East Fork Above Lavon Ws Scs Site 20a Dam is an earth dam located in Grayson County, Texas, built in 1966. It carries a High hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 44 ft44 ft tall and 2,730 ft long, taller than 89% 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 East Fork Above Lavon Ws Scs Site 20a Dam
The primary purpose of East Fork Above Lavon Ws Scs Site 20a Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Grayson County;upper Elm Red Swcd (local government). It impounds the Tr-east Fork Trinity River.
The dam stands 44 feet tall and stretches 2,730 feet across, creates a reservoir covering 41 acres, has a maximum storage capacity of 3,458 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 1966, 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. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 11/09/2020.
At 44 feet, this dam is taller than 89% 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 | Grayson |
| River/Stream | Tr-east Fork Trinity River |
| Coordinates | 33.48240, -96.69858 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 44 ft |
| Dam Height | 44 ft |
| Dam Length | 2,730 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 3,458 acre-ft |
| Max Storage | 3,458 acre-ft |
| Normal Storage | 200 acre-ft |
| Surface Area | 41 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 2,865 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Grayson County;upper Elm Red Swcd |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 11/09/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | TX02113 |
| Federal ID | TX02113 |
| More Info | State Dam Safety Program |