Quible & Associates, P.C.
ENGINEERING * ENVIRONMENTAL SCIENCES * PLANNING * SURVEYING
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French Broad Crossing Development

Client: The Preserve Communities, LLC

Photo: View Upstream of Project Area

Quible Project Summary: Regulatory correspondence, consultation, planning, and permitting with US Army Corps of Engineers (USACE) and NC Division of Water Resources (NC DWR), Wetland Delineation, Stream Determination, Planning and Design, and Stream and Wetland Restoration. Impacts to perennial and intermittent reaches of a tributary to the French Broad River and a wetland, associated with installation of a culvert, were delineated and mitigated for.

A restoration plan was developed to address impacts and was permitted with the USACE and NC DWR. The plan was designed to stabilize and restore the stream channel in the project area as well as preserve an existing wetland. Approximately 160 linear feet of intermittent and perennial stream channel was restored. A wetland upstream of the project area was preserved as part of the project, and a culvert that did not meet NC DWR specifications for installation was modified and brought into compliance. The restoration efforts included installation of a clay filled cut-off trench and two rock sills upstream of the culvert to preserve hydrology in the wetland and prevent head-cutting of the stream channel. The stream channel downstream of the culvert was stabilized through benching and sloping and installation of instream hydraulic structures that also prevented head-cutting and promote aquatic passage. The project area was re-vegetated with a variety of wetland and riparian vegetation installed as seed and container plants.