North Fork Diversion

North Fork Stanislaus River· Alpine, California· Built 1989· Gravity· 53 ft tall
Low Hazard Hydroelectric Public Utility

Key Takeaway

North Fork Diversion is classified as low hazard in California. It was completed in 1989 and is 37 years old. Its primary use is hydroelectric.

Physical Details

Dam Height 53 ft (taller than 62.2% in CA)
Dam Length220 ft
Dam TypeGravity
Max Storage340 acre-ft
Normal Storage120 acre-ft
Surface Area13 acres
Drainage Area28 sq mi
Max Discharge16,300 cfs
Year Completed1989 (37 years old)
NID IDCA01234

Safety Information

Low Hazard

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?

Emergency Action Plan: No
Last Inspection: August 9, 2022
State Regulated: Yes
Regulatory Agency: DWR, Safety of Dams

Ownership

Calaveras County Water District

Public Utility

Nearby Dams

Frequently Asked Questions

What is the hazard classification of North Fork Diversion?

North Fork Diversion 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 North Fork Diversion?

North Fork Diversion is owned by Calaveras County Water District (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was North Fork Diversion built?

North Fork Diversion was completed in 1989, making it 37 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 North Fork Diversion?

North Fork Diversion serves the following purposes: Hydroelectric. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is North Fork Diversion?

North Fork Diversion has a dam height of 53 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 North Fork Diversion last inspected?

North Fork Diversion was last inspected on August 9, 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.