Geddes

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Geddes is a state-regulated earthen dam located in South Dakota, specifically in Charles Mix County. Built in 1940 by the Works Progress Administration (WPA), Geddes stands at a height of 29 feet and spans a length of 1040 feet across Pease Creek. The dam has a storage capacity of 2100 acre-feet, with a normal storage level of 820 acre-feet and a drainage area of 40 square miles.

Despite its low hazard potential, Geddes has a moderate risk assessment of 3 out of 5 due to its age and condition rating of "Not Rated." The dam features an uncontrolled spillway with a width of 70 feet and vertical lift outlet gates. The last inspection of Geddes took place in October 2016, with a scheduled inspection frequency of every 3 years. While the Emergency Action Plan (EAP) status and risk management measures for Geddes are not specified, the dam is deemed to meet safety guidelines.

Overall, Geddes serves as a vital structure for water resource management in the area, playing a key role in flood control and water storage along Pease Creek. As a state-owned and regulated dam, Geddes' historical significance, design characteristics, and risk assessment highlight its importance in the region's water infrastructure and climate resilience efforts.