Cyrus Reservoir

SQUAW CREEK· Deschutes, Oregon· Built 1968· Earth· 17 ft tall
Low Hazard Irrigation Private

Key Takeaway

Cyrus Reservoir is classified as low hazard in Oregon. It was completed in 1968 and is 58 years old. Its primary use is irrigation.

Physical Details

Dam Height 17 ft (taller than 23% in OR)
Dam Length1,640 ft
Dam TypeEarth
Max Storage80 acre-ft
Normal Storage113 acre-ft
Surface Area8 acres
Drainage Area1 sq mi
Max Discharge8 cfs
Year Completed1968 (58 years old)
NID IDOR00446

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: February 18, 2020
State Regulated: Yes
Regulatory Agency: OWRD

Ownership

KEITH CYRUS

Private

Nearby Dams

Squaw Creek Id Reservoir

Deschutes, OR

Low Hazard 18 ft

Mckenzie Canyon Dam

Deschutes, OR

Significant Hazard 18 ft

Upper Tumalo Reservoir

Deschutes, OR

Low Hazard 11 ft

Sparks

Deschutes, OR

Significant Hazard 19 ft

Gillworth Reservoir

Jefferson, OR

Significant Hazard 29 ft

Frequently Asked Questions

What is the hazard classification of Cyrus Reservoir?

Cyrus Reservoir 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 Cyrus Reservoir?

Cyrus Reservoir is owned by KEITH CYRUS (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Cyrus Reservoir built?

Cyrus Reservoir was completed in 1968, making it 58 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 Cyrus Reservoir?

Cyrus 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 Cyrus Reservoir?

Cyrus Reservoir has a dam height of 17 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 Cyrus Reservoir last inspected?

Cyrus Reservoir was last inspected on February 18, 2020. 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.