Mining Incidents

51st Ave. Plant 35: 141 MSHA citations Metal/Non-Metal

Mesa, Maricopa County, AZ  ·  Abandoned
MSHA Mine ID: 0202611

51st Ave. Plant 35 has $36K in proposed MSHA penalties and $71 outstanding across 7 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
30
Years on record
1994–2009
Latest incident
Nov 2009
Compliance record
MSHA citations since 2000
141
citations
35
significant & substantial
$35,832
proposed penalties
$33,367
paid to date
93% of proposed penalties paid to date, a $2,465 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
33
inspections on record
774
inspection hours
n/a
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.
Rate withheld: 774 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

51st Ave. Plant 35 has $36K in proposed MSHA penalties and $71 outstanding across 7 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.
$36K
proposed penalties
$33K
current assessed
$33K
paid to date
$71
outstanding
141 assessments are final orders; 7 contested dockets.
Of $7K in penalties contested before the Commission, $5K was upheld in final decisions.
As of the most recent assessment on 2011-01-20.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Violation severity profile
Shares are computed over citations that carry the MSHA gravity and negligence coding; a small share of records are uncoded.
24.8%
significant & substantial
2.1%
high negligence or reckless
27.7%
reasonably likely or greater
60.3%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 7.8% low, 90.1% moderate, 2.1% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, updated weekly.
When citations were contested
Contesting a citation before the Federal Mine Safety and Health Review Commission is a lawful right. These figures state the public outcomes of that process, from MSHA's Contested Violations file.
6 citations taken to the federal commission · 4% of citations on record
  • Settled 5 · 83%
  • Stood as issued 1 · 17%
67%
S&S designation survived the contest
Counts a Significant & Substantial citation as surviving when a settlement or judge's decision kept the designation, or the contest was dismissed or defaulted so the citation stands as issued. Vacated and withdrawn citations, and settlements that removed the designation, count against.
of 3 decided S&S contests · industry: 79%
37%
Penalty reduction in decided contests
$3K proposed, $2K after decisions · industry: 39%
Source: MSHA Contested Violations file (public record), updated weekly. A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record. Latest contest filed 2010-07-29.
Contested penalties
A reduction or dismissal at the Commission is a lawful outcome of contesting a proposed penalty. Figures are the proposed amount and the amount upheld in the docket's decision.
Largest penalties this mine contested before the Federal Mine Safety and Health Review Commission, with the outcome on record.
Docket Decision Judge Year Proposed / upheld
WEST 2009-1346M Settlement Lesnick 2010 $2K → $2K
WEST20020353M Settlement Cetti 2002 $2K → $1K
WEST 2003-442-M Settlement Melick 2004 $2K → $1K
WEST20020286M Settlement Barbour 2002 $1K → $750
WEST 2010-705M Settlement Lesnick 2010 $745 → $167
WEST 2010-1613M Dismissal Lesnick 2011 $150 → $150
Source: FMSHRC civil penalty dockets and decisions (public record), updated weekly.
Health sampling
A sample is a point in time compliance measurement, not an individual exposure history. These figures describe MSHA sampling records and do not establish causation or personal dose.

Metal and nonmetal contaminants (personal samples)
Many samples are screening measurements of substances with no applicable exposure limit; they are counted as samples but excluded from every over-limit figure. Over-limit shares use only limit-tested samples.

