Hett No.1

TR-SOUTH FORK GRAND RIVER· Harding, South Dakota· Built 1958· Earth· 13 ft tall
Low Hazard Fire Protection Stock Or Small Fish Pond Private

Key Takeaway

Hett No.1 is classified as low hazard in South Dakota. It was completed in 1958 and is 68 years old. Its primary use is fire protection.

Physical Details

Dam Height 13 ft (taller than 5.1% in SD)
Dam Length550 ft
Dam TypeEarth
Max Storage60 acre-ft
Normal Storage20 acre-ft
Max Discharge250 cfs
Year Completed1958 (68 years old)
NID IDSD01868

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
State Regulated: Yes
Regulatory Agency: DANR

Ownership

DON HETT

Private

Nearby Dams

Hett No.2

Harding, SD

Low Hazard 19 ft

Gilbert No.2

Harding, SD

Low Hazard 22 ft

Gilbert No.1

Harding, SD

Low Hazard 19 ft

Matson

Harding, SD

Low Hazard 23 ft

Salmen No.1

Harding, SD

Low Hazard 15 ft

Sd Noname 130

Harding, SD

Low Hazard 27 ft

Sd Noname 106

Harding, SD

Low Hazard 12 ft

Gilbert No.3

Harding, SD

Low Hazard 13 ft

Frequently Asked Questions

What is the hazard classification of Hett No.1?

Hett No.1 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 Hett No.1?

Hett No.1 is owned by DON HETT (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Hett No.1 built?

Hett No.1 was completed in 1958, making it 68 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 Hett No.1?

Hett No.1 serves the following purposes: Fire Protection, Stock, Or Small Fish Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Hett No.1?

Hett No.1 has a dam height of 13 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.

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.