Abstract Description: The Versailles Lake Dam was constructed in 1956 on Laughery Creek, a tributary to the Ohio River, in Versailles State Park, Indiana. The impoundment was once used for water supply but now provides recreational value for people who utilize the Park. The Indiana Department of Natural Resources (IDNR) is looking to address current dam deficiencies associated with inadequate discharge capacity and high sedimentation rates in the impoundment which have resulted in loss of available storage. The dam is classified by IDNR as “High Hazard” due to the potential for life loss should the dam fail. In this study, we compare historical bathymetric survey data of the impoundment to current conditions to assess spatial and temporal trends in sedimentation rates. Results of this analysis indicate that sediment loading continues to exacerbate loss in reservoir storage capacity. Without sediment management or alteration of the dam facilities, the impoundment is calculated to completely fill with sediment within the next 25 years. Alternatives related to management of the sediment and alteration of the dam facilities to meet dam safety requirements and address sedimentation issue were also assessed as part of this analysis.
Learning Objectives:
Demonstrate how to use historical topographic data to assess sediment accumulation in a dam impoundment.
Analyze spatial and temporal trends in reservoir sedimentation and resulting impacts to reservoir storage capacity.
Evaluate alternatives for sediment management and approaches to dam removal.
