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Wetland Mitigation Monitoring

Davey was retained by Ohio Department of Transportation (ODOT) to provide ecological consulting services for the Turkeyfoot and Dry Creek mitigation sites located in Henry County, Ohio. These sites were constructed as compensatory mitigation for the HEN/LUC-24-10.42/0.00 (PID 81134) project. This project impacted 10,854 linear feet of stream and 8.08 acres of wetlands during construction of 21.8 miles of a new four-lane limited access highway for US Route 24 from Napoleon to Waterville, Ohio. An individual Section 404 permit from U.S. Army Corps of Engineers (USACE) and an individual 401 Water Quality Certification from Ohio Environmental Protection Agency (EPA) were required for the project due to these impacts to water resources.

The Turkeyfoot and Dry Creek mitigation sites total 144.3 acres and consist of areas utilized for wetland preservation, enhancement, and restoration, riparian enhancement, and stream preservation. The approved mitigation plan for the Turkeyfoot and Dry Creek mitigation sites calls for the restoration of 27.47 acres of Category 2 wetlands, preservation of 7.30 acres of existing wetlands, preservation of 86.60 acres of upland buffer, preservation of 6,681 linear feet of stream, and enhancement of 19.57 acres of riparian corridor.

Annual monitoring data collected by Davey include soils, hydrology, and vegetation data. The Vegetation Index of Biotic Integrity (VIBI), an intensive quantitative vegetation sampling methodology developed by Ohio EPA, will also be performed. Davey has monitored the sites’ success over a five-year period and submitted annual Permit Compliance Reports to ODOT which were subsequently provided to and accepted by USACE and Ohio EPA. Davey also provides yearly adaptive management activities including invasive species treatment and additional plantings at the direction of ODOT.

The Turkeyfoot and Dry Creek sites are currently in the fifth year of monitoring and have shown remarkable progress. The sites are well vegetated and are currently meeting all of the agency required performance standards