The Au Sable is a major tributary to Lake Huron. It drains a north-south basin that includes 1,932 square miles in north-central lower Michigan. The basin is approximately 90 miles long and 10 to 30 miles wide. The river basin is partially within the Huron National Forest and includes parts of Otsego, Montmorency, Crawford, Osco, Alcona, Roscommon, Ogemaw, and Iosco counties.

Au Sable River Plan Full Text (1.4 MB)

Below are individual sections of the plan:
-Cover Sheet, Preface and Table of Contents
-Map
-Introduction
-The Watershed
-Existing Uses adn Cultural Opportunities
-Au Sable River Natural River Plan
-Appendix A - Part 305 - Natural Rivers PA 451 of 1994
-Appendix B - Natural Resources Commission Policy and Procedure Regarding the Natural River Act of 1970
-Appendix C - Related Laws
-Appendix D - "Alteration of Rivers" Law
-Appendix E - Designated Stream Mileage
-Appendix F - Log-Sod Covered Docks--Design