Highland Mary

CUNNINGHAM CREEK· San Juan, Colorado· Built 1903· Masonry· 27 ft tall
Low Hazard Water Supply Private

Key Takeaway

Highland Mary is classified as low hazard in Colorado. It was completed in 1903 and is 123 years old. Its primary use is water supply.

Physical Details

Dam Height 27 ft (taller than 59.3% in CO)
Dam Length117 ft
Dam TypeMasonry
Max Storage722 acre-ft
Normal Storage168 acre-ft
Surface Area48 acres
Drainage Area1 sq mi
Max Discharge238 cfs
Year Completed1903 (123 years old)
NID IDCO01064

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 25, 2018
State Regulated: Yes
Regulatory Agency: DWR

Ownership

JAMES B. HUGINS (BILL JONES)

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Highland Mary?

Highland Mary 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 Highland Mary?

Highland Mary is owned by JAMES B. HUGINS (BILL JONES) (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Highland Mary built?

Highland Mary was completed in 1903, making it 123 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 Highland Mary?

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

How tall is Highland Mary?

Highland Mary has a dam height of 27 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 Highland Mary last inspected?

Highland Mary was last inspected on May 25, 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.