Shaw Twins Upper

UNNAMED STREAM LAKE FORK CREEK· Valley, Idaho· Built 1930· 17 ft tall
Low Hazard Irrigation Private

Key Takeaway

Shaw Twins Upper is classified as low hazard in Idaho. It was completed in 1930 and is 96 years old. Its primary use is irrigation.

Physical Details

Dam Height 17 ft (taller than 16.7% in ID)
Dam Length75 ft
Normal Storage188 acre-ft
Surface Area20 acres
Drainage Area0 sq mi
Max Discharge48 cfs
Year Completed1930 (96 years old)
NID IDID00241

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 16, 2018
State Regulated: Yes
Regulatory Agency: IDWR

Ownership

Private

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Frequently Asked Questions

What is the hazard classification of Shaw Twins Upper?

Shaw Twins Upper 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 Shaw Twins Upper?

Shaw Twins Upper is owned by information not available (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Shaw Twins Upper built?

Shaw Twins Upper was completed in 1930, making it 96 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 Shaw Twins Upper?

Shaw Twins Upper 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 Shaw Twins Upper?

Shaw Twins Upper 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 Shaw Twins Upper last inspected?

Shaw Twins Upper was last inspected on July 16, 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.