Mojave Plant & Quarry — Accidents

Total: 250 accidents | Fatalities: 1

Date Classification Injury Days Lost Narrative
01/22/2026 HANDLING OF MATERIALS DAYS AWAY FROM WORK ONLY 1d lost While removing a blockage from silo 42 material flowed from a 3"" access port causing cement to get into the miner's ear.
11/25/2025 OTHER INJURIES DUE TO NATURAL CAUSES None A contract truck driver was delivering Ione clay to the plant. After dumping almost all of the material from the end dump trailer. The driver climbed inside the trailer to remove some material that wa...
08/27/2025 IGNITION OR EXPLOSION OF GAS OR DUST ACCIDENT ONLY None Non injury unplanned ignition occurred at the H7-6-CM1 Day Silo.
04/19/2025 IGNITION OR EXPLOSION OF GAS OR DUST ACCIDENT ONLY None PCS received a displaced rupture disk alarm in Forney indicating an explosion in the Coal Mill 1 system. The investigative process is continuing at this time to identify the root cause. All CM1 Recove...
12/05/2023 OTHER DAYS RESTRICTED ACTIVITY ONLY 4d restricted EE twisted their knee while walking down the stairs in the D3 Mill building. EE states they planted their right foot to turn and felt a pop and pain in right knee. EE thought the pain would dissipate...
09/25/2023 HANDLING OF MATERIALS DAYS AWAY FROM WORK ONLY 3d lost EE states that during normal tower cleaning operations EE heard a pop in right shoulder and began to experience pain.
08/11/2023 HANDLING OF MATERIALS NO DYS AWY FRM WRK,NO RSTR ACT None EE states that while changing a hose on a piece of equipment, EE began to experience pain and discomfort in the neck and back.
08/01/2023 HANDTOOLS (NONPOWERED) DAYS RESTRICTED ACTIVITY ONLY 3d restricted While cutting porta-vac hose with EE's pocket-knife, EE cut through the hose and cut left palm.
06/20/2023 SLIP OR FALL OF PERSON DAYS AWAY FROM WORK ONLY 255d lost EMPLOYEE WAS CLIMBING UP THE STAIRS, WHEN LEFT FOOT WAS CAUGHT UNDER THE STAIR STEP. EMPLOYEE SLIPPED DOWN TO THE NEXT STAIR STEP AND LANDED ON LEFT ANKLE. EMPLOYEE BROKE LEFT ANKLE ON IMPACT AND MA...
06/06/2023 HANDLING OF MATERIALS DAYS AWAY FROM WORK ONLY 7d lost EE received a laceration and tearing injury to the right index fingertip during a hoisting operation.
06/03/2023 MACHINERY NO DYS AWY FRM WRK,NO RSTR ACT None Employee states that while grinding steel plate EE received metal shards in EE's right knee.
04/12/2023 IGNITION OR EXPLOSION OF GAS OR DUST ACCIDENT ONLY None PCS team recognized a temperature rise in the CM1 system. Rupture disks were then displaced.
03/29/2023 POWERED HAULAGE DYS AWY FRM WRK & RESTRCTD ACT 176d lost, 7d restricted EE informed supervisor that they were experiencing pain and discomfort in upper back and arms. EE states that they attributes the pain to repetitive impact from operating all heavy equipment.
03/07/2023 INUNDATION ACCIDENT ONLY None Carbon monoxide and dust infiltrated the D-27 mill while miners were inside the mill performing regular preventative maintenance. A 4gas meter near the opening of the mill detected the CO and alarmed....
02/27/2023 POWERED HAULAGE DAYS AWAY FROM WORK ONLY 334d lost Lack of communication between assigned plant employee and UWCI employee about equipment lockout and rushing to complete the task of aligning conveyor belt with chain come along. UWCI employee right ha...
02/03/2023 HANDLING OF MATERIALS DAYS AWAY FROM WORK ONLY 349d lost EE states that EE has had pain in EE's back and arms since august. EE has refused medical care on multiple occasions. EE contacted EE's supervisor on 2/3/2023, and requested to be seen for the pain. E...
01/17/2023 POWERED HAULAGE FATALITY Fatal EE was involved in a traffic accident on the road that leads to the plant. EE was extricated from the vehicle and transported to the hospital where EE later died.
