Purola Lake Dam is an earth dam located in Hays County, Texas, built in 1967. It carries a Significant hazard potential classification.
Dam profile
NID height · 37 ft37 ft tall and 699 ft long, taller than 83% of U.S. dams with a recorded height. 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 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 83% 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 assessed |
| Last Inspection | 11/02/2009 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | TX04660 |
| Federal ID | TX04660 |
| More Info | State Dam Safety Program |