Mining Incidents

Yellowstone MineMetal/Nonmetal

Cameron, Madison County, MT · Active
MSHA Mine ID: 2400163
Fatalities
0
Total incidents
31
Years on record
2000–2026
Latest incident
Mar 2026
No fatalities recorded at this mine.

Reportable incidents

31 on file

2026 · 1 incident

Fall to the walkway or working surface

Driller was walking on the pattern and rolled EE's ankle as EE stepped on a frozen chunk of dirt. Operator fell to the ground got up and stated EE had rolled EE's ankle.

2025 · 1 incident

(Not Elsewhere Classified)

While an employee was working on changing a tire on a haul truck the employee suddenly lost control and feeling in their right arm. Also felt fatigued and nauseas.

2024 · 1 incident

Struck against a moving object

Employee was in Haul Truck #28 being loaded by 559 Shovel on the Phase 6 6000 Bench. While being loaded a large boulder rolled off the bucket of 559 shovel, the boulder landed in the bed of the truck. The impact jarred the truck operator.

2023 · 4 incidents

Fall down stairs

The employee was entering the plant heading to the plant break room. When the employee stepped on the top stair to descend to the break room, EE slipped causing EE to fall awkwardly down the stairs. Employee is experiencing shoulder pain post fall.

(Not Elsewhere Classified)

Audiometric testing performed on 8/23/2023 showed that the employee had hearing loss. Audiometric retesting on 9/18 confirmed that the employee had hearing loss.

(Not Elsewhere Classified)

Audiometric testing performed on 8/23/2023 showed that the employee had hearing loss. Audiometric retesting on 9/18 confirmed that the employee had hearing loss.

Fall onto or against objects

The employee was working on a light vehicle and was standing on the front bumper/cattle guard. When they went to dismount the vehicle, they slipped causing them the strike their ribs/upper torso against the cattle guard.

2022 · 1 incident

Over-exertion (Not Elsewhere Classified)

Employee was baring out a feed hopper. After task was completed employee reported soreness in the hand. Two days elapsed and employee reported swelling

2020 · 2 incidents

Struck against a moving object

Employee was operating haul truck near the new pond when a light vehicle pulled out in front of EE causing EE to lock up the brakes resulting in aggravation of the lower back.

Struck against a moving object

The operator was pushing material and constructing a ditch with a dozer in order to convey water away from the dig face. At the end of shift the operator reported to the pit lead that neck was sore when they tried turning head. Employee could not pinpoint a single event or time that caused the soreness.

2019 · 2 incidents

Fall to the walkway or working surface

Lab Technician slipped and fell while walking up to/reaching to open the door of the Ambulance Barn. Diagnosed with a fracture to the left wrist.

Over-exertion (Not Elsewhere Classified)

Employee had descended into a trench (approximately 3 feet deep X 6 feet wide) at the water pond area of the mine and was climbing up the other side when they felt a pop in their right calf muscle. The employee was later diagnosed with a partial tear to the calf muscle.

2018 · 2 incidents

Struck against stationary object

Employee lacerated the base of right middle finger while removing an oil pan adapter plate from a surface mine hydraulic shovel.

Over-exertion (Not Elsewhere Classified)

Employee alleges that employee strained left shoulder on 3/21/18 barring wet material from feed system. Incident was not reported to the company until 04/09/18. Employee provided doctor's note on 4/09/18 stating need for light duty.

2017 · 1 incident

Over-exertion (Not Elsewhere Classified)

Employee reports numbness in both wrists, initial diagnoses by PA is bi-lateral carpal tunnel syndrome. Further testing to be completed to confirm diagnoses and determine course of treatment.

2016 · 1 incident

Struck against stationary object

Employee was assisting maintenance in the rebuild of a piece of processing equipment, EE jammed left middle finger while positioning a component. The injury was diagnosed as a fracture.

2014 · 1 incident

(Not Elsewhere Classified)

Employee diagnosed with Noise Induced Hearing Loss requiring the use of hearing aids

2013 · 1 incident

Over-exertion in lifting objects

Employee reported left upper arm strain lifting chock block off of water truck, declined medical treatment. Asked for a medical consult one month later. Seen by specialist 7-1-13 and prescribed 6 weeks of physical therapy for biceps tenosynovitis. Released to work with no restrictions.

