Mining Incidents

Arcosa ADAMS CLAIM #1850 Metal/Non-Metal

Controlled by Arcosa, Inc
Moundhouse, Lyon County, NV  ·  Active
MSHA Mine ID: 2600668

Arcosa ADAMS CLAIM #1850 has $708K in proposed MSHA penalties and $0 outstanding across 48 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
32
Years on record
1986–2019
Latest incident
Nov 2019
Compliance record
MSHA citations since 2000
520
citations
151
significant & substantial
$708,301
proposed penalties
$477,644
paid to date
67% of proposed penalties paid to date, a $230,657 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
125
inspections on record
3,028
inspection hours
17.2
citations per 100 inspection hours
This rate is recorded citations divided by MSHA inspection hours, per 100 hours. It reflects inspection effort, not mine size or production.
520 citations across 3,028 inspection hours.
Source: MSHA inspections data, updated weekly.

Arcosa ADAMS CLAIM #1850 has $708K in proposed MSHA penalties and $0 outstanding across 48 contested dockets.

Penalty disposition
Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.
$708K
proposed penalties
$478K
current assessed
$478K
paid to date
$0
outstanding
509 assessments are final orders; 48 contested dockets.
As of the most recent assessment on 2026-03-11.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Quarterly safety rates
Citations per million reported employee-hours. Rates begin in 2000, when MSHA's quarterly employment data starts; earlier incidents are counted but cannot be rate-adjusted. Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
Citations per million employee-hours, as reported to MSHA
Quarter Hours worked Citations S&S Per 1M hrs
2025 Q4 13,294 0 0 0.0
2025 Q3 13,673 0 0 0.0
2025 Q2 13,048 0 0 0.0
2025 Q1 13,910 1 1 71.9
2024 Q4 17,132 0 0 0.0
2024 Q3 15,866 0 0 0.0
2024 Q2 16,793 0 0 0.0
2024 Q1 16,320 7 2 428.9
Show 96 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q4 14,835 0 0 0.0
2023 Q3 16,633 0 0 0.0
2023 Q2 17,991 1 0 55.6
2023 Q1 18,447 0 0 0.0
2022 Q4 15,993 0 0 0.0
2022 Q3 17,209 2 1 116.2
2022 Q2 16,288 0 0 0.0
2022 Q1 15,321 2 0 130.5
2021 Q4 14,623 0 0 0.0
2021 Q3 8,966 2 0 223.1
2021 Q2 15,722 0 0 0.0
2021 Q1 16,224 0 0 0.0
2020 Q4 17,149 0 0 0.0
2020 Q3 17,933 1 0 55.8
2020 Q2 17,774 0 0 0.0
2020 Q1 20,195 5 1 247.6
2019 Q4 21,665 2 2 92.3
2019 Q3 20,971 0 0 0.0
2019 Q2 61,187 7 2 114.4
2019 Q1 18,266 13 3 711.7
2018 Q4 20,537 0 0 0.0
2018 Q3 19,692 10 4 507.8
2018 Q2 30,273 0 0 0.0
2018 Q1 24,436 5 3 204.6
2017 Q4 23,362 0 0 0.0
2017 Q3 37,151 4 0 107.7
2017 Q2 28,101 6 1 213.5
2017 Q1 20,136 4 0 198.6
2016 Q4 12,237 0 0 0.0
2016 Q3 22,615 0 0 0.0
2016 Q2 32,463 15 2 462.1
2016 Q1 26,038 0 0 0.0
2015 Q4 26,955 7 2 259.7
2015 Q3 39,924 19 4 475.9
2015 Q2 37,549 4 3 106.5
2015 Q1 32,894 0 0 0.0
2014 Q4 39,186 5 1 127.6
2014 Q3 36,070 0 0 0.0
2014 Q2 32,007 12 2 374.9
2014 Q1 31,074 0 0 0.0
2013 Q4 37,165 13 6 349.8
2013 Q3 27,400 12 2 438.0
2013 Q2 25,049 5 2 199.6
2013 Q1 0 7 2
2012 Q4 30,131 0 0 0.0
2012 Q3 28,762 11 3 382.4
2012 Q2 29,240 19 5 649.8
2012 Q1 25,442 0 0 0.0
2011 Q4 27,136 30 9 1105.5
2011 Q3 25,924 51 16 1967.3
2011 Q2 25,243 9 3 356.5
2011 Q1 20,993 58 13 2762.8
2010 Q4 20,584 2 0 97.2
2010 Q3 20,536 0 0 0.0
2010 Q2 19,361 13 9 671.5
2010 Q1 19,229 10 4 520.0
2009 Q4 18,008 0 0 0.0
2009 Q3 18,166 18 7 990.9
2009 Q2 18,950 1 0 52.8
2009 Q1 14,837 0 0 0.0
2008 Q4 23,415 16 4 683.3
2008 Q3 15,538 0 0 0.0
2008 Q2 22,492 7 1 311.2
2008 Q1 21,889 7 1 319.8
2007 Q4 23,367 0 0 0.0
2007 Q3 23,093 0 0 0.0
2007 Q2 21,835 8 1 366.4
2007 Q1 16,300 0 0 0.0
2006 Q4 19,173 13 7 678.0
2006 Q3 23,681 4 0 168.9
2006 Q2 23,365 0 0 0.0
2006 Q1 16,829 20 4 1188.4
2005 Q4 22,050 0 0 0.0
2005 Q3 21,213 0 0 0.0
2005 Q2 16,977 0 0 0.0
2005 Q1 11,326 21 13 1854.1
2004 Q4 12,528 0 0 0.0
2004 Q3 15,439 0 0 0.0
2004 Q2 18,339 0 0 0.0
2004 Q1 28,912 0 0 0.0
2003 Q4 26,095 2 0 76.6
2003 Q3 19,881 4 2 201.2
2003 Q2 16,678 6 1 359.8
2003 Q1 12,384 0 0 0.0
2002 Q4 12,628 0 0 0.0
2002 Q3 8,668 0 0 0.0
2002 Q2 8,989 6 0 667.5
2002 Q1 7,005 0 0 0.0
2001 Q4 6,786 0 0 0.0
2001 Q3 5,694 3 0 526.9
2001 Q2 8,743 3 1 343.1
2001 Q1 9,777 0 0 0.0
2000 Q4 9,016 0 0 0.0
2000 Q3 10,000 3 0 300.0
2000 Q2 10,086 0 0 0.0
2000 Q1 8,276 2 1 241.7
No fatalities recorded at this mine.

