Newt Graham Lock And Dam
Newt Graham Lock And Dam is a concrete dam located in Wagoner County, Oklahoma, built in 1970. It carries a Significant hazard potential classification.
About Newt Graham Lock And Dam
The primary purpose of Newt Graham Lock And Dam is navigation. The dam maintains water levels sufficient for boat and barge traffic, supporting commercial or recreational navigation on the waterway. The dam is owned by Usace - Tulsa District (federal). It impounds the Verdigris River near Okay.
The dam stands 48 feet tall and stretches 7,367 feet across, creates a reservoir covering 1,490 acres, has a maximum storage capacity of 23,500 acre-feet, and collects water from a drainage area of 2,034 square miles. Completed in 1970, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. An emergency action plan is in place for this dam. The most recent inspection on record was 05/28/2025.
At 48 feet, this dam is taller than 92% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Oklahoma |
| County | Wagoner |
| Nearest City | Okay |
| River/Stream | Verdigris River |
| Coordinates | 36.05863, -95.53767 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 48 ft |
| Dam Height | 48 ft |
| Dam Length | 7,367 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 23,500 acre-ft |
| Max Storage | 23,500 acre-ft |
| Normal Storage | 23,500 acre-ft |
| Surface Area | 1,490 acres |
| Drainage Area | 2,034 sq mi |
| Max Discharge | 155,000 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Navigation |
| Owner | USACE - Tulsa District |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Not Available |
| Last Inspection | 05/28/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | OK10302 |
| Federal ID | OK10302 |
| More Info | State Dam Safety Program |