Pinson Gravel Company Dam
Pinson Gravel Company Dam is an other dam located in Washington County, Missouri, built in 1973. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Pinson Gravel Company Dam
The primary purpose of Pinson Gravel Company Dam is tailings. Tailings dams contain waste material from mining operations — typically a slurry of finely ground rock left over after valuable minerals have been extracted. These structures require ongoing monitoring because tailings can contain heavy metals and other contaminants. The dam is owned by Sonny's Llc (private). It impounds the Tr-old Mines Cr near Cruise Mill.
The dam stands 79 feet tall and stretches 3,234 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 875 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1973, 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 12/01/2022.
At 79 feet, this dam is taller than 97% 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 | Cruise Mill |
| River/Stream | Tr-old Mines Cr |
| Coordinates | 38.07601, -90.73530 |
Physical Characteristics
| Dam Type | Other |
| NID Height | 79 ft |
| Dam Height | 79 ft |
| Dam Length | 3,234 ft |
| Year Completed | 1973 (53 years old) |
Storage & Hydraulics
| NID Storage | 875 acre-ft |
| Max Storage | 875 acre-ft |
| Normal Storage | 760 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 5,636 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Tailings |
| Owner | SONNY'S LLC |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 12/01/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MO31155 |
| Federal ID | MO31155 |
| More Info | State Dam Safety Program |