Reportable incidents

32 on file

2019 · 5 incidents

November 7, 2019 NV · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Arcosa Specialty Mtls · Over-exertion in lifting objects

Employee was lifting rocks out of a crusher and felt a pain in back. Employee was taken for a medical evaluation and x-rays and was diagnosed to have muscle strain and returned to work. On 02/07/2020 the employee reported continued pain was sent back for medical evaluation and 02/10/2020 was given an epidural and instructed to be off till 02/14/2020.

October 15, 2019 NV · Metal/Non-Metal crusher attendant/operator, pan feeder operator/worker HANDLING OF MATERIALS
Arcosa Specialty Mtls · Caught in, under or between a moving and a stationary object

Employee was clearing a blockage in the oversize return chute from the inspection door when a large rock unexpectedly shifted smashing the right index finger between the rock and the inspection door frame .

October 7, 2019 NV · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Arcosa Specialty Mtls · Contact with hot objects or substances

Employee was removing old plate metal from a JCI screen chute for repairs using a cutting torch. Employee was wearing safety glasses and a face shield. While cutting the employee hit a pocket of dirt cause molten metal to splatter and blow out. A piece of splatter went under the employees face shield and safety glasses causing a burn to the employees right eye lid and cornea.

August 7, 2019 NV · Metal/Non-Metal miner, prospector, nec MACHINERY
Arcosa Specialty Mtls · Caught in, under or between running or meshing objects

EE was removing the screw cover for the bag house screw. After removing the bolts the EE discovered there was a tack tac weld. The EE took a 6" angle grinder to remove the weld as the wheel contacted the weld it kicked back striking the EE in the Right thigh causing a laceration.

June 13, 2019 NV · Metal/Non-Metal miner, prospector, nec STRIKING OR BUMPING
Arcosa Specialty Mtls · Struck against stationary object

while climbing off the return belt the employee cut EE's left middle finger on the tail of a hose clamp on the spray bar

2016 · 1 incident

November 4, 2016 NV · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
ACG Materials · Struck by falling object

Employee attempted to remove rocks from a jammed conveyor belt, ee states the rocks fell onto finger causing the crush injury with chip fracture.

2015 · 7 incidents

December 21, 2015 NV · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
ACG Materials · Over-exertion in lifting objects

During normal duties the miner was taking out the trash. He picked up a container of cigarette butts and waste material, when he felt a strain in his lower back.

August 31, 2015 NV · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver SLIP OR FALL OF PERSON
ACG Materials · Fall from machine

Miner was exiting haul truck, Terex TA400, when she let go before she got to the bottom of the ladder.

