Elmer Reservoir 3 (Union)

GRANDE RONDE RIVER· Union, Oregon· Built 1977· Earth· 14 ft tall
Low Hazard Irrigation Private

Key Takeaway

Elmer Reservoir 3 (Union) is classified as low hazard in Oregon. It was completed in 1977 and is 49 years old. Its primary use is irrigation.

Physical Details

Dam Height 14 ft (taller than 12.5% in OR)
Dam Length1,200 ft
Dam TypeEarth
Max Storage400 acre-ft
Normal Storage58 acre-ft
Surface Area36 acres
Drainage Area0 sq mi
Max Discharge54 cfs
Year Completed1977 (49 years old)
NID IDOR00651

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: July 27, 2011
State Regulated: Yes
Regulatory Agency: OWRD

Ownership

JOHN P. HASSINGER

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Elmer Reservoir 3 (Union)?

Elmer Reservoir 3 (Union) 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 Elmer Reservoir 3 (Union)?

Elmer Reservoir 3 (Union) is owned by JOHN P. HASSINGER (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Elmer Reservoir 3 (Union) built?

Elmer Reservoir 3 (Union) was completed in 1977, making it 49 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 Elmer Reservoir 3 (Union)?

Elmer Reservoir 3 (Union) 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 Elmer Reservoir 3 (Union)?

Elmer Reservoir 3 (Union) has a dam height of 14 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 Elmer Reservoir 3 (Union) last inspected?

Elmer Reservoir 3 (Union) was last inspected on July 27, 2011. 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.