Herrick

TWENTY MILE CREEK· Converse, Wyoming· Built 1946· Earth· 30 ft tall
Low Hazard Irrigation Private

Key Takeaway

Herrick is classified as low hazard in Wyoming. It was completed in 1946 and is 80 years old. Its primary use is irrigation.

Physical Details

Dam Height 30 ft (taller than 63.1% in WY)
Dam Length550 ft
Dam TypeEarth
Max Storage146 acre-ft
Normal Storage87 acre-ft
Surface Area10 acres
Drainage Area0 sq mi
Max Discharge0 cfs
Year Completed1946 (80 years old)
NID IDWY00724

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: April 25, 2019
State Regulated: Yes
Regulatory Agency: SEO

Ownership

MILL IRON DIAMOND RANCH

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Herrick?

Herrick 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 Herrick?

Herrick is owned by MILL IRON DIAMOND RANCH (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Herrick built?

Herrick was completed in 1946, making it 80 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 Herrick?

Herrick 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 Herrick?

Herrick has a dam height of 30 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 Herrick last inspected?

Herrick was last inspected on April 25, 2019. 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.