Ogden City - Sullivan Hollow
Ogden City - Sullivan Hollow is an earth dam located in Weber County, Utah, built in 1974. It carries a High hazard potential classification and has a fair condition assessment.
About Ogden City - Sullivan Hollow
The primary purpose of Ogden City - Sullivan Hollow is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Ogden City Engineering Department (local government). It impounds the Sullivan Hollow near Ogden.
The dam stands 18 feet tall and stretches 405 feet across, has a maximum storage capacity of 21 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1974, the structure is well into its service life at over 50 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 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 09/07/2022.
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 Utah 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 | Utah |
| County | Weber |
| Nearest City | Ogden |
| River/Stream | Sullivan Hollow |
| Coordinates | 41.21027, -111.96046 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Length | 405 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 21 acre-ft |
| Max Storage | 21 acre-ft |
| Normal Storage | 19 acre-ft |
| Drainage Area | 4 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | OGDEN CITY ENGINEERING DEPARTMENT |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 09/07/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | UT00505 |
| Federal ID | UT00505 |
| More Info | State Dam Safety Program |