Howell Mine Dam
Howell Mine Dam is an earth dam located in Washington County, Missouri, built in 1954. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Howell Mine Dam
The primary purpose of Howell Mine Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Baker-hughes-intec (private). It impounds the Ishmael Br Hazel Creek near Shirley.
The dam stands 58 feet tall and stretches 1,000 feet across, creates a reservoir covering 71 acres, has a maximum storage capacity of 1,460 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1954, the structure is well into its service life at over 50 years old.
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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 05/26/2021.
At 58 feet, this dam is taller than 95% of all dams in the United States.
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 Missouri 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 | Missouri |
| County | Washington |
| Nearest City | Shirley |
| River/Stream | Ishmael Br Hazel Creek |
| Coordinates | 37.83356, -90.95051 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 58 ft |
| Dam Height | 58 ft |
| Dam Length | 1,000 ft |
| Year Completed | 1954 (72 years old) |
Storage & Hydraulics
| NID Storage | 1,460 acre-ft |
| Max Storage | 1,460 acre-ft |
| Normal Storage | 1,460 acre-ft |
| Surface Area | 71 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 5,800 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | BAKER-HUGHES-INTEC |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/26/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MO30700 |
| Federal ID | MO30700 |
| More Info | State Dam Safety Program |