Last sampled: 2009-06-11, 17 years ago
24%
of limit-tested samples over the exposure limit
29
samples
21
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz205 over
  • Respirable dust, <.1mg8
  • Nuisance dust, respirable, <1% Qtz1
Show the individual readings (29)
Date Contaminant Concentration Limit Conc / limit Occupation
2006-04-19 Quartz, respirable, >1% Qtz 1.21 0.45 2.69 Cleanup Man
2003-12-17 Quartz, respirable, >1% Qtz 0.59 0.27 2.19 Cleanup Man
2003-04-14 Quartz, respirable, >1% Qtz 1.93 0.3 6.43 Laborer, Bullgang
2003-04-14 Quartz, respirable, >1% Qtz 0.58 0.41 1.41 Mechanic
2001-04-18 Quartz, respirable, >1% Qtz 0.5 0.24 2.08 Cleanup Man
2009-06-11 Respirable dust, <.1mg 0 Front-end Loader Operator
2009-06-11 Quartz, respirable, >1% Qtz 0.16 0.61 0.26 Laborer, Bullgang
2006-08-01 Respirable dust, <.1mg 0 Truck Driver
2006-08-01 Quartz, respirable, >1% Qtz 0.2 1.24 0.16 Washer Operator
2006-08-01 Quartz, respirable, >1% Qtz 0.17 0.63 0.27 Cleanup Man
2006-08-01 Respirable dust, <.1mg 0 Mechanic
2006-04-19 Respirable dust, <.1mg 0 Truck Driver
2006-04-19 Respirable dust, <.1mg 0 Front-end Loader Operator
2006-04-19 Quartz, respirable, >1% Qtz 0.14 0.39 0.36 Crusher Oper/Worker
2004-06-30 Quartz, respirable, >1% Qtz 0.42 0.49 0.86 Laborer, Bullgang
2004-06-30 Quartz, respirable, >1% Qtz 1.02 1.27 0.80 Mechanic
2004-06-30 Quartz, respirable, >1% Qtz 1.04 1.39 0.75 Crusher Oper/Worker
2003-12-17 Quartz, respirable, >1% Qtz 0.15 0.63 0.24 Mechanic
2003-04-14 Quartz, respirable, >1% Qtz 0.35 0.5 0.70 Crusher Oper/Worker
2003-04-14 Quartz, respirable, >1% Qtz 0.52 2.19 0.24 Truck Driver
2003-04-14 Respirable dust, <.1mg 0 Front-end Loader Operator
2001-12-11 Quartz, respirable, >1% Qtz 0.21 0.92 0.23 Crusher Oper/Worker
2001-12-11 Quartz, respirable, >1% Qtz 0.39 1.17 0.33 Front-end Loader Operator
2001-12-11 Quartz, respirable, >1% Qtz 0.52 2.94 0.18 Mechanic
2001-12-11 Respirable dust, <.1mg 0 Front-end Loader Operator
2001-12-11 Quartz, respirable, >1% Qtz 0.15 0.24 0.63 Washer Operator
2001-12-11 Quartz, respirable, >1% Qtz 0.2 0.91 0.22 Crusher Oper/Worker
2001-04-18 Respirable dust, <.1mg 0 Crusher Oper/Worker
2001-04-18 Nuisance dust, respirable, <1% Qtz 0.14 10 0.01 Front-end Loader Operator
Source: MSHA respirable dust, quartz, and noise sampling records, updated weekly. Metal/nonmetal contaminant figures come from MSHA's Personal Health Samples and Area Samples files (public record), updated weekly.

51st Ave. Plant 35 recorded 0.00 reportable injury cases per 100 full-time workers in 2008.

Injury rate, 2008
This rate is reportable injury cases per 100 full-time-equivalent workers per year, computed as 200,000 times cases divided by MSHA operator-reported employee-hours. Cases are injuries MSHA graded degree 01 through 07; accident-only events that hurt no one are excluded, and so are contractor injuries, whose hours do not attach to a single mine. Rates begin in 2000, when quarterly employment reporting starts, and are withheld below 20,000 hours in a year.
0.00
total case rate
0.00
days-away rate
0.000
fatality rate
Below average. The US metal and nonmetal mining average was 3.15 and the all-US-mining average was 3.61 cases per 100 workers.
In Arizona, metal and nonmetal mining averaged 3.99 cases per 100 workers that year.
Under 100,000 employee-hours were reported that year, so a single case moves the rate by two or more. Read the figure as approximate.
Year total case rate days-away fatal
2008 * 0.00 0.00 0.000
2007 * 0.00 0.00 0.000
2006 * 0.00 0.00 0.000
2005 * 4.01 4.01 0.000
2004 * 11.30 3.77 0.000
2003 * 10.58 0.00 0.000
2002 * 7.19 3.59 0.000
2001 * 6.45 0.00 0.000
* Fewer than 100,000 employee-hours that year; the rate is less stable.
Source: injury cases from MSHA accident and injury records; employee-hours from MSHA quarterly employment reports. Rate is cases per 100 full-time-equivalent workers, operator employees only.
Ownership history
  1. Cashway Concrete & Materials Corp 1993 to 1997
  2. Pioneer Concrete Of Arizona Inc 1997 to 2000
  3. Hanson Aggregates Arizona, Inc 2000 to 2010
  4. Hanson Aggregates LLC 2010 to 2022
  5. Martin Marietta Materials, Inc 2022 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2012 4
2011 8
2010 9
2009 9
2008 10
2007 16
2006 18
2005 22
2004 22
2003 25
2002 25
2001 27
2000 13
Source: MSHA quarterly employment and production, updated weekly.

