A Channel Migration Zone map and associated report was completed for approximately 20 miles of the Clark Fork River from the Bitterroot River confluence, downstream to the Six Mile Creek confluence near Huson (AGI/DTM, 2009). For this project AGI and DTM worked closely with members of a Technical Advisory Group assembled by the project sponsor to develop the mapping criteria, review and revise the project maps. We utilized historic imagery that was orthorectified by Mapcon Mapping, along with more recent imagery available from NRIS. This section of river is defined by four distinct reaches, representing highly-variable channel processes. Understanding these processes was critical for developing an acceptable CMZ map. Deliverables included a tiled project CMZ map, technical memo containing mapping criteria and discussions, and all GIS data associated with the project.