Las Colinas Reservoir No 7 Dam is an earth dam located in Dallas County, Texas, built in 1963. It carries a Significant hazard potential classification.
Dam profile
NID height · 16 ft16 ft tall and 985 ft long. 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 Las Colinas Reservoir No 7 Dam
The primary purpose of Las Colinas Reservoir No 7 Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Las Colinas Country Club (private). It impounds the Tr-elm Fork Trinity River near Irving.
The dam stands 16 feet tall and stretches 985 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 144 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1963, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. An emergency action plan is in place for this dam. The most recent inspection on record was 05/21/2024.
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Location
| State | Texas |
| County | Dallas |
| Nearest City | Irving |
| River/Stream | Tr-elm Fork Trinity River |
| Coordinates | 32.85953, -96.94443 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 985 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 144 acre-ft |
| Max Storage | 144 acre-ft |
| Normal Storage | 99 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 582 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Las Colinas Country Club |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 05/21/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | TX04378 |
| Federal ID | TX04378 |
| More Info | State Dam Safety Program |