Koa Lake Dam
Koa Lake Dam is an earth dam located in La Salle County, Texas, built in 1971. It carries a Significant hazard potential classification.
About Koa Lake Dam
The primary purpose of Koa Lake Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Jose Villarreal (private). It impounds the Tr-nueces River.
The dam stands 10 feet tall and stretches 882 feet across, creates a reservoir covering 14 acres, has a maximum storage capacity of 122 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1971, 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. The most recent inspection on record was 02/10/2016. That was over 10 years ago.
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Location
| State | Texas |
| County | La Salle |
| River/Stream | Tr-nueces River |
| Coordinates | 28.43193, -99.25194 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 882 ft |
| Year Completed | 1971 (55 years old) |
Storage & Hydraulics
| NID Storage | 122 acre-ft |
| Max Storage | 122 acre-ft |
| Normal Storage | 108 acre-ft |
| Surface Area | 14 acres |
| Drainage Area | 1 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | JOSE VILLARREAL |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not Rated |
| Last Inspection | 02/10/2016 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | TX04604 |
| Federal ID | TX04604 |
| More Info | State Dam Safety Program |