Lower Dresser No. 4 Dam
Lower Dresser No. 4 Dam is an earth dam located in Washington County, Missouri, built in 1975. It carries a High hazard potential classification.
About Lower Dresser No. 4 Dam
Lower Dresser No. 4 Dam is a dam in Washington, Missouri. The dam is owned by Mi Drilling Fluids Compa (private). It impounds the Tributar To Mill Creek near Tiff.
The dam stands 31 feet tall and stretches 1,010 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 116 acre-feet, and collects water from a drainage area of 600 square miles. Completed in 1975, 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. The most recent inspection on record was 03/26/1979. That was 47 years ago — unusually long for a high-hazard dam, which typically requires more frequent inspections.
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 | Tiff |
| River/Stream | Tributar To Mill Creek |
| Coordinates | 38.01821, -90.67854 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 31 ft |
| Dam Height | 31 ft |
| Dam Length | 1,010 ft |
| Year Completed | 1975 (51 years old) |
Storage & Hydraulics
| NID Storage | 116 acre-ft |
| Max Storage | 116 acre-ft |
| Normal Storage | 103 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 600 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | MI DRILLING FLUIDS COMPA |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not Rated |
| Last Inspection | 03/26/1979 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO31123 |
| Federal ID | MO31123 |
| More Info | State Dam Safety Program |