Julesburg #1a
Julesburg #1a is an earth dam located in Logan County, Colorado, built in 1910. It carries a High hazard potential classification and has a unsatisfactory condition assessment.
About Julesburg #1a
The primary purpose of Julesburg #1a is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Julesburg Irrigation District (larry Frame) (private). It impounds the Cottonwood Creek-tr near Dorsey.
The dam stands 18 feet tall and stretches 735 feet across, creates a reservoir covering 1,578 acres, has a maximum storage capacity of 38,600 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 1910, the structure is over a century old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated unsatisfactory, indicating serious safety deficiencies exist that require immediate attention or remedial action. An emergency action plan is in place for this dam. The most recent inspection on record was 05/18/2022.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Colorado dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Colorado |
| County | Logan |
| Nearest City | Dorsey |
| River/Stream | Cottonwood Creek-tr |
| Coordinates | 40.91962, -102.65635 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 735 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 38,600 acre-ft |
| Max Storage | 38,600 acre-ft |
| Normal Storage | 16,817 acre-ft |
| Surface Area | 1,578 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 2,592 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | JULESBURG IRRIGATION DISTRICT (LARRY FRAME) |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 05/18/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO02780 |
| Federal ID | CO02780 |
| More Info | State Dam Safety Program |