Purola Lake Dam
Purola Lake Dam is an earth dam located in Hays County, Texas, built in 1967. It carries a Significant hazard potential classification.
About Purola Lake Dam
The primary purpose of Purola 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 William Keyes (private). It impounds the Tr-pedernales River near Austin.
The dam stands 37 feet tall and stretches 699 feet across, creates a reservoir covering 13 acres, has a maximum storage capacity of 237 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1967, 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 11/02/2009. That was over 16 years ago.
At 37 feet, this dam is taller than 84% of dams nationwide.
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Location
| State | Texas |
| County | Hays |
| Nearest City | Austin |
| River/Stream | Tr-pedernales River |
| Coordinates | 30.28665, -98.16525 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 37 ft |
| Dam Height | 37 ft |
| Dam Length | 699 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 237 acre-ft |
| Max Storage | 237 acre-ft |
| Normal Storage | 156 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 1,440 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | WILLIAM KEYES |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not Rated |
| Last Inspection | 11/02/2009 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | TX04660 |
| Federal ID | TX04660 |
| More Info | State Dam Safety Program |