Highland #2 (south)
Highland #2 (south) is an earth dam located in Boulder County, Colorado, built in 1881. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Highland #2 (south)
The primary purpose of Highland #2 (south) is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Highland Ditch Company (wade Gonzales) (private). It impounds the St-os near Longmont.
The dam stands 41 feet tall and stretches 2,400 feet across, creates a reservoir covering 178 acres, and has a maximum storage capacity of 4,613 acre-feet. Completed in 1881, the structure is over a century old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 06/24/2022.
At 41 feet, this dam is taller than 88% of dams nationwide.
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Location
| State | Colorado |
| County | Boulder |
| Nearest City | Longmont |
| River/Stream | St-os |
| Coordinates | 40.24744, -105.14507 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 41 ft |
| Dam Height | 37 ft |
| Dam Length | 2,400 ft |
| Year Completed | 1881 (145 years old) |
Storage & Hydraulics
| NID Storage | 4,613 acre-ft |
| Max Storage | 4,613 acre-ft |
| Normal Storage | 3,713 acre-ft |
| Surface Area | 178 acres |
| Max Discharge | 1,500 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | HIGHLAND DITCH COMPANY (WADE GONZALES) |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/24/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO01211 |
| Federal ID | CO01211 |
| More Info | State Dam Safety Program |