Norman Dam
Norman Dam is an earth dam located in Cleveland County, Oklahoma, built in 1964. It carries a High hazard potential classification.
About Norman Dam
The primary purpose of Norman Dam 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 Bureau Of Reclamation (federal). It impounds the Little River near Harlo.
The dam stands 144 feet tall and stretches 7,260 feet across, creates a reservoir covering 6,070 acres, has a maximum storage capacity of 367,467 acre-feet, and collects water from a drainage area of 257 square miles. Completed in 1964, 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. An emergency action plan is in place for this dam. The most recent inspection on record was 04/29/2021.
At 144 feet, this dam is taller than 99% of all dams in the United States.
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 Oklahoma 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 | Oklahoma |
| County | Cleveland |
| Nearest City | Harlo |
| River/Stream | Little River |
| Coordinates | 35.22110, -97.21920 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 144 ft |
| Dam Height | 144 ft |
| Dam Length | 7,260 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 367,467 acre-ft |
| Max Storage | 367,467 acre-ft |
| Normal Storage | 119,600 acre-ft |
| Surface Area | 6,070 acres |
| Drainage Area | 257 sq mi |
| Max Discharge | 2,840 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | BUREAU OF RECLAMATION |
| Owner Type | Federal |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 04/29/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | OK02504 |
| Federal ID | OK02504 |
| More Info | State Dam Safety Program |