Twin Bridges Wastewater Lagoon Dam

BIG HOLE RIVER· Madison, Montana· 13 ft tall
High Hazard Other Local Government

Key Takeaway

Twin Bridges Wastewater Lagoon Dam is classified as high hazard in Montana. Its primary use is other. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.

Physical Details

Dam Height 13 ft (taller than 14.7% in MT)
Max Storage111 acre-ft
Normal Storage96 acre-ft
Drainage Area0 sq mi
NID IDMT03968

Safety Information

High Hazard

Loss of human life is likely if the dam fails.

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: DEQ

Ownership

CITY OF TWIN BRIDGES

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Twin Bridges Wastewater Lagoon Dam?

Twin Bridges Wastewater Lagoon Dam is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Twin Bridges Wastewater Lagoon Dam?

Twin Bridges Wastewater Lagoon Dam is owned by CITY OF TWIN BRIDGES (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

What is the primary purpose of Twin Bridges Wastewater Lagoon Dam?

Twin Bridges Wastewater Lagoon Dam serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Twin Bridges Wastewater Lagoon Dam?

Twin Bridges Wastewater Lagoon Dam 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.