South Tani Reservoir
Key Takeaway
South Tani Reservoir is classified as high hazard in Colorado. It was completed in 2006 and is 20 years old. Its primary use is water supply. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 22 ft (taller than 43.8% in CO) |
| Dam Length | 14,200 ft |
| Dam Type | Earth |
| Max Storage | 7.5K acre-ft |
| Normal Storage | 6.6K acre-ft |
| Surface Area | 228 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 930 cfs |
| Year Completed | 2006 (20 years old) |
| NID ID | CO02864 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
CITY OF THORNTON
Private
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What is the hazard classification of South Tani Reservoir?
South Tani Reservoir is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates South Tani Reservoir?
South Tani Reservoir is owned by CITY OF THORNTON (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was South Tani Reservoir built?
South Tani Reservoir was completed in 2006, making it 20 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of South Tani Reservoir?
South Tani Reservoir serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is South Tani Reservoir?
South Tani Reservoir has a dam height of 22 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was South Tani Reservoir last inspected?
South Tani Reservoir was last inspected on November 2, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.