Thanks for visiting the Upper White River Channel Migration Zone (CMZ) Study website. Starting in 2019, Pierce County will conduct a CMZ Study along the Upper White River from Greenwater to upstream of Crystal River Ranch and Crystal Village along Highway 410.
Our website will be fully live in April. We’ll have information about the study, how it will be conducted and how you can provide important feedback to the county on the study.
Intro to the CMZ Study
Channel migration zone studies and maps provide critical baseline information necessary to understand the effects of potential river migration on hazards in river valleys. Identifying channel migration zones can help communities establish management practices that guide development away from the most dangerous channel migration zones and reduce flood hazards. The Upper White River CMZ study will provide a level of certainty to current and future property owners as it will identify low-risk areas, that is, areas that would not be as likely to be harmed by channel migration.
Please bookmark and come back to this site in April to learn more.