This document provides an overview of King County's Mitigation Reserves Program, which establishes an in-lieu fee program to provide compensatory mitigation for wetland and habitat impacts. It discusses the history and structure of the program, including how fees are collected and used to fund restoration projects. The program is a partnership between King County, state and federal regulatory agencies, and is governed by an agreement that outlines financial assurances, crediting protocols, and procedures to ensure long-term compliance.