Lake Thunderbird Lower Dam
Lake Thunderbird Lower Dam is an earth dam located in Callaway County, Missouri, built in 1968. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Lake Thunderbird Lower Dam
The primary purpose of Lake Thunderbird Lower Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Thunderbird Lake Inc (private). It impounds the Tr-auxvasse Creek near Portland.
The dam stands 68 feet tall and stretches 400 feet across, creates a reservoir covering 20 acres, has a maximum storage capacity of 612 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1968, the structure is well into its service life at over 50 years 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 01/22/2020.
At 68 feet, this dam is taller than 96% of all dams in the United States.
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Location
| State | Missouri |
| County | Callaway |
| Nearest City | Portland |
| River/Stream | Tr-auxvasse Creek |
| Coordinates | 38.80716, -91.80849 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 68 ft |
| Dam Height | 68 ft |
| Dam Length | 400 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 612 acre-ft |
| Max Storage | 612 acre-ft |
| Normal Storage | 612 acre-ft |
| Surface Area | 20 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,056 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | THUNDERBIRD LAKE INC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 01/22/2020 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MO11426 |
| Federal ID | MO11426 |
| More Info | State Dam Safety Program |