Boynton Lake Dam
Boynton Lake Dam is an earth dam located in Dimmit County, Texas, built in 1914. It carries a High hazard potential classification and has a poor condition assessment.
About Boynton Lake Dam
The primary purpose of Boynton Lake Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Zavala Dimmit Co Wid 1 (local government). It impounds the Nueces River.
The dam stands 27 feet tall and stretches 500 feet across, and has a maximum storage capacity of 1,424 acre-feet. Completed in 1914, the structure is over a century 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. Notably, no emergency action plan is currently on file for this high-hazard dam. The most recent inspection on record was 11/07/2023.
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 Texas 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 | Texas |
| County | Dimmit |
| River/Stream | Nueces River |
| Coordinates | 28.62314, -99.78766 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Dam Length | 500 ft |
| Year Completed | 1914 (112 years old) |
Storage & Hydraulics
| NID Storage | 1,424 acre-ft |
| Max Storage | 1,424 acre-ft |
| Normal Storage | 771 acre-ft |
| Max Discharge | 18,000 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | ZAVALA DIMMIT CO WID 1 |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Poor |
| Last Inspection | 11/07/2023 |
| Emergency Action Plan | No |
Identifiers
| NID ID | TX02331 |
| Federal ID | TX02331 |
| More Info | State Dam Safety Program |