Gilmore

Tr Mormon Slough· San Joaquin, California· Built 1918· Earth· 28 ft tall
Significant Hazard Water Supply Irrigation Private

Key Takeaway

Gilmore is classified as significant hazard in California. It was completed in 1918 and is 108 years old. Its primary use is water supply. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 28 ft (taller than 27.2% in CA)
Dam Length1,080 ft
Dam TypeEarth
Max Storage550 acre-ft
Surface Area52 acres
Drainage Area5 sq mi
Year Completed1918 (108 years old)
NID IDCA00655

Safety Information

Significant Hazard

No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.

Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?

Emergency Action Plan: Yes
Last Inspection: June 22, 2022
State Regulated: Yes
Regulatory Agency: DWR, Division of Safety of Dams

Ownership

Private Entity

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Gilmore?

Gilmore is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Gilmore?

Gilmore is owned by Private Entity (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Gilmore built?

Gilmore was completed in 1918, making it 108 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 Gilmore?

Gilmore serves the following purposes: Water Supply, Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Gilmore?

Gilmore has a dam height of 28 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 Gilmore last inspected?

Gilmore was last inspected on June 22, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.

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.