11/16/2022 HANDLING OF MATERIALS DAYS RESTRICTED ACTIVITY ONLY 8d restricted A chunk of clinker became stuck in the bottom chute of a rail car. EE reached into the opening to free the clinker. When the clinker chunk came free and fell, it lacerated the middle finger on EE's le...
08/17/2022 FIRE ACCIDENT ONLY None Due to arc flash incident (loss of power) in T2-3-1, Central Control was unable to complete the H46-B1 emptying procedures. This allowed pulverized coal to sit in the bottom of the coal surge bin. The...
08/15/2022 ELECTRICAL DAYS AWAY FROM WORK ONLY 290d lost EE was racking in a 4160v disconnect to power a system fan. As EE closed the circuit, the Limit amp shorted causing an arc flash. EE sustained burns to hands and face.
05/26/2022 HANDTOOLS (NONPOWERED) DAYS RESTRICTED ACTIVITY ONLY 14d restricted EE was hoisting roll 3 at the D4 Mill for a hydro spring change out. Chain come along broke causing EE to lose balance and bump left elbow on the D4 structure. EE initially reported to supervisor for...
05/19/2022 HANDLING OF MATERIALS DYS AWY FRM WRK & RESTRCTD ACT 34d lost, 35d restricted EE was loading front loader cutting edges into loader bucket. EE turned to place edge in bucket and felt pain in back and leg.
05/02/2022 HANDLING OF MATERIALS NO DYS AWY FRM WRK,NO RSTR ACT None Picked up an LN25 wire feed welder and heard a pop in EE's abdomen. Employee is off work until further notice. Referred to higher level care for further evaluation. Follow up in clinic 5/3/22
05/02/2022 HANDTOOLS (NONPOWERED) NO DYS AWY FRM WRK,NO RSTR ACT None EE stated that EE was feeling some pain and discomfort in left shoulder from cleaning material from the finish silo chutes.
04/29/2022 SLIP OR FALL OF PERSON DAYS RESTRICTED ACTIVITY ONLY 10d restricted While repositioning hole cover EE stepped into the cross over duct hole and twisted leg. EE is off work until re-evaluation on 5/4/22
04/23/2022 STEPPING OR KNEELING ON OBJECT DAYS RESTRICTED ACTIVITY ONLY 7d restricted Stepped on angle flange 2-3 feet up and hand/footing slipped. Fell backwards, leg locked up on landing injuring right knee
04/01/2022 SLIP OR FALL OF PERSON DAYS RESTRICTED ACTIVITY ONLY 33d restricted EE tripped and fell while walking through the submarine in the reclaimer (dome).
03/08/2022 SLIP OR FALL OF PERSON DAYS RESTRICTED ACTIVITY ONLY 10d restricted EE was walking into the hydraulic carrying a 1"" screw pipe. As the walking into the hydraulic room EE's foot slipped on an oily area of the concrete floor. The EE twisted EE's knee in the process of...
02/18/2022 HANDTOOLS (NONPOWERED) DYS AWY FRM WRK & RESTRCTD ACT 1d lost, 10d restricted A member of the maintenance team was installing a metal pin in the pan feeder chain. After striking the pin with a sledgehammer a small sliver of the metal pin broke off. The metal entered the miners...
12/09/2021 HANDLING OF MATERIALS DAYS RESTRICTED ACTIVITY ONLY 6d restricted Employee was handling stair treads, the treads slipped from their gloved hand, pinching the right ring finger between stair tread and wood 4x4
11/22/2021 HANDTOOLS (NONPOWERED) NO DYS AWY FRM WRK,NO RSTR ACT None Employee was attempting to pry down on a chunk of built up material from the inside wall of a vessel on the preheat tower through an open port via a tower pry bar. When the slab freed up and fell down...
11/10/2021 OTHER NO DYS AWY FRM WRK,NO RSTR ACT None While EE was exiting an enclosed cab sweeper, the wind caught the door and smashed EE's right hand index finger in between the door jam and the door of the sweeper.
11/02/2021 POWERED HAULAGE DAYS AWAY FROM WORK ONLY 158d lost Our tank truck loaded bulk cement. Upon departing plant EE's truck & trailer were impacted by 2 loaded railcars at crossing. No lights or crossing arms were working. Truck and trailer were over-turned...
10/26/2021 POWERED HAULAGE DAYS AWAY FROM WORK ONLY 2d lost The operator was dumping bauxite material at the C4 area. After unloading the material at the C4 area, the employee admitted that employee forgot to lower the bed of the haul truck and struck a conve...
