Highland Mary
Highland Mary is a masonry dam located in San Juan County, Colorado, built in 1903. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Highland Mary
The primary purpose of Highland Mary is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by James B. Hugins (bill Jones) (private). It impounds the Cunningham Creek near Silverton.
The dam stands 28 feet tall and stretches 117 feet across, creates a reservoir covering 48 acres, has a maximum storage capacity of 722 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1903, the structure is over a century old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 05/25/2018.
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Location
| State | Colorado |
| County | San Juan |
| Nearest City | Silverton |
| River/Stream | Cunningham Creek |
| Coordinates | 37.76500, -107.57335 |
Physical Characteristics
| Dam Type | Masonry |
| NID Height | 28 ft |
| Dam Height | 27 ft |
| Dam Length | 117 ft |
| Year Completed | 1903 (123 years old) |
Storage & Hydraulics
| NID Storage | 722 acre-ft |
| Max Storage | 722 acre-ft |
| Normal Storage | 168 acre-ft |
| Surface Area | 48 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 238 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Water Supply |
| Owner | JAMES B. HUGINS (BILL JONES) |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/25/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO01064 |
| Federal ID | CO01064 |
| More Info | State Dam Safety Program |