Island Weir
Key Takeaway
Island Weir is classified as low hazard in California. It was completed in 1926 and is 100 years old. Its primary use is other.
Physical Details
| Dam Height | 13 ft (taller than 5.6% in CA) |
| Dam Length | 224 ft |
| Dam Type | Buttress |
| Max Storage | 230 acre-ft |
| Surface Area | 18 acres |
| Drainage Area | 1,600 sq mi |
| Year Completed | 1926 (100 years old) |
| NID ID | CA00303 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Laguna Irrigation District
Public Utility
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Island Weir?
Island Weir is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Island Weir?
Island Weir is owned by Laguna Irrigation District (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Island Weir built?
Island Weir was completed in 1926, making it 100 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 Island Weir?
Island Weir serves the following purposes: Other, Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Island Weir?
Island Weir has a dam height of 13 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 Island Weir last inspected?
Island Weir was last inspected on May 24, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.