Schallow Lake Dam

Coulee Creek· Okanogan, Washington· Built 1954· Earth·
Low Hazard Recreation State Government

Key Takeaway

Schallow Lake Dam is classified as low hazard in Washington. It was completed in 1954 and is 72 years old. Its primary use is recreation.

Physical Details

Dam TypeEarth
Max Storage76 acre-ft
Normal Storage46 acre-ft
Surface Area10 acres
Drainage Area13 sq mi
Max Discharge142 cfs
Year Completed1954 (72 years old)
NID IDWA00052

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 19, 2023
State Regulated: Yes
Regulatory Agency: Washington Dept of Ecology

Ownership

WA DFW

State Government

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Frequently Asked Questions

What is the hazard classification of Schallow Lake Dam?

Schallow Lake Dam 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 Schallow Lake Dam?

Schallow Lake Dam is owned by WA DFW (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Schallow Lake Dam built?

Schallow Lake Dam was completed in 1954, making it 72 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 Schallow Lake Dam?

Schallow Lake Dam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

When was Schallow Lake Dam last inspected?

Schallow Lake Dam was last inspected on July 19, 2023. 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.