impact).
For the SHMB, the increase in aquatic function represented by one credit is equivalent to the aquatic function
provided by one acre of intact Category II wetlands in Western Washington.
- A Practical Definition: 1 Credit = 1 acre of Category II wetlands
- An Ecological Description of a Credit: A credit from the SHMB represents an area where the river flows freely from the mainstem
Skykomish River, through a dynamic side channel network, and into floodplain wetlands, while carving out complex
niches of side channels and pool habitat that will provide critical off-channel refugia for juvenile and rearing
salmonids. Under this definition, the use of a credit reflects the full value of the ecological benefits provided
by the integrated components of the dynamic, natural process-driven system by recognizing the results from restoring
dynamic habitat-forming processes that form complex, multi-component habitat.
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