Sly Park
Key Takeaway
Sly Park is classified as high hazard in California. It was completed in 1955 and is 71 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 | 182 ft (taller than 93.4% in CA) |
| Dam Length | 760 ft |
| Dam Type | Earth |
| Max Storage | 41.0K acre-ft |
| Surface Area | 677 acres |
| Drainage Area | 17 sq mi |
| Year Completed | 1955 (71 years old) |
| NID ID | CA01523 |
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
El Dorado Irrigation District
Public Utility
Nearby Dams
El Dorado Forebay
El Dorado, CA
High Hazard 91 ftBrush Creek
El Dorado, CA
Significant Hazard 213 ftCamino
El Dorado, CA
Low Hazard 133 ftWeber
El Dorado, CA
High Hazard 92 ftBlakely
El Dorado, CA
Low Hazard 19 ftSlab Creek
El Dorado, CA
High Hazard 250 ftJunction
El Dorado, CA
Significant Hazard 168 ftFay Gunby
El Dorado, CA
High Hazard 40 ftFrequently Asked Questions
What is the hazard classification of Sly Park?
Sly Park 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 Sly Park?
Sly Park is owned by El Dorado Irrigation District (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Sly Park built?
Sly Park was completed in 1955, making it 71 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 Sly Park?
Sly Park serves the following purposes: Water Supply, Irrigation, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Sly Park?
Sly Park has a dam height of 182 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 Sly Park last inspected?
Sly Park was last inspected on March 10, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.