51st Ave. Plant 35 sits in Maricopa County, Arizona, where the Census mining category is 0.2% of county employment.

Local economic context
County figures come from the US Census Bureau's American Community Survey, 5-year pooled estimates, so the 2023 vintage covers 2019 through 2023. The Census category is 'mining, quarrying, and oil and gas extraction', which is broader than MSHA jurisdiction and includes oil and gas workers no mine employs. These figures describe the surrounding county, not this mine, and are not a factor in any specific incident.
Maricopa County, Arizona · Population 4,491,987
0.2%
Mining share of county employment
$85,518
Median household income
Source: US Census Bureau, American Community Survey 2023 5-year estimates.
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
2012 Q1 1,014 0 0 0.0
2011 Q4 3,117 0 0 0.0
2011 Q3 2,880 0 0 0.0
2011 Q2 3,606 0 0 0.0
2011 Q1 4,551 2 0 439.5
2010 Q4 3,381 0 0 0.0
2010 Q3 5,937 0 0 0.0
2010 Q2 4,841 7 3 1446.0
Show 41 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2010 Q1 4,216 0 0 0.0
2009 Q4 3,345 18 4 5381.2
2009 Q3 3,746 0 0 0.0
2009 Q2 4,315 6 1 1390.5
2009 Q1 5,186 0 0 0.0
2008 Q4 5,203 5 0 961.0
2008 Q3 6,146 3 0 488.1
2008 Q2 6,043 1 0 165.5
2008 Q1 6,485 5 1 771.0
2007 Q4 8,356 0 0 0.0
2007 Q3 13,097 8 1 610.8
2007 Q2 9,001 0 0 0.0
2007 Q1 8,170 2 0 244.8
2006 Q4 10,367 0 0 0.0
2006 Q3 10,026 7 1 698.2
2006 Q2 10,743 6 1 558.5
2006 Q1 11,733 0 0 0.0
2005 Q4 11,868 0 0 0.0
2005 Q3 11,637 0 0 0.0
2005 Q2 12,227 0 0 0.0
2005 Q1 14,096 0 0 0.0
2004 Q4 14,452 0 0 0.0
2004 Q3 13,816 0 0 0.0
2004 Q2 12,067 5 1 414.4
2004 Q1 12,745 0 0 0.0
2003 Q4 15,325 6 1 391.5
2003 Q3 14,149 0 0 0.0
2003 Q2 14,310 12 4 838.6
2003 Q1 12,910 1 0 77.5
2002 Q4 15,491 0 0 0.0
2002 Q3 13,765 0 0 0.0
2002 Q2 14,094 0 0 0.0
2002 Q1 12,316 0 0 0.0
2001 Q4 22,499 6 4 266.7
2001 Q3 17,229 0 0 0.0
2001 Q2 10,957 21 4 1916.6
2001 Q1 11,374 0 0 0.0
2000 Q4 7,667 0 0 0.0
2000 Q3 9,863 0 0 0.0
2000 Q2 715 7 5 9790.2
2000 Q1 7,594 6 1 790.1
No fatalities recorded at this mine.

Reportable incidents

30 on file

2009 · 2 incidents

June 3, 2009 AZ · Metal/Non-Metal water truck operator POWERED HAULAGE
Hanson Aggregates Arizona, Inc · Over-exertion (Not Elsewhere Classified)

EE operating water truck drove over pot hole. The steering wheel turned to the right quickly with left hand gripped to steering wheel, causing shoulder strain & cervical strain.

2005 · 1 incident

March 17, 2005 AZ · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Hanson Aggregates Arizona, Inc · Over-exertion in pulling or pushing objects

Injured employee was unplugging chutes in #2 wash plant using a 3/4" by 60" round stock. The chutes were shoulder height or slightly higher and while hitting chute, employee used force to dislodge material and injured right shoulder. (Torn rotator cuff; surgery performed 7/14/05.)

2004 · 4 incidents

July 13, 2004 AZ · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver POWERED HAULAGE
Hanson Aggregates Arizona, Inc · Struck against a moving object

EMPLOYEE WAS DRIVING HAUL TRUCK WHEN HE DRIFTED OFF THE ROADWAY STRIKING A BERMED AREA.