August 18, 2015 NV · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver POWERED HAULAGE
ACG Materials · Struck against a moving object

Truck driver hit by drunk driver. Trucker swerved to avoid fatal accident, bruised right thumb/palm on shift tower. Accident happened on Highway 50 East in Silver Springs, NV.

August 14, 2015 NV · Metal/Non-Metal electrician, lineman DISORDERS (REPEATED TRAUMA)
ACG Materials · (Not Elsewhere Classified)

Noise induced hearing loss

August 14, 2015 NV · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer DISORDERS (REPEATED TRAUMA)
ACG Materials · (Not Elsewhere Classified)

Noise induced hearing loss

July 1, 2015 NV · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
ACG Materials · Over-exertion in lifting objects

Miner was changing out the wear plate on an impact curtain. When lifting the new wear plate into place he felt a pain in his left groin. The miner reported the incident to his foreman, it didn't get reported further. On 9/8/15 the miner went to the ER for his injury, and reported his injury to Human Resources. Incident reported to safety on 12/4/15.

June 10, 2015 NV · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
ACG Materials · Struck by... (Not Elsewhere Classified)

Mechanic was using a 75 ton hydraulic press to press a bearing off of a drive shaft. The bearing was stuck, the miner turned around to get a can of P.B. Blast. When he heard a "pop". He turned back around and was struck in the face by a piece of the bearing race.

2011 · 2 incidents

August 17, 2011 NV · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
ACG Materials · Struck by... (Not Elsewhere Classified)

EE was performing serving of equipment. While servicing the 235 excavator the EE attempted to close the oil check door, it kicked back open and jammed the EE's left thumb. Injury was not serious, EE chose to wait for medical treatment. On 8/31/11 EE chose to accept medical treatment which then showed a tear in the tendon.

June 28, 2011 NV · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
ACG Materials · Over-exertion (Not Elsewhere Classified)

Employee was utilizing a 6' ladder leaned against the drivers side frame to access 2 battery solenoid boxes. When dismounting the ladder he stepped off the first rung in a backward pivoting motion. His right foot was at an angle & rolled upward as he stepped to the ground. The accident resulted in an unspecified ankle sprain.

2010 · 3 incidents

November 22, 2010 NV · Metal/Non-Metal assayer, geologist, metallurgist, engineer, engineer management HANDTOOLS (NONPOWERED)
ACG Materials · Fall to the walkway or working surface

Employee was removing melted snow and ice off of the walkway next to the truck scale. He lost his footing and fell impacting the ground on the right side of his body, resulting in a small closed fracture in the pelvic region. (Dr. said not serious.) Employee is moving around on crutches. (Employee was instructed not to shovel due to his age.)

August 31, 2010 NV · Metal/Non-Metal drill operator HANDLING OF MATERIALS
ACG Materials · Struck by rolling or sliding object

EE was working putting in a differential, after lifting the differential and lining it up, the nut wielded to the differential to stabilize the clevis assembly broke free causing the differential to fall hitting the corner of the pallet below it in return causing it to roll striking ee above the Rt knee. X-rays show no broken bones or limbs. Release the next day.

April 19, 2010 NV · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman MACHINERY
ACG Materials · Caught in, under or between running or meshing objects

Lock out tag out procedure was not followed. Miner got his right hand caught in between conveyor belt and slide rollers.

2006 · 1 incident

October 17, 2006 NV · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator MACHINERY
ACG Materials · Caught in, under or between a moving and a stationary object

Jaw crusher operator was attempting to dislodge a stone wedged at the crusher jaw throat. While attempting to manually move the stone, another stone slid down the attached grizzly, crushing the employees right hand between the two stones. Employee sustained injury to three fingers on rt hand, with amputation necessary at hospital on first two joints of rt ring finger.

2003 · 1 incident

March 6, 2003 NV · Metal/Non-Metal welder (shop) DISORDERS (PHYSICAL AGENTS)
ACG Materials · Flash burns (welding)

EE AWOKE @ 2AM 3/6/03 WITH BURNING PAIN IN BOTH EYES & WAS TAKEN TO NORTHERN NEVADA MEDICAL CENTER BY HIS WIFE. INJURY IS FROM FLASH BURN - COMMON TO WELDERS AND HE WAS GIVEN PAIN MEDICATION, EYE DROPS AND MEDICATED OINTMENT.

