Big Lake Los Manzanos Dam is an earth dam located in Kerr County, Texas, built in 1968. It carries a Significant hazard potential classification.
Dam profile
NID height · 13 ft13 ft tall and 300 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 Big Lake Los Manzanos Dam
The primary purpose of Big Lake Los Manzanos 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 Fronie Shelton (private). It impounds the Johnson Creek near Ingram.
The dam stands 13 feet tall and stretches 300 feet across, creates a reservoir covering 13 acres, and has a maximum storage capacity of 189 acre-feet. Completed in 1968, 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 04/13/2009. That was over 17 years ago.
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Location
| State | Texas |
| County | Kerr |
| Nearest City | Ingram |
| River/Stream | Johnson Creek |
| Coordinates | 30.15730, -99.35375 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 300 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 189 acre-ft |
| Max Storage | 189 acre-ft |
| Normal Storage | 112 acre-ft |
| Surface Area | 13 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Fronie Shelton |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 04/13/2009 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | TX04863 |
| Federal ID | TX04863 |
| More Info | State Dam Safety Program |