May 15, 2004 AZ · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDTOOLS (NONPOWERED)
Hanson Aggregates Arizona, Inc · Struck by... (Not Elsewhere Classified)

EE WAS CUTTING BELT MATERIAL AND CUT HIS HAND.

March 16, 2004 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman POWERED HAULAGE
Hanson Aggregates Arizona, Inc · Struck against a moving object

WHILE IN THE JAY-JOHN A FELLOW EMPLOYEE DUMPED A BUCKET OF WATER AND SAND ON JOHN. THE EE SUFFERED A CHEST WALL STRAIN. ALL PARTIES INVOLVED WERE THEN DISCIPLINED FOR HORSEPLAY.

February 27, 2004 AZ · Metal/Non-Metal

EE WAS CUTTING A NEW PIECE OF SKIRTBOARD ON THE GROUND WHEN ANOTHER BACKED UP A PICK-UP TRUCK STRIKING THE EMPLOYEE.

2003 · 3 incidents

October 2, 2003 AZ · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDTOOLS (NONPOWERED)
Hanson Aggregates Arizona, Inc · Struck by... (Not Elsewhere Classified)

WHILE USING A UTILITY KNIFE THE KNIFE SLIPPED AND CUT THE EMPLOYEES LEFT ARM.

September 15, 2003 AZ · Metal/Non-Metal driver, jeep driver, tractor operator HANDLING OF MATERIALS
Hanson Aggregates Arizona, Inc · Struck by... (Not Elsewhere Classified)

EMPLOYEE WASHING DOWN EQUIPMENT, LET GO OF WATER HOSE, HOSE WAS UNDER PRESSURE AND WHEN EMPLOYEE LET GO OF THE HOSE IT WHIPPED DOWN AND HIT EMPLOYEE ON TOP OF FOOT.

2002 · 2 incidents

April 4, 2002 AZ · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDTOOLS (NONPOWERED)
Hanson Aggregates Arizona, Inc · Struck by... (Not Elsewhere Classified)

WHILE TRIMMING A PIECE OF CONVEYOR BELTING ON THE FEEDER, EE CUT THROUGH BELTING AND KNIFE WENT INTO HIS FOREARM.

2001 · 2 incidents

November 1, 2001 AZ · Metal/Non-Metal welder (shop) HANDLING OF MATERIALS
Hanson Aggregates Arizona, Inc · Caught in, under or between a moving and a stationary object

WHILE PUTTING A CHAIN AROUND A CONCRETE ROCK, WHEN HE AND A CO-WORKER STARTED TO PULL THE ROCK UP IT SMASHED RIGHT HAND BETWEEN CHAIN AND ROCK.

2000 · 2 incidents

December 6, 2000 AZ · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Hanson Aggregates Arizona, Inc · Struck by falling object

TAKING DOWN WING ON THE FEEDER IT SLID ON TO HIS FOOT (RIGHT FOOT)

June 10, 2000 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Pioneer Concrete Of Arizona Inc · Struck by... (Not Elsewhere Classified)

CREW WAS CHANGING CONE LLINER, PLACIDO PUT FINGER IN HOLE TO REMOVE A SHIM AND THE LINER FELL AND CUT OFF PORTION OF RIGHT INDEX FINGER 1 ST JOINT.

1999 · 1 incident

June 14, 1999 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Pioneer Concrete Of Arizona Inc · Struck by... (Not Elsewhere Classified)

EMPLOYEE WAS REMOVING A PORTABLE STAND WITH A FOUR POUND HAMMER WHEN A PIECE OF METAL FROM A PINCUT HIS CHIN.

1998 · 4 incidents

December 16, 1998 AZ · Metal/Non-Metal crane operator, mobile equipment operator (meo), dragline operator, dropball operator, rigger POWERED HAULAGE
Pioneer Concrete Of Arizona Inc · Struck against a moving object

DRIVING SCRAPER ON ROUGH GROUND STRAINED BACK

November 3, 1998 AZ · Metal/Non-Metal crane operator, mobile equipment operator (meo), dragline operator, dropball operator, rigger HANDLING OF MATERIALS
Pioneer Concrete Of Arizona Inc · Over-exertion in lifting objects

WHILE LIFTING SCRAPER CUTTING EDGE, OVEREXTENDED ELBOW AND CAUSED STRAIN.

