Spring

Longhollow Creek· Madera, California· Built 1971· Earth· 41 ft tall
Significant Hazard Water Supply Recreation Private

Key Takeaway

Spring is classified as significant hazard in California. It was completed in 1971 and is 55 years old. Its primary use is water supply. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 41 ft (taller than 49.2% in CA)
Dam Length335 ft
Dam TypeEarth
Max Storage152 acre-ft
Surface Area22 acres
Drainage Area3 sq mi
Year Completed1971 (55 years old)
NID IDCA00708

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: September 24, 2021
State Regulated: Yes
Regulatory Agency: DWR, Division of Safety of Dams

Ownership

Yosemite Lakes Owners Association

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Spring?

Spring 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 Spring?

Spring is owned by Yosemite Lakes Owners Association (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Spring built?

Spring was completed in 1971, making it 55 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 Spring?

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

How tall is Spring?

Spring has a dam height of 41 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 Spring last inspected?

Spring was last inspected on September 24, 2021. 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.