Sister Grove Creek Ws Scs Site 7 Dam
Sister Grove Creek Ws Scs Site 7 Dam is an earth dam located in Collin County, Texas, built in 1952. It carries a High hazard potential classification and has a unsatisfactory condition assessment.
About Sister Grove Creek Ws Scs Site 7 Dam
The primary purpose of Sister Grove Creek Ws Scs Site 7 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 Collin County;collin County Swcd (local government). It impounds the Tr-sister Grove Creek.
The dam stands 38 feet tall and stretches 1,460 feet across, creates a reservoir covering 15 acres, has a maximum storage capacity of 817 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1952, 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 unsatisfactory, indicating serious safety deficiencies exist that require immediate attention or remedial action. Notably, no emergency action plan is currently on file for this high-hazard dam. The most recent inspection on record was 12/08/2022.
At 38 feet, this dam is taller than 85% 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 |
| River/Stream | Tr-sister Grove Creek |
| Coordinates | 33.36631, -96.52550 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 38 ft |
| Dam Height | 38 ft |
| Dam Length | 1,460 ft |
| Year Completed | 1952 (74 years old) |
Storage & Hydraulics
| NID Storage | 817 acre-ft |
| Max Storage | 817 acre-ft |
| Normal Storage | 114 acre-ft |
| Surface Area | 15 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 2 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | COLLIN COUNTY;COLLIN COUNTY SWCD |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 12/08/2022 |
| Emergency Action Plan | No |
Identifiers
| NID ID | TX04257 |
| Federal ID | TX04257 |
| More Info | State Dam Safety Program |