Chagrin River
- Cleveland Metroparks
- Key Services Provided:
- Design-build Stream Restoration and Bank Stabilization
- River Realignment
- H&H Modeling
- 404 Permitting
- Wetland Delineation
- Project Duration: Winter 2020-2021
- Project Cost: $376,000.00
Chagrin River bank stabilization 1-year post-construction.
EnviroScience, Inc., partnering with RiverReach Construction, was awarded a contract to perform a design-build project on the Chagrin River in the South Chagrin Reservation in Moreland Hills, Ohio. The Chagrin River is a designated State Scenic River at this reach and is considered in attainment of water quality standards throughout the entire Scenic River corridor; however, reaches with significant bank erosion issues, such as this project site, are contributing excessive sediment into the river and leading to water quality issues. This particular reach had suffered continual bank erosion resulting in lateral migration of loss of park land and trails.
The original scope had called for 500 linear feet of river restoration to include bank stabilization using bioengineering techniques, restoration to result in improvements to in-stream habitat quality and floodplain connectivity, a reduction in stream bank erosion, and a reduction in the TDML loadings of phosphorus and nitrogen to the Chagrin River.
EnviroScience’s proposal addressed the restoration of over 800 feet of the Chagrin River incorporating bendway weirs, living dikes and streambank keys, grade controls, as well as bioengineering materials and riparian seeding and planting. The alignment of the river was restored to a geometry to create 0.75 acres of new floodplain and recovery of lost park land. Construction was completed in approximately five weeks. Nationwide permitting, H&H model development, survey and layout, and a wetland delineation were also completed as part of this project.
