Community
Park County is undertaking an important project to update the Yellowstone River Channel Migration Zone (CMZ) mapping, a critical tool for understanding how the river moves over time. Spanning approximately 86 miles from Gardiner to Springdale, this updated mapping effort provides valuable insights into how the river’s natural migration can impact infrastructure, land use, and flood preparedness.
Why Is This Project Important?
The Yellowstone River is the longest undammed river in the lower 48 states, making it a dynamic and ever-changing waterway. Over time, rivers naturally shift course, a process known as channel migration. While this movement is a key part of a healthy ecosystem, it can also pose risks to roads, bridges, homes, and businesses located near the riverbanks.
In June 2022, historic flooding caused rapid changes to the Yellowstone River’s course, altering areas that had remained stable for decades. This event underscored the importance of having up-to-date data to help communities, landowners, and emergency responders prepare for and mitigate potential future impacts.
Project Goals and Benefits
Funded by a Montana Department of Natural Resources and Conservation (DNRC) grant, this mapping update builds on previous CMZ studies, incorporating high-resolution imagery and new scientific assessments. The primary goals include:
- Improving Flood Risk Awareness – Identifying areas most susceptible to erosion and migration to better prepare for future flood events.
- Supporting Emergency Response Planning – Providing crucial data for first responders and local agencies in case of flood-related emergencies.
- Guiding Smart Development – Helping property owners and planners make informed decisions about building and infrastructure placement near the river.
- Protecting the River’s Natural Functions – Promoting a balance between development and maintaining the ecological health of the Yellowstone River.
What This Means for Residents
The updated CMZ maps are not regulatory but serve as a resource to help residents and local officials make informed choices. Whether you own land along the river or simply value the natural beauty and economic benefits the river provides, understanding its natural processes helps protect both the community and the environment.
By taking a proactive approach, Park County aims to reduce future flood-related costs, minimize property damage, and ensure that the Yellowstone River remains a vibrant and sustainable resource for generations to come.
For more information on the CMZ mapping project or to view the updated maps, visit the projects page on the city website. https://livingstonmontana.us21.list-manage.com/track/click?u=faf6646811b77c146ecf91bea&id=ccb7e08ea9&e=09ba628369