Horihan-Herrick

Root River-TR· Fillmore, Minnesota· Built 1991· Earth· 34 ft tall
Low Hazard Flood Risk Reduction Private

Key Takeaway

Horihan-Herrick is classified as low hazard in Minnesota. It was completed in 1991 and is 35 years old. Its primary use is flood risk reduction.

Physical Details

Dam Height 34 ft (taller than 89% in MN)
Dam Length350 ft
Dam TypeEarth
Max Storage34 acre-ft
Normal Storage12 acre-ft
Surface Area4 acres
Drainage Area1 sq mi
Max Discharge300 cfs
Year Completed1991 (35 years old)
NID IDMN01267

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: May 22, 2018
State Regulated: Yes
Regulatory Agency: MNDNR EWR

Ownership

Herrick, Martin

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Horihan-Herrick?

Horihan-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 Horihan-Herrick?

Horihan-Herrick is owned by Herrick, Martin (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Horihan-Herrick built?

Horihan-Herrick was completed in 1991, making it 35 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 Horihan-Herrick?

Horihan-Herrick serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Horihan-Herrick?

Horihan-Herrick has a dam height of 34 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 Horihan-Herrick last inspected?

Horihan-Herrick was last inspected on May 22, 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.