Monument #1
Monument #1 is an earth dam located in Mesa County, Colorado, built in 1960. It carries a Significant hazard potential classification and has a fair condition assessment.
About Monument #1
The primary purpose of Monument #1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Ute Water Conservancy District (private). It impounds the Monument Creek near Collbran.
The dam stands 35 feet tall and stretches 500 feet across, creates a reservoir covering 40 acres, has a maximum storage capacity of 760 acre-feet, and collects water from a drainage area of 5 square miles. Completed in 1960, the structure is well into its service life at over 50 years 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 07/20/2022.
At 35 feet, this dam is taller than 82% of dams nationwide.
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Location
| State | Colorado |
| County | Mesa |
| Nearest City | Collbran |
| River/Stream | Monument Creek |
| Coordinates | 39.10834, -107.75057 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Height | 32 ft |
| Dam Length | 500 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 760 acre-ft |
| Max Storage | 760 acre-ft |
| Normal Storage | 572 acre-ft |
| Surface Area | 40 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 1,750 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | UTE WATER CONSERVANCY DISTRICT |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 07/20/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO01042 |
| Federal ID | CO01042 |
| More Info | State Dam Safety Program |