Sunnyside Cogeneration Reservoir is an earth dam located in Carbon County, Utah, built in 1992. It carries a Significant hazard potential classification.
Dam profile
NID height · 35 ft35 ft tall and 2,280 ft long, taller than 80% 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 Sunnyside Cogeneration Reservoir
The primary purpose of Sunnyside Cogeneration Reservoir 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 Sunnyside Cogeneration Associates (private). It impounds the Off Channel Site near East Carbon City.
The dam stands 35 feet tall and stretches 2,280 feet across, and has a storage capacity of 123 acre-feet. Completed in 1992, the structure is 34 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. An emergency action plan is in place for this dam. The most recent inspection on record was 05/09/2023.
At 35 feet, this dam is taller than 80% of dams nationwide.
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Location
| State | Utah |
| County | Carbon |
| Nearest City | East Carbon City |
| River/Stream | Off Channel Site |
| Coordinates | 39.54712, -110.39504 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Length | 2,280 ft |
| Year Completed | 1992 (34 years old) |
Storage & Hydraulics
| NID Storage | 123 acre-ft |
| Normal Storage | 123 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Sunnyside Cogeneration Associates |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 05/09/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | UT00733 |
| Federal ID | UT00733 |
| More Info | State Dam Safety Program |