Summit

DRY DRAW· Lyman, South Dakota· Built 1938· Earth· 18 ft tall
Low Hazard Fish And Wildlife Pond Recreation Federal Government

Key Takeaway

Summit is classified as low hazard in South Dakota. It was completed in 1938 and is 88 years old. Its primary use is fish and wildlife pond.

Physical Details

Dam Height 18 ft (taller than 24.1% in SD)
Dam Length250 ft
Dam TypeEarth
Max Storage60 acre-ft
Normal Storage6 acre-ft
Max Discharge540 cfs
Year Completed1938 (88 years old)
NID IDSD01122

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: June 1, 1978
State Regulated: No
Regulatory Agency: DANR

Ownership

USDA FS

Federal Government

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Richland (Nid)

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Sheriff (Nid)

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Low Hazard 23 ft

County Line Impoundment

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Low Hazard 17 ft

Sheriff Number 1

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Stockton Ranch No. 1

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Monument

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Low Hazard 22 ft

Frequently Asked Questions

What is the hazard classification of Summit?

Summit 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 Summit?

Summit is owned by USDA FS (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Summit built?

Summit was completed in 1938, making it 88 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 Summit?

Summit serves the following purposes: Fish And Wildlife Pond, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Summit?

Summit has a dam height of 18 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 Summit last inspected?

Summit was last inspected on June 1, 1978. 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.