Jim Merrigan Structure Dam
Jim Merrigan Structure Dam is an earth dam located in Gentry County, Missouri, built in 1973. It carries a Low hazard potential classification.
About Jim Merrigan Structure Dam
The primary purpose of Jim Merrigan Structure Dam is grade stabilization. Grade stabilization dams prevent erosion by reducing the slope and velocity of water flowing through a channel. They're commonly used to stop gullies from deepening and to protect downstream land and infrastructure. The dam is owned by James Merrigan (private). It impounds the Tr-white Cloud Creek near Bolckow.
The dam stands 21 feet tall and stretches 600 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 123 acre-feet, and collects water from a drainage area of 166 square miles. Completed in 1973, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
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Location
| State | Missouri |
| County | Gentry |
| Nearest City | Bolckow |
| River/Stream | Tr-white Cloud Creek |
| Coordinates | 40.27291, -94.59852 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 20 ft |
| Dam Length | 600 ft |
| Year Completed | 1973 (53 years old) |
Storage & Hydraulics
| NID Storage | 123 acre-ft |
| Max Storage | 123 acre-ft |
| Normal Storage | 73 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 166 sq mi |
| Max Discharge | 400 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | JAMES MERRIGAN |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO50403 |
| Federal ID | MO50403 |
| More Info | State Dam Safety Program |