East Fork Above Lavon Ws Scs Site 1a Dam
East Fork Above Lavon Ws Scs Site 1a Dam is an earth dam located in Collin County, Texas, built in 1957. It carries a High hazard potential classification.
About East Fork Above Lavon Ws Scs Site 1a Dam
The primary purpose of East Fork Above Lavon Ws Scs Site 1a 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 City Of Mckinney;collin County;collin County Swcd (local government). It impounds the Tr-wilson Creek near Mckinney.
The dam stands 54 feet tall and stretches 1,200 feet across, creates a reservoir covering 13 acres, has a maximum storage capacity of 842 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1957, 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 09/04/2024.
At 54 feet, this dam is taller than 94% 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 | Collin |
| Nearest City | Mckinney |
| River/Stream | Tr-wilson Creek |
| Coordinates | 33.22822, -96.71961 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 54 ft |
| Dam Height | 54 ft |
| Dam Length | 1,200 ft |
| Year Completed | 1957 (69 years old) |
Storage & Hydraulics
| NID Storage | 842 acre-ft |
| Max Storage | 842 acre-ft |
| Normal Storage | 185 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 9,834 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | CITY OF MCKINNEY;COLLIN COUNTY;COLLIN COUNTY SWCD |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Not Rated |
| Last Inspection | 09/04/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | TX01118 |
| Federal ID | TX01118 |
| More Info | State Dam Safety Program |