USA: Ridgefield Seeks Corps Permit to Reduce Streambank Erosion

The Town of Ridgefield is seeking a permit from the U.S. Army Corps of Engineers, New England District, to conduct work in waters of the United States in conjunction with stabilizing Third Lane Stream to reduce streambank erosion in Ridgefield, Connecticut.

The town of Ridgefield is proposing to stabilize a segment of Third Lane Stream in order to reduce streambank erosion and prevent further sedimentation into Lake Mamanasco. The work is proposed in Third Lane Stream located opposite of 228 Mamanasco Road in Ridgefield. Proposed work includes regrading approximately 210 feet of the streambed and some minor regrading of the adjacent streambanks.

Filter fabric will be placed across the channel bottom and topped with crushed stone in preparation for a 1-foot thick gabion mattress. The gabion mattress will be filled with stones 4 inches or greater in diameter. Following the placement of the channel bottom mattress, filter fabric will be extended up the streambanks and gabion baskets will be wired into place.

An additional gabion layer will be added, where necessary, to meet the adjacent grade. Fill material will then be placed between the gabion baskets and the streambank in order to fill the voids. Approximately 2,700 square feet of wetland/watercourse will be impacted.

Press Release, April 30, 2014

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