April 28, 1998 AZ · Metal/Non-Metal crane operator, mobile equipment operator (meo), dragline operator, dropball operator, rigger HANDTOOLS (NONPOWERED)
Pioneer Concrete Of Arizona Inc · Struck by... (Not Elsewhere Classified)

WHILE REPLACING RIPPER TOOTH ON LOADER BUCKET, EMPLOYEE HAMMERED ON HARDENED TOOTH TO LINK UP HOLES FOR RETAINING PIN. SPLINTER BROK OFF AND PENETRATED LEFT FOREARM. PIECE WAS SURGICALLY REMOV ED.

1997 · 3 incidents

April 16, 1997 AZ · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Cashway Concrete & Materials Corp · Over-exertion in lifting objects

EMPLOYEE WAS REMOVING A FLYWHEEL FROM A TRUCK WHEN HE SPRAINED HIS RIGHT WRIST.

April 5, 1997 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman MACHINERY
Cashway Concrete & Materials Corp · Over-exertion (Not Elsewhere Classified)

EMP WAS STEAM CLEANING TRUCKS. AFTER A FEW HOURSSHE EXPERIENCED A TINGLING SENSATION IN RIGHT ARM. NEXT MORNING SHE AWOKE WITH NUMBNESS IN ARM AND HAND.

January 23, 1997 AZ · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Cashway Concrete & Materials Corp · Fall from machine

WHILE ADDING COOLANT TO RADIATOR, MECHANIC LOST HIS FOOTING AND SLIPPED OFF OF LEFT KNEE, STRAINED ONLY.

1996 · 2 incidents

August 27, 1996 AZ · Metal/Non-Metal greaser, grease man, oiler, lube man, dragline oiler HANDLING OF MATERIALS
Cashway Concrete & Materials Corp · Over-exertion (Not Elsewhere Classified)

EMPLOYEE WAS PLCING A FULL FUEL CAN 5 GAL. INTO BED OF TRUCK WHEN HE FELT A PAIN IN THE PALM OF HIS HAND.

July 17, 1996 AZ · Metal/Non-Metal master mechanic, foreman, supervisor HANDLING OF MATERIALS
Cashway Concrete & Materials Corp · Struck against stationary object

EE, A MECHANIC, BENT DOWN TO PICK UP A CHUTE AND WHEN HE AROSE, STURCK HIS HEAD ON FLOP CHUTE. LACERATION ON SCALP AND MEDICAL TREATMENT REQUIRED (STITCHES).

1995 · 2 incidents

November 3, 1995 AZ · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator POWERED HAULAGE
Cashway Concrete & Materials Corp · Over-exertion (Not Elsewhere Classified)

EE WAS REPAIRING A CONVEYOR BELT WHEN THE LOADER BUCKET IN WHICH HE WAS STANDING ABRUPTLY AND RAPIDLY DESCENDED APPROX 6 INCHES. HE DID NOT FALL OR HIT HIMSELF BUT WAS JARRED.

February 20, 1995 AZ · Metal/Non-Metal welder (shop) SLIP OR FALL OF PERSON
Cashway Concrete & Materials Corp · Over-exertion (Not Elsewhere Classified)

EMPLOYEE WAS WELDING INSIDE A SCRAPER IN AN AWKWARD POSITION WHEN HE LOST HIS BALANCE, SLIPPED, FELL AND SPRAINED HIS LEFT ANKLE. AT TIME OF INCIDENT, EMPLOYEE WAS HAMMERING A STEEL WEDGE WITH A SMALL HAMMER.

1994 · 2 incidents

December 12, 1994 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Cashway Concrete & Materials Corp · Over-exertion (Not Elsewhere Classified)

EMPLOYEE WAS SHOVELING DIRT FROM UNDER THE WASHPLANT WHEN JOB COMPLETED EMPLOYEE FELT A STRAIN OR PULL IN GROIN/TESTICLE

March 22, 1994 AZ · Metal/Non-Metal welder (shop) HANDTOOLS (NONPOWERED)
Cashway Concrete & Materials Corp · Struck by... (Not Elsewhere Classified)

EMPLOYEE WAS USING A HAMMER TO DRIVE BOLTS OUT OF SCREEN BOX. HAMMER BOUNCED OFF BOLT STRIKING FOREHEAD ABOVE LEFT EYE, CAUSING A LACERATION.