Jimmy Creek Reservoir

JIMMY CREEK· Union, Oregon· Built 1981· Earth· 42 ft tall
Significant Hazard Irrigation Private

Key Takeaway

Jimmy Creek Reservoir is classified as significant hazard in Oregon. It was completed in 1981 and is 45 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 42 ft (taller than 79.1% in OR)
Dam Length265 ft
Dam TypeEarth
Max Storage675 acre-ft
Normal Storage675 acre-ft
Surface Area53 acres
Drainage Area40 sq mi
Max Discharge1,858 cfs
Year Completed1981 (45 years old)
NID IDOR00677

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: No
Last Inspection: June 6, 2018
State Regulated: Yes
Regulatory Agency: OWRD

Ownership

SEVEN DIAMOND RANCH

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Jimmy Creek Reservoir?

Jimmy Creek Reservoir 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 Jimmy Creek Reservoir?

Jimmy Creek Reservoir is owned by SEVEN DIAMOND RANCH (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Jimmy Creek Reservoir built?

Jimmy Creek Reservoir was completed in 1981, making it 45 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 Jimmy Creek Reservoir?

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

How tall is Jimmy Creek Reservoir?

Jimmy Creek Reservoir has a dam height of 42 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 Jimmy Creek Reservoir last inspected?

Jimmy Creek Reservoir was last inspected on June 6, 2018. 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.