Jefferson County Lake #1 Dam is a dam located in Jefferson County, Missouri, built in 1991. It carries a Significant hazard potential classification.
Dam profile
NID height · 24 ft24 ft tall. 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 Jefferson County Lake #1 Dam
The primary purpose of Jefferson County Lake #1 Dam is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is local government-owned.
The dam stands 24 feet tall, creates a reservoir covering 2 acres, and has a maximum storage capacity of 26 acre-feet. Completed in 1991, the structure is 35 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life.
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Location
| State | Missouri |
| County | Jefferson |
| Coordinates | 38.26761, -90.55275 |
Physical Characteristics
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Year Completed | 1991 (35 years old) |
Storage & Hydraulics
| NID Storage | 26 acre-ft |
| Max Storage | 26 acre-ft |
| Normal Storage | 16 acre-ft |
| Surface Area | 2 acres |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO31985 |
| Federal ID | MO31985 |
| More Info | State Dam Safety Program |