Donnelly #1 is an earth dam located in Delta County, Colorado, built in 1955. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 25 ft25 ft tall and 270 ft long, taller than 50% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Donnelly #1
The primary purpose of Donnelly #1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Surface Creek Ditch & Reservoir Co. (waibel, Keith (private). It impounds the Kiser Creek-tr near Cedaredge.
The dam stands 25 feet tall and stretches 270 feet across, creates a reservoir covering 29 acres, and has a maximum storage capacity of 428 acre-feet. Completed in 1955, 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 08/10/2021.
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Location
| State | Colorado |
| County | Delta |
| Nearest City | Cedaredge |
| River/Stream | Kiser Creek-tr |
| Coordinates | 39.03357, -107.94303 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 20 ft |
| Dam Length | 270 ft |
| Year Completed | 1955 (71 years old) |
Storage & Hydraulics
| NID Storage | 428 acre-ft |
| Max Storage | 428 acre-ft |
| Normal Storage | 283 acre-ft |
| Surface Area | 29 acres |
| Max Discharge | 588 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Surface Creek Ditch & Reservoir Co. (waibel, Keith |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 08/10/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO00568 |
| Federal ID | CO00568 |
| More Info | State Dam Safety Program |