Mining Incidents

Stamper UndergroundMetal/Nonmetal

Platte City, Platte County, MO · NonProducing
MSHA Mine ID: 2302232
Fatalities
1
Total incidents
23
Years on record
2003–2025
Latest incident
May 2025

Fatalities at this mine

1 recorded
Struck against stationary object

Employee was driving a Superior Bowen's (Contractor) water truck down the slope into mine and lost control, impacting a dome out (located at 2N- 0 E/W) at the bottom of slope resulting in ramping up of truck over and through to other side.

Reportable incidents

22 on file (excluding fatalities above)

2025 · 1 incident

Accident type, without injuries

Employees arrived for the shift to find a backhoe on fire. Cause of fire was determined to be a lightning strike.

2024 · 1 incident

Accident type, without injuries

The mine operator has not yet determined the conditions contributing to the fall of ground.

2020 · 3 incidents

Absorption of radiations, caustics, toxic and noxious substances

Taking hose off of packer while pressure was still up. Hose disconnected and hit employee in face blowing employee's safety glasses off causing chemical grout to blow into both eyes.

Struck by falling object

The employee was loading a shot underground when material fell from the working face, striking the employee.

Over-exertion (Not Elsewhere Classified)

An employee was assisting with the removal of a guard and lost balance, the injured employee attempted to stabilize the co-worker and injured EE's bicep in the process.

2018 · 1 incident

Fall from machine

Employee was performing maintenance on a crusher. A chain used during the work shifted, startling the employee causing EE to lose balance and fall. Impact of the fall resulted in three stitches to EE's elbow.

2017 · 2 incidents

Accident type, without injuries

A record rainfall of 6.14"", the largest amount of rain in one day since the construction of the Stamper Mine portal, resulted in the mine's intake lake releasing water. Water traveled down the slope and into a localized area of the mine. We do not believe that this event is ""an unplanned inundation of a mine by a liquid"" and are submitting the 7000-1 at MSHA's direction.

Contact with heat

Employee was assisting with the clean-up of a conveyor when EE reported EE felt hot and dizzy. Employee cooled off in air conditioning and drank some water. After resting for around 30 minutes employee was still complaining so emergency services were contacted. EMS transported employee to an emergency room where EE received IV fluids and was released to full duty the same day.

2009 · 1 incident

Struck by... (Not Elsewhere Classified)

EE was helping two other employees tension cable bolts using a hydraulic tensioner. The cable was bent and had bound inside the tensioner. A 4 lb hammer was being used to the knock down on the top of the tensioner as EE pulled downward on the tensioner handles. On the 3rd or 4th hit, the hammer deflected off and struck the employees finger.

2006 · 1 incident

Struck by falling object

Employee was loading anfo into one of the top holes of a heading being loaded. He was trying to insert the hose further into the hole by wiggiling it. While doing this the hose became caught. As he tried to free the hose he knocked a rock loose which fell and strugk his left forearm. The cut required stitches.

2005 · 2 incidents

Caught in, under or between a moving and a stationary object

Employee was exiting his Toro piece of mobile and caught his left hand pointer finger in the door. The pinching action resulted in a laceration that required 7 stitches.

Caught in, under or between a moving and a stationary object

The employee was performing maintenance on pins that connect a tilt cylinder. The equipment shifted and pinched his left hand ring finger from the 2nd knuckle out.

2004 · 8 incidents

Struck against stationary object

EE WAS ANFOING A ROOM, WAS SWITCHING SIDES TO ANFO THE OTHER. IN THE PROCESS EE WAS WALKING BACKWARDS PULLING HOS, TRIPPED OVER A ROCK THAT HAD BEEN SCALED DOWN.

Struck by... (Not Elsewhere Classified)

HE WAS CUTTING OFF ANGLE IRON WITH A CUT OFF SAW WHEN SPARKS BOUNCED OFF GUARD COMING UNDER SAFETY GLASSES HITTING RIGHT EYE.

Struck by falling object

MINER WAS INSTALLING 8' X 20' METAL SCREENS VERTICALLY ON 20' RIB. SCREEN PULLED LOOSE AND FELL APPROX 2' STRIKING HIM ON THE HAND.

Accident type, without injuries

SHOTCRETE FELL ONTO THE INTERSECTION OF CONVEYORS S-2 & S-3, A PIECE FELL APPROX. 15' X 30'X 6' THICK. DAMAGE WAS EXTENSIVE TO HEADSECTION OF S-2. THIS FALL TOOK PLACE OUTSIDE OF NORMAL WORKHOURS, NO ONE WAS IN THE MINE AT THE TIME. THE FALL WAS DISCOVERED ON MONDAY MORNING. NO ONE WAS ALLOWED TO ENTER UNTIL THE AREA WAS SECURE.

Struck by falling object

EE WAS LOADING A ROOM THAT HAD BEEN MECHANICALLY SEALED AS WELL AS HAND SEALED. A ROCK THE SIZE OF A BASKETBALL CAME LOOSE FROM THE FACE AS HE WAS LOADING AND STRUCK HIS HAND. IT LEFT A RED MARK BUT HE DID NOT REPORT IT. THE FOLLOWING DAY THE HAND WAS SORE AND SWOLLEN. HE CALLED IN ON THE MORNING OF 06/07/04 AND WAS TOLD TO GO TO CLINIC.

Struck against a moving object

EE WAS OPERATING SKID STEER, CLEANING SPILLAGE FROM IN FRONT OF THE DUMP HOPPER. A EUCLID R-40 ARRIVED AT THE DUMP HOPPER TO DUMP. THE EUCLID R-40 DRIVER PULLED FORWARD AND STARTED TO BACK UP TO THE HOPPER. HE DID NOT SEE THE SKID STEER AND BACKED INTO IT, THROWING EE FORWARD AGAINST THE SAFETY BAR. DAMAGE TO SKID STEER WAS MINIMAL.

Accident type, without injuries

Strot crete at intersection conveyors s-2 and s-3 a centurm about 15'x15' fell an road service 3 men in mine at time of fall. used man pod to leave mine only men working on repair a laid in slope.

No Value Found

EMPLOYEE FAILED TO FOLLOW DUMP PROCEDURES PRIOR TO RE-ENTRY OF MINE CAUSING RAISED BE TO STRIKE MINE PORTAL.

2003 · 2 incidents

Struck against a moving object

EMPLOYEE WAS MUCKING OUT A ROOM. WHILE TRAVELING FORWARD THE EQUIPMENT STRUCK A LOW SPOT IN THE ROOF WITH THE CAB OF THE LOADER. THIS ACTION STOPPED THE LOADER CAUSING HIS HEAD AND NECK TO MOV E FORWARD. EMPLOYEE EXPERIENCED SORENESS IN THE NECK.

Accident type, without injuries

A ROOF FALL OCCURRED AT INTERSECTION 1 NORTH / 1 WEST. A SECOND FALL OCCURRED 4/27/03 AT INTERSECTION 0 2 NORTH. THE EXACT CAUSE OF ROOF FALL IS UNKNOWN. TECHNICAL EXPERTISE FROM PRIVATE AS WE LL AS MSHA WILL YIELD MORE INFORMATION. BOTH FALLS OCCURRED ABOVE THE ANCHOR ZONE.