Mitigation banks are sites where wetlands have been established, restored, or preserved with the help of organizations like the Ohio Wetlands Foundation to provide compensatory mitigation. Each bank provides credits that entities can purchase to satisfy compensatory mitigation requirements. The Foundation identifies locations throughout Ohio that are suitable for the development of mitigation banks and creates and implements the plan to establish the bank. The Foundation provides the necessary monitoring of the bank and ensures long-term preservation and management of the site.

The Foundation has sold all credits in its first five banks, totaling nearly 700 acres of wetlands restoration at Hebron, Big Island, Sandy Ridge, Three Eagles, and Slate Run. Today, credits are currently available at: Trumbull Creek, Pine Brook, Pearson Metro Park, Big Darby-Hellbranch, and very soon at Granger and Little Stillwater. Development of compensatory wetland mitigation credits follows the April 10, 2008 Federal Law for Compensatory Mitigation for Losses of Aquatic Resources. Banks operated by the Foundation are all authorized by state and federal agencies.