Pea Ridge Tailings Dam
TR-MARYS CREEK·
Washington, Missouri·
Built 1980·
Rockfill·
150 ft tall
Physical Details
| Dam Height | 150 ft (taller than 99.9% in MO) |
| Dam Length | 1,380 ft |
| Dam Type | Rockfill |
| Max Storage | 4.1K acre-ft |
| Normal Storage | 4.1K acre-ft |
| Surface Area | 80 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 3,275 cfs |
| Year Completed | 1980 (46 years old) |
| NID ID | MO30473 |
Safety Information
High Hazard
Loss of human life is likely if the dam fails
Emergency Action Plan: Yes
Last Inspection: October 5, 2021
State Regulated: Yes
Regulatory Agency: Dam and Reservoir Safety Program
Ownership
CALDERA HOLDING LLC
Private
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Low Hazard 20 ftFrequently Asked Questions
What is the hazard classification of Pea Ridge Tailings Dam?
Pea Ridge Tailings Dam is classified as High Hazard. Loss of human life is likely if the dam fails.
Who owns Pea Ridge Tailings Dam?
Pea Ridge Tailings Dam is owned by CALDERA HOLDING LLC (Private).
When was Pea Ridge Tailings Dam last inspected?
Pea Ridge Tailings Dam was last inspected on October 5, 2021.
When was Pea Ridge Tailings Dam built?
Pea Ridge Tailings Dam was completed in 1980, making it 46 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.