2000 · 5 incidents

July 20, 2000 NV · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
ACG Materials · Struck by... (Not Elsewhere Classified)

WHILE HOLDING CVHAIN, WITH METAL WEDGE ATTACHED, CHAIN WAS PULLED FROM HANDS BY A LARGE ROCK IN THE JAW CRUSHER.

May 18, 2000 NV · Metal/Non-Metal mine manager, mine foreman, mine owner MACHINERY
ACG Materials · Struck by... (Not Elsewhere Classified)

WHILE BLAST HOLE DRILLING AND MOVING ROCKS, A ROCK ROLLED DOWN AND PINCHED HAND.

April 28, 2000 NV · Metal/Non-Metal truck driver SLIP OR FALL OF PERSON
ACG Materials · Fall to lower level, (Not Elsewhere Classified)

WHILE WALKING ON DRIVE ABOVE GRID, EMLOYEE FELL THROUGH GRID.

April 25, 2000 NV · Metal/Non-Metal truck driver OTHER
ACG Materials · (Not Elsewhere Classified)

UNK CIRCUMSTANCES AT THIS TIME-DRIVER DECEASED ON SCENE-POSSIBLE HEART ATTACK NO OTHER VEHICLESINVOLVED-NO OTHER INJURINES

April 3, 2000 NV · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
ACG Materials · Caught in, under or between a moving and a stationary object

WHILE INSTALLING A HYDRAULIC CYLINDER ON A TRUCK/TRAILER. THE CYLINDER SLIPPED CATCHING THE 3RD FINGER ON LEFT HAND BETWEEN THE TWO METAL SURFACES.

1999 · 2 incidents

August 11, 1999 NV · Metal/Non-Metal ledgeman/hand, quarry man POWERED HAULAGE
ACG Materials · Struck against a moving object

WHILE DRIVING THE HAUL PAK & THE WATER TRUCK, WATERING THE ROAD TO KEEP THE DUST DOWN, EE HAD DROPPED TOO MUCH WATER CAUSING THE TRUCK TO SLIDE INTO HILLSIDE OUT OF CONTROL

August 9, 1999 NV · Metal/Non-Metal ledgeman/hand, quarry man ENTRAPMENT
ACG Materials · Caught in, under or between (Not Elsewhere Classified)

EE OPENED UP THE ANFO TRAILER, AT WHICH TIME 10 EACH OF 50 LB BAGS OF ANFO FELL OUT, FIVE OF WHICH FELL ON AND ENTRAPPED EE.

1998 · 1 incident

October 28, 1998 NV · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDTOOLS (NONPOWERED)
ACG Materials · Struck by... (Not Elsewhere Classified)

WHILE GREASING GREASE FITTING GOT STUCK WHILE PULLING ON IT CAME LOOSE ELBOW WRENCH BACK & PIECE OF METAL WENT INTO ELBOW NO PERMANMENT DAMAGE

1995 · 2 incidents

August 29, 1995 NV · Metal/Non-Metal welder (shop) MACHINERY
ACG Materials · Struck by... (Not Elsewhere Classified)

EE HAS JUST CHANGE THE GRINDING DISC. HE STARTEDTO GRIND ON THE METAL HANGER & THE DISC DISINTEGRATED, CAUSING CUTS & CONTUSIONS TO THE LEFT HAND & GROIN AREA.

August 21, 1995 NV · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
ACG Materials · Caught in, under or between a moving and a stationary object

THE CRUSHER PLUGGED UP BECAUSE OF WATER USED TO KEEP DUST DOWN. IN AN ATTEMPT TO LOOSEN MUD & ROCKS FROM HAMMERS, LEFT FOOT WAS CAUGHT BETWEEN HAMMER AND CRUSHER FRAME.

1986 · 2 incidents

June 25, 1986 NV · Metal/Non-Metal welder (shop) HANDLING OF MATERIALS
ACG Materials · Struck against stationary object

WAS WELDING, CL5IMED UPON PROCLAIN, STRIKING HEAD, RECEIVED 6 STITCHES (NOT WEARING HARD HAT).

June 10, 1986 NV · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
ACG Materials · Struck by falling object

MECHANIC UP UND9R 988 CAT WHEN PIECE OF ENGINE FELL STRIKING HIM ON THE HEAD REQUIRED 5 SUTURES.

For insurers, brokers, and safety consultants

The full compliance file on Arcosa ADAMS CLAIM #1850

A dated report covering the 26-year penalty trail, line-item violation pattern, contest and docket posture, rate-normalized peer benchmark, and full fatality history. Delivered as a PDF with the underlying data as CSV.