Lake Tonkawa Dam
Lake Tonkawa Dam is an earth dam located in Leon County, Texas, built in 1971. It carries a High hazard potential classification.
About Lake Tonkawa Dam
The primary purpose of Lake Tonkawa Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Property Owners Association Of Hilltop Lakes Inc (private). It impounds the Running Creek near Normangee.
The dam stands 47 feet tall and stretches 700 feet across, creates a reservoir covering 75 acres, has a maximum storage capacity of 1,900 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1971, 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 11/05/2018. That was 7 years ago, which is on the longer end for a high-hazard structure.
At 47 feet, this dam is taller than 92% of dams nationwide.
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 | Leon |
| Nearest City | Normangee |
| River/Stream | Running Creek |
| Coordinates | 31.06218, -96.19864 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 47 ft |
| Dam Height | 42 ft |
| Dam Length | 700 ft |
| Year Completed | 1971 (55 years old) |
Storage & Hydraulics
| NID Storage | 1,900 acre-ft |
| Max Storage | 1,900 acre-ft |
| Normal Storage | 976 acre-ft |
| Surface Area | 75 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 1,782 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | PROPERTY OWNERS ASSOCIATION OF HILLTOP LAKES INC |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not Rated |
| Last Inspection | 11/05/2018 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | TX02425 |
| Federal ID | TX02425 |
| More Info | State Dam Safety Program |