The Ashokan Watershed Stream Management Program (AWSMP) has completed a project to halt bank erosion on the Stony Clove Creek near Lanesville. The channel was restored through a 2,500-foot corridor heavily damaged during Tropical Storm Irene. Restoration of the stream channel cost approximately $1.5 million.
During T.S. Irene, several homes were damaged by erosion and flooding, and sediment accumulated in the center of the channel, pushing stream flows toward the banks.
Stream banks continued to retreat in front of three remaining homes and several large hillslopes. The rapidly slumping hillslopes contributed significant amounts of fine sediment to the stream. The sediments travel miles downstream to the Esopus Creek and Ashokan Reservoir.
Engineers used a combination of instream grade and flow control structures designed to mimic naturally occurring stream features to stabilize the channel and eroding stream banks. The channel was engineered to pass both low and high stream flows, and the sediment carried by those flows, without significantly eroding.
Kingston Equipment Rental, Inc. (Baker Brothers Excavating) out of West Hurley built the project. The project was designed by consulting firm Milone & MacBroom, Inc. The Ulster County Soil and Water Conservation District (SWCD) provided overall project management.
In 2016, the Ulster County SWCD will work with landowners at the project site to tailor plantings to their properties and revegetate areas scoured during T.S. Irene. They will also continue monitoring the site.
Long-term monitoring wells were installed on a major failing hillslope at the site, and a separate phase of restoration is being planned for that hillslope in 2016.
The stream restoration was funded by the New York City Department of Environmental Protection and the Natural Resources Conservation Service Emergency Watershed Protection program. The Town of Hunter sponsored the project.
Over the past four years, AWSMP has provided local match to federal funds to complete six stream restoration projects totaling $6.8 million in the Stony Clove Creek watershed. The AWSMP is a partnership between Cornell Cooperative Extension of Ulster County, Ulster County SWCD, and New York City Department of Environmental Protection.
The AWSMP plans to carry out a stream restoration project in the Beaver Kill Watershed in the Town of Woodstock in 2017.
Tags: hillslope, stony clove, stream projects, Stream Restoration