Calkins

ST. VRAIN CREEK· Boulder, Colorado· Built 1879· Earth· 8 ft tall
Low Hazard Irrigation Private

Key Takeaway

Calkins is classified as low hazard in Colorado. It was completed in 1879 and is 147 years old. Its primary use is irrigation.

Physical Details

Dam Height 8 ft (taller than 1.3% in CO)
Dam Length705 ft
Dam TypeEarth
Max Storage187 acre-ft
Normal Storage90 acre-ft
Surface Area17 acres
Drainage Area0 sq mi
Max Discharge0 cfs
Year Completed1879 (147 years old)
NID IDCO01202

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 9, 1985
State Regulated: Yes
Regulatory Agency: DWR

Ownership

JAMES STAMP

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Calkins?

Calkins 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 Calkins?

Calkins is owned by JAMES STAMP (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Calkins built?

Calkins was completed in 1879, making it 147 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 Calkins?

Calkins 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 Calkins?

Calkins has a dam height of 8 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 Calkins last inspected?

Calkins was last inspected on September 9, 1985. 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.