Duncan Creek Diversion

Duncan Creek· Placer, California· Built 1965· Concrete· 20 ft tall
Low Hazard Irrigation Hydroelectric Water Supply Local Government

Key Takeaway

Duncan Creek Diversion is classified as low hazard in California. It was completed in 1965 and is 61 years old. Its primary use is irrigation.

Physical Details

Dam Height 20 ft (taller than 15.3% in CA)
Dam Length165 ft
Dam TypeConcrete
Max Storage20 acre-ft
Normal Storage20 acre-ft
Surface Area2 acres
Drainage Area9 sq mi
Max Discharge7,200 cfs
Year Completed1965 (61 years old)
NID IDCA82564

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: June 22, 2022
State Regulated: No

Ownership

Placer County Water Agency

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Duncan Creek Diversion?

Duncan Creek 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 Duncan Creek Diversion?

Duncan Creek Diversion is owned by Placer County Water Agency (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Duncan Creek Diversion built?

Duncan Creek Diversion was completed in 1965, making it 61 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 Duncan Creek Diversion?

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

How tall is Duncan Creek Diversion?

Duncan Creek Diversion has a dam height of 20 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 Duncan Creek Diversion last inspected?

Duncan Creek Diversion 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.