Todd County Bridge No. 77537 Rock Arch Rapids
Todd County Bridge No. 77537 replaced an environmentally and structurally deficient bridge built in the 1940s. A major concern posed by the existing bridge was the Little Swan Lake outlet’s steep grade, which acted as a barrier to fish and other native species. The five-tier rock arch boulder weir now allows easy passage for aquatic species. The 45‑foot single span beam bridge minimizes river encroachment and provides safe passage for motorists.