Cotter Tailings

SAND CREEK-OS· Fremont, Colorado· Built 1980· Earth· 93 ft tall
Low Hazard Tailings Private

Key Takeaway

Cotter Tailings is classified as low hazard in Colorado. It was completed in 1980 and is 46 years old. Its primary use is tailings.

Physical Details

Dam Height 93 ft (taller than 95.6% in CO)
Dam Length5,000 ft
Dam TypeEarth
Max Storage5.4K acre-ft
Normal Storage3.5K acre-ft
Surface Area151 acres
Drainage Area0 sq mi
Max Discharge0 cfs
Year Completed1980 (46 years old)
NID IDCO02206

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: September 21, 2000
State Regulated: Yes
Regulatory Agency: DWR

Ownership

ENSERO SOLUTIONS (ARY, JOANNE)

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Cotter Tailings?

Cotter Tailings 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 Cotter Tailings?

Cotter Tailings is owned by ENSERO SOLUTIONS (ARY, JOANNE) (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Cotter Tailings built?

Cotter Tailings was completed in 1980, making it 46 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 Cotter Tailings?

Cotter Tailings serves the following purposes: Tailings. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Cotter Tailings?

Cotter Tailings has a dam height of 93 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 Cotter Tailings last inspected?

Cotter Tailings was last inspected on September 21, 2000. 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.