The U.S. Army Corps of Engineers, St. Paul District, has awarded a $10 million contract to Three Oaks Construction Inc., from North Sioux City, South Dakota, to construct a protective island upstream from the embankment at Lock and Dam 2, near Hastings.
The goal of the Lock and Dam 2 protective island is to safeguard the existing embankment on the upstream, windward side acting as a buffer from wind and wave erosion.
The 3,250-foot-long earthen embankment was constructed in 1930 and has since suffered degradation due to weather conditions, lack of vegetation, and the erosive effects of high-water events.
The island will be constructed using near-by river material from the 9-foot navigation channel that will feature various heights above the typical pool elevation to provide habitat benefits including tall grasses, tree plantings, a wetland, rock features and an overwintering fish habitat.
The work is scheduled to begin Spring of 2025 and anticipated to be done the fall of 2027.
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