Geddes is a state-regulated earthen dam located in South Dakota, specifically in Charles Mix County.
Wind
Humidity
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.
Year Completed |
1940 |
Dam Length |
1040 |
Dam Height |
29 |
River Or Stream |
PEASE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
29 |
Drainage Area |
40 |
Nid Storage |
2100 |
Outlet Gates |
Vertical Lift |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
29 |
Platte Creek Near Platte
|
3cfs |
Ponca Creek At Verdel
|
23cfs |
Niobrara River Nr. Verdel
|
517cfs |
Niobrara River At Mariaville
|
1530cfs |
Firesteel Cr Near Mount Vernon Sd
|
0cfs |
Bazile Creek Near Niobrara
|
192cfs |
| Location | Reservations | Toilets |
|---|---|---|
Pease Creek Rec Area
|
||
North Wheeler State Rec Area
|
||
North Point - Lake Francis Case
|
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Randall Creek Park - Lake Francis Case
|