Jonsson Lake Dam is an earth dam located in Henderson County, Texas, built in 1950. It carries a High hazard potential classification.
Dam profile
NID height · 29 ft29 ft tall and 750 ft long, taller than 65% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Jonsson Lake Dam
The primary purpose of Jonsson Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Circle Ten Council Bsa (private). It impounds the Anding Branch.
The dam stands 29 feet tall and stretches 750 feet across, creates a reservoir covering 197 acres, has a maximum storage capacity of 2,560 acre-feet, and collects water from a drainage area of 5 square miles. Completed in 1950, the structure is well-established, with more than 75 years of service.
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 01/24/2024.
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 | Henderson |
| River/Stream | Anding Branch |
| Coordinates | 32.06736, -95.89558 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 750 ft |
| Year Completed | 1950 (76 years old) |
Storage & Hydraulics
| NID Storage | 2,560 acre-ft |
| Max Storage | 2,560 acre-ft |
| Normal Storage | 770 acre-ft |
| Surface Area | 197 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 2 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Circle Ten Council Bsa |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not assessed |
| Last Inspection | 01/24/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | TX00200 |
| Federal ID | TX00200 |
| More Info | State Dam Safety Program |