Blanding City No. 3
Blanding City No. 3 is an earth dam located in San Juan County, Utah, built in 1961. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Blanding City No. 3
The primary purpose of Blanding City No. 3 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Blanding City (local government). It impounds the Johnson Creek - Offstream near Blanding.
The dam stands 47 feet tall and stretches 990 feet across, has a maximum storage capacity of 320 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1961, 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 09/27/2023.
At 47 feet, this dam is taller than 92% of dams nationwide.
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 | San Juan |
| Nearest City | Blanding |
| River/Stream | Johnson Creek - Offstream |
| Coordinates | 37.67184, -109.48734 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 47 ft |
| Dam Length | 990 ft |
| Year Completed | 1961 (65 years old) |
Storage & Hydraulics
| NID Storage | 320 acre-ft |
| Max Storage | 320 acre-ft |
| Normal Storage | 250 acre-ft |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | BLANDING CITY |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/27/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | UT00042 |
| Federal ID | UT00042 |
| More Info | State Dam Safety Program |