Project Overview
Izaak Walton Reach 2 is part of the Resilient St. Vrain Project to restore the St. Vrain Greenway trail and improve the St. Vrain Creek channel to protect people, property and infrastructure from future flood risk. Longmont entered into a Public Partnership Agreement with the U.S. Army Corps of Engineers for the design and construction in 2016. Design was completed in December 2022. Construction is expected to start in Spring of 2025. This project includes channel improvements between Boston Avenue and Sunset Street. The replacement of the Boston Ave Bridge is considered part of this reach and was funded by the City as a local agency match.
Project Status
Updated: June 11, 2025
This project will start construction Spring 2025 and be completed in Fall 2026
This project will start construction Spring 2025 and be completed in Fall 2026
- On June 16 the Greenway Trail between Boston Ave and Sunset St will be closed and remain closed until the project is complete.
- Download a copy of the trail detour map.
- Access to Izaak Walton Park, Clubhouse, and pond will be available, but temporary closures will be required.
Goals & Planned Improvements
The Izaak Walton Reach 2 project will increase the channel capacity to safely contain 100-year flood water levels. Once work is completed in this reach, the floodplain to the north of the St. Vrain Creek will be mitigated, protecting lower downtown from future flood risk. The Greenway Trail will be reestablished as be a 10-ft wide concrete path with a 3-ft wide gravel shoulder.
This illustration shows the future Izaak Walton Pond and St. Vrain Creek overlaid on top of the same area before construction began.
Project Schedule
Construction started in Spring of 2025. The project is expected to take 18 months and will be complete in Fall 2026.
Frequently Asked Questions
