Logan No. 3 is a concrete dam located in Cache County, Utah, built in 1924. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 32 ft32 ft tall and 108 ft long, taller than 74% 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 concrete gravity section and the water level is illustrative.
About Logan No. 3
The primary purpose of Logan No. 3 is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. The dam is owned by Logan, City of (local government). It impounds the Logan River near Logan.
The dam stands 32 feet tall and stretches 108 feet across, creates a reservoir covering 14 acres, and has a storage capacity of 40 acre-feet. Completed in 1924, the structure is over a century old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected 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. The most recent inspection on record was 10/13/2022.
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Location
| State | Utah |
| County | Cache |
| Nearest City | Logan |
| River/Stream | Logan River |
| Coordinates | 41.75310, -111.72320 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 108 ft |
| Year Completed | 1924 (102 years old) |
Storage & Hydraulics
| NID Storage | 40 acre-ft |
| Normal Storage | 40 acre-ft |
| Surface Area | 14 acres |
| Max Discharge | 2,500 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Logan, City of |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 10/13/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | UT00310 |
| Federal ID | UT00310 |
| More Info | State Dam Safety Program |