08/27/2021 POWERED HAULAGE DAYS AWAY FROM WORK ONLY 131d lost The employee was repairing a broken screw flight shaft. LOTOTO was not implemented for this task by the employee.
08/07/2021 POWERED HAULAGE DAYS RESTRICTED ACTIVITY ONLY 3d restricted Employees were lowering a bolt template to the ground with a reach forklift and a hoisting bar. The hoisting bar slid off the forks because the locking pins were not in position. The template or the h...
04/21/2021 POWERED HAULAGE DAYS RESTRICTED ACTIVITY ONLY 23d restricted EE reported that around 9:45am they were driving a Caterpillar 777G and hit a bump and felt pain in their right shoulder. EE was diagnosed with a sprained right shoulder on 4-21-21.
02/17/2021 FALLING/SLIDING/ROLLING MATERIALS DAYS AWAY FROM WORK ONLY 5d lost On 2-17-21 EE walked up to C3-DC2 to check on dust collector work progress. EE walked near a platform where bags were being lowered and a bag hit their hard hat. On 2-22-21 EE requested to be evaluate...
10/28/2020 ENTRAPMENT ACCIDENT ONLY None EE was traveling in packhouse elevator when it stopped at 3:24am, EE notified Central Control at that time. EE exited the packhouse elevator at 5:25am. The cause of this incident was a door lock that...
08/08/2020 HANDLING OF MATERIALS NO DYS AWY FRM WRK,NO RSTR ACT None EE was checking flow into KS1 when they got dust in their left eye. EE requested on 8/10/2020 to have their left eye evaluated. EE was diagnosed with a corneal abrasion of the left eye and given a pre...
06/16/2020 POWERED HAULAGE DAYS AWAY FROM WORK ONLY 825d lost EE was a passenger in an F-250 when the driver hit a rock, causing EE to bounce and hit the top of hardhat against the cab of the F-250. EE was diagnosed with a sprain of the back.
04/28/2020 POWERED HAULAGE DAYS RESTRICTED ACTIVITY ONLY 16d restricted EE reported on 5/19/20 that they have been having back pains since operating loader #70 (Caterpillar 992G loader) on 4/28/20. EE was diagnosed on 5/19/20 to have a lower back disorder.
03/20/2020 POWERED HAULAGE DYS AWY FRM WRK & RESTRCTD ACT 276d lost, 15d restricted EE reported chest pains on 3/20/20 and was evaluated with no restrictions. EE was reevaluated on 4/29/2020 and diagnosed with a back sprain.
10/31/2019 MACHINERY DAYS RESTRICTED ACTIVITY ONLY 30d restricted EE was troubleshooting a limit switch when the pneumatic ram actuated pinching EE's left hand. EE was evaluated on 10-31-19 and placed on modified duty.
10/05/2019 HANDLING OF MATERIALS DAYS RESTRICTED ACTIVITY ONLY 1d restricted EE reported on 10/6/2019 they had a sore back assumed to be from loading mill balls into ball mills on 10/5/2019. EE was evaluated on 10/6/2019 and put on modified duty for one day.
09/08/2019 SLIP OR FALL OF PERSON DAYS RESTRICTED ACTIVITY ONLY 1d restricted EE was unlocking kiln pony motor and turned around and tripped. EE hit their left knee on the concrete. EE was evaluated and put on modified duty.
07/05/2019 ENTRAPMENT ACCIDENT ONLY None EE was using an elevator at 8:10pm when an earthquake occurred in Ridgecrest. Elevator had a tripped relay that was replaced resulting in employee exiting elevator at 9:00pm. Thyssen Krupp was called...
06/24/2019 HANDLING OF MATERIALS DYS AWY FRM WRK & RESTRCTD ACT 2d lost, 11d restricted EE was lowering a screw when it became stuck on a guardrail. EE tried moving it with foot and left hand when it moved causing the screw to shift and strike EE's left middle finger between screw and gu...
06/06/2019 ELECTRICAL DAYS RESTRICTED ACTIVITY ONLY 6d restricted EE opened an electrical cabinet on an overhead crane to inspect the wiring when it arc flashed. This resulted in a burn to EE's right index and middle finger.
02/25/2019 HANDTOOLS (NONPOWERED) NO DYS AWY FRM WRK,NO RSTR ACT None On 2/25/19 EE reported a sore right arm from cleaning the tower on floor 1C. EE was evaluated on 3/1/19 and given a prescription.