Groff Upper Dam is an earth dam located in Miller County, Missouri, built in 1959. It carries a Low hazard potential classification.
Dam profile
NID height · 27 ft27 ft tall, taller than 59% 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 Groff Upper Dam
The primary purpose of Groff Upper Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Robert Groff (private). It impounds the Tr Tavern Creek near Iberia.
The dam stands 27 feet tall, creates a reservoir covering 4 acres, has a maximum storage capacity of 58 acre-feet, and collects water from a drainage area of 77 square miles. Completed in 1959, 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.
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Location
| State | Missouri |
| County | Miller |
| Nearest City | Iberia |
| River/Stream | Tr Tavern Creek |
| Coordinates | 38.08500, -92.27028 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Year Completed | 1959 (67 years old) |
Storage & Hydraulics
| NID Storage | 58 acre-ft |
| Max Storage | 58 acre-ft |
| Normal Storage | 31 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 77 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | Robert Groff |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO30140 |
| Federal ID | MO30140 |
| More Info | State Dam Safety Program |