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Walnut Woods Stream and Wetland Restoration

Franklin County, OH

EMH&T worked for both the Columbus Regional Airport Authority (CRAA) and Columbus and Franklin County Metro Parks (Metro Parks) in the study, design and permitting of a comprehensive ecosystem restoration project within a new regional Metro Park site. A portion of the restoration activities served as mitigation for impacts to wetlands and streams at Port Columbus International Airport. The project was primarily funded through the American Recovery and Reinvestment Act (ARRA). The 482-acre project area included the restoration of more than 7,000 linear feet of a perennial stream channel that was previously hydromodified for agricultural drainage, nearly 70 acres of wetlands within areas historically used for agricultural and nursery activities, and close to 30 acres of riparian corridor and other forested areas. EMH&T prepared the Final Mitigation Plan to support the Section 404/401 permitting for the impacts at Port Columbus, and completed the detailed engineering plans, bid documents and a detailed engineer’s estimate of probable construction costs for the restoration. We also supported the construction bidding process for the project and provided full-time construction administration services throughout the duration of the project construction. Post-construction, we have provided onsite management of invasive species via our in-house herbicide application services and completed post-construction monitoring services, including geomorphologic stream measurements, hydrologic monitoring, vegetation assessments, as well as fish and macroinvertebrate sampling.

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