Upper Dike
Upper Dike is an earth dam located in Bonneville County, Idaho, built in 1982. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Upper Dike
The primary purpose of Upper Dike 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 City Of Idaho Falls (local government). It impounds the Snake River near Idaho Falls, Id.
The dam stands 12 feet tall and stretches 3,000 feet across, creates a reservoir covering 100 acres, has a maximum storage capacity of 1,230 acre-feet, and collects water from a drainage area of 9,800 square miles. Completed in 1982, the structure is 44 years 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 10/20/2022.
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 Idaho 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 | Idaho |
| County | Bonneville |
| Nearest City | Idaho Falls, Id |
| River/Stream | Snake River |
| Coordinates | 43.55361, -112.05165 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 3,000 ft |
| Year Completed | 1982 (44 years old) |
Storage & Hydraulics
| NID Storage | 1,230 acre-ft |
| Max Storage | 1,230 acre-ft |
| Normal Storage | 800 acre-ft |
| Surface Area | 100 acres |
| Drainage Area | 9,800 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | City of Idaho Falls |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/20/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ID00167 |
| Federal ID | ID00167S002 |
| More Info | State Dam Safety Program |