Montague Lake Dam
Montague Lake Dam is an earth dam located in Bandera County, Texas, built in 1947. It carries a High hazard potential classification.
About Montague Lake Dam
The primary purpose of Montague 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 Sarah Shaw (private). It impounds the Montague Hollow near Bandera.
The dam stands 41 feet tall and stretches 985 feet across, creates a reservoir covering 36 acres, has a maximum storage capacity of 900 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1947, the structure is well-established, with more than 75 years of service.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. An emergency action plan is in place for this dam. The most recent inspection on record was 02/21/2019. That was 7 years ago, which is on the longer end for a high-hazard structure.
At 41 feet, this dam is taller than 88% of dams nationwide.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Texas dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Texas |
| County | Bandera |
| Nearest City | Bandera |
| River/Stream | Montague Hollow |
| Coordinates | 29.76074, -99.12559 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 41 ft |
| Dam Height | 41 ft |
| Dam Length | 985 ft |
| Year Completed | 1947 (79 years old) |
Storage & Hydraulics
| NID Storage | 900 acre-ft |
| Max Storage | 900 acre-ft |
| Normal Storage | 500 acre-ft |
| Surface Area | 36 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 3,067 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | SARAH SHAW |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not Rated |
| Last Inspection | 02/21/2019 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | TX02917 |
| Federal ID | TX02917 |
| More Info | State Dam Safety Program |