Jefferson Lake Dam Evaluation and Design Services
Built in 1934, the Jefferson Lake Dam is a Class I high-hazard potential structure. This means a structural failure would likely cause untold damage including loss of life. The dam contains a 25 x 236 foot fill embankment and concrete spillway that discharges into Rippy Run. The structure, however, lacks an emergency spillway.
S&ME evaluated the condition of a 77-year old dam. Our team performed soil borings and concrete condition survey. We also performed a bathymetric survey of the lake and a land survey of the dam and downstream area. With this information, we performed both stability and H&H analyses to assess safety against the risk of failure during a flood. These analyses suggest the existing spillway capacity is inadequate and there is significant potential for overtopping to occur.
S&ME is currently developing construction plans to assure the long term performance of the dam. In addition, S&ME is developing inundation mapping associated with an Emergency Action Plan for the dam. In the future, it is anticipated that S&ME will assist the Ohio Department of Natural Resources in administrating the construction of these improvements.