Johnson Dam is an earth dam located in Rappahannock County, Virginia. It carries a Undetermined hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 200 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 Johnson Dam
The primary purpose of Johnson Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Shirley Williams (private). It impounds the Thumb Run.
The dam stands 20 feet tall and stretches 200 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 53 acre-feet, and collects water from a drainage area of 2 square miles.
An emergency action plan is in place for this dam.
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Location
| State | Virginia |
| County | Rappahannock |
| River/Stream | Thumb Run |
| Coordinates | 38.71510, -78.00490 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 200 ft |
Storage & Hydraulics
| NID Storage | 53 acre-ft |
| Max Storage | 53 acre-ft |
| Normal Storage | 44 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 2 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | Shirley Williams |
| Owner Type | Private |
| Hazard Classification | Undetermined |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | VA061004 |
| Federal ID | VA061004 |
| More Info | State Dam Safety Program |