Alkali (Nid)

DRY DRAW· Lyman, South Dakota· Built 1938· Earth· 16 ft tall
Low Hazard Fire Protection Stock Or Small Fish Pond Fish And Wildlife Pond Federal Government

Key Takeaway

Alkali (Nid) is classified as low hazard in South Dakota. It was completed in 1938 and is 88 years old. Its primary use is fire protection.

Physical Details

Dam Height 16 ft (taller than 15.7% in SD)
Dam Length420 ft
Dam TypeEarth
Max Storage75 acre-ft
Normal Storage75 acre-ft
Surface Area0 acres
Drainage Area1 sq mi
Max Discharge372 cfs
Year Completed1938 (88 years old)
NID IDSD01174

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: October 12, 2006
State Regulated: No
Regulatory Agency: DENR

Ownership

USDA FS

Federal Government

Nearby Dams

Carl Hansen

Stanley, SD

Low Hazard 24 ft

Grass Creek 727 (Nid)

Stanley, SD

Low Hazard 24 ft

83 No 2 (Nid)

Lyman, SD

Low Hazard 18 ft

Lookout

Lyman, SD

Low Hazard 25 ft

Stockwater Dam

Stanley, SD

Low Hazard 28 ft

County Line Impoundment

Lyman, SD

Low Hazard 17 ft

Summit

Lyman, SD

Low Hazard 18 ft

Mallard Dam

Lyman, SD

Low Hazard 20 ft

Frequently Asked Questions

What is the hazard classification of Alkali (Nid)?

Alkali (Nid) 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 Alkali (Nid)?

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

When was Alkali (Nid) built?

Alkali (Nid) 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 Alkali (Nid)?

Alkali (Nid) serves the following purposes: Fire Protection, Stock, Or Small Fish Pond, Fish And Wildlife Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Alkali (Nid)?

Alkali (Nid) has a dam height of 16 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 Alkali (Nid) last inspected?

Alkali (Nid) was last inspected on October 12, 2006. 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.