East Pre-sedimentation Basin
East Pre-sedimentation Basin is an earth dam located in Wagoner County, Oklahoma, built in 2012. It carries a High hazard potential classification and has a satisfactory condition assessment.
About East Pre-sedimentation Basin
The primary purpose of East Pre-sedimentation Basin is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Broken Arrow Municipal Authority (local government). It impounds the Verdigris River-old Channel near Broken Arrow.
The dam stands 28 feet tall and stretches 3,600 feet across, creates a reservoir covering 20 acres, has a maximum storage capacity of 342 acre-feet, and collects water from a drainage area of 20 square miles. Completed in 2012, the structure is relatively new.
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 11/29/2022.
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 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 | Wagoner |
| Nearest City | Broken Arrow |
| River/Stream | Verdigris River-old Channel |
| Coordinates | 36.06889, -95.57611 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 3,600 ft |
| Year Completed | 2012 (14 years old) |
Storage & Hydraulics
| NID Storage | 342 acre-ft |
| Max Storage | 342 acre-ft |
| Normal Storage | 266 acre-ft |
| Surface Area | 20 acres |
| Drainage Area | 20 sq mi |
| Max Discharge | 20 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | BROKEN ARROW MUNICIPAL AUTHORITY |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/29/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | OK30398 |
| Federal ID | OK30398 |
| More Info | State Dam Safety Program |