Foss
WASHITA RIVER·
Custer, Oklahoma·
Built 1961·
Earth·
142 ft tall
Physical Details
| Dam Height | 142 ft (taller than 99.8% in OK) |
| Dam Length | 18,130 ft |
| Dam Type | Earth |
| Max Storage | 816.9K acre-ft |
| Normal Storage | 168.7K acre-ft |
| Surface Area | 13,141 acres |
| Drainage Area | 1,466 sq mi |
| Max Discharge | 3,150 cfs |
| Year Completed | 1961 (65 years old) |
| Year Modified | 1985 |
| NID ID | OK02503 |
Safety Information
High Hazard
Loss of human life is likely if the dam fails
Emergency Action Plan: Yes
Last Inspection: June 30, 2020
State Regulated: No
Ownership
RECLAMATION
Federal Government
Nearby Dams
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Significant Hazard 25 ftSCS-Soldier Creek Site-009
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Low Hazard 26 ftSCS-Butler Laterals Site-004
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Low Hazard 35 ftSCS-Soldier Creek Site-010
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Low Hazard 28 ftSCS-Butler Laterals Site-005
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Low Hazard 42 ftFrequently Asked Questions
What is the hazard classification of Foss?
Foss is classified as High Hazard. Loss of human life is likely if the dam fails.
Who owns Foss?
Foss is owned by RECLAMATION (Federal Government).
When was Foss last inspected?
Foss was last inspected on June 30, 2020.
When was Foss built?
Foss was completed in 1961, making it 65 years old.
Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.