Rio Vista Dam is a concrete dam located in Hays County, Texas, built in 1904. It carries a Low hazard potential classification.
Dam profile
NID height · 8 ft8 ft tall and 100 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Rio Vista Dam
The primary purpose of Rio Vista Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City of San Marcos (local government). It impounds the San Marcos River.
The dam stands 8 feet tall and stretches 100 feet across, creates a reservoir covering 16 acres, and has a maximum storage capacity of 61 acre-feet. Completed in 1904, the structure is over a century old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. An emergency action plan is in place for this dam. The most recent inspection on record was 05/16/2006. That was over 20 years ago.
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Location
| State | Texas |
| County | Hays |
| River/Stream | San Marcos River |
| Coordinates | 29.87869, -97.93270 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 100 ft |
| Year Completed | 1904 (122 years old) |
Storage & Hydraulics
| NID Storage | 61 acre-ft |
| Max Storage | 61 acre-ft |
| Normal Storage | 61 acre-ft |
| Surface Area | 16 acres |
| Spillway Type | None |
Ownership & Safety
| Purpose | Recreation |
| Owner | City of San Marcos |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 05/16/2006 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | TX06886 |
| Federal ID | TX06886 |
| More Info | State Dam Safety Program |