2012 · 1 incident

Over-exertion (Not Elsewhere Classified)

Employee was performing weed spraying on a slight grade, felt minor stinging sensation in left knee. Later in the shift while entering a pick-up truck the employee reports a pop in the back of his left knee. The employee worked until he was seen by a physician on 7/26 and diagnosed with a torn ACL. Employee was issued work restrictions and will likely require surgery.

2009 · 1 incident

Fall to the walkway or working surface

Walking from loader to travel on concrete, which was wet from the snow, making the film of tail slick. He slipped and fell hurting his left wrist. X-ray's were taken the day of the injury showing a fracture. He will be seeing another Dr for a 2nd opinion and treatment.

2008 · 2 incidents

Struck by... (Not Elsewhere Classified)

While cleaning area between wall and ceiling of new office, a small metallic object embedded into the employee's eye. Required removal by an Opthamolgist

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

The employee was closing the tailgate of his pickup truck and caught the little finger of his left hand between the tailgate and truck bed. The employee was transported to the Ennis Clinic for treatment. The employee was diagnosed with a lateral fracture and receive 4 stitches to close the wound. Antibiotics were prescribed and taken for infection control.

2006 · 3 incidents

Bodily reaction, (Not Elsewhere Classified)

Employee bent down and felt pain in left ankle. Resulted in a sprain/strain to ankle which will require Physical Therapy.

(Not Elsewhere Classified)

An age adjusted audiometric loss comparing baseline (1987) and most recent measurements (2005) has been established, resulting in an average loss of 29 dB in left ear at the 2000Hz range. This illness was confirmed on 4/11/2006 by 3rd party administrator.

Absorption of radiations, caustics, toxic and noxious substances

While loading drill blast holes with anful (ammonia nitrate and diesel fuel) a wind gust blew dust into employee's right eye. The employee sustained a chemical burn from ammonia nitrate dust on cornia of eye.

2005 · 2 incidents

Struck against a moving object

Haul Truck driver was proceeding to dump site, just after having a break. Truck immediately turned almost 90% from the straight haul path, He hit the berm squarely with both tires and slid down the hill approx. 35 feet. He stated that he saw the truck was turning and heading for the berm, but he could not move his legs or arms to stop the truck.

Over-exertion (Not Elsewhere Classified)

The employee reported a problem with ""trigger thumb"". Employee is a QA Lab Technician that works with hands for multiple years. Dr. determined employee sustained work related ""trigger thumb"" to left thumb.

2004 · 2 incidents

Over-exertion (Not Elsewhere Classified)

WHILE EXITING THE LOADER CAB, EE SLIPPED AND GRABBED (LEFT HAND) PART OF THE LOADER TO PREVENT HIS FALL. EE CONTINUED TO WORK AND FINISHED HIS SHIFT. HE THEN WENT TO THE LOCAL DOCTOR. WAS SCHEDULED TO SEE A SPECIALIST ON 11/30/04: DIAGNOSED WITH STRAINED MUSCLE IN LEFT SHOULDER. HE IS SCHEDULED FOR 3 WEEKS, 3-TIMES-PER-WEEK, OF PHYSICAL THERAPY.

Fall to the walkway or working surface

EE WAS EXITING EE TRANSPORT VAN AT START OF SHIFT, PUT LEFT FOOT ON GROUND. FOOT SLIPPED ON ICE CAUSING EE S LEFT ANKLE TO TWIST AS EE FALL TO GROUND. LEFT ANKLE FRACTURE.

2003 · 1 incident

(Not Elsewhere Classified)

AN AGE-ADJUSTED AUDIOMETRIC LOSS COMPARING BASELINE (1987) AND MOST RECENT MEASUREMENTS (2003) HAS BEEN ESTABLISHED, RESULTING IN A HEARING LOSS IN THE EMPLOYEE'S LEFT EAR.

2000 · 1 incident

Fall onto or against objects

WHILE PERFORMING ROUTINE MAINTENCE ON A CONVEYORTHEN CRAWLING OUT FROM UNDER CONVEYOR EE STRUCK HIS HEAD ON A METAL SUPPORT BEAM EE SUSTAINED A SMALL SUTRABLE LACERATION TO HEAD