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Twin Peaks Aggregate Metal/Non-Metal

CalPortland Company · Surface
Controlled by Taiheiyo Cement Corp
Mesa, Pima County, AZ  ·  Active
MSHA Mine ID: 0202283

Twin Peaks Aggregate has $7K in proposed MSHA penalties and $6 outstanding across 1 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
9
Years on record
1991–2021
Latest incident
Oct 2021
Compliance record
MSHA citations since 2000
52
citations
11
significant & substantial
$7,391
proposed penalties
$6,885
paid to date
93% of proposed penalties paid to date, a $506 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
63
inspections on record
660
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: 660 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Twin Peaks Aggregate has $7K in proposed MSHA penalties and $6 outstanding across 1 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.
$7K
proposed penalties
$7K
current assessed
$7K
paid to date
$6
outstanding
52 assessments are final orders; 1 contested dockets.
As of the most recent assessment on 2025-03-19.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
See also the operator's enforcement record
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 4,282 0 0 0.0
2025 Q3 3,715 0 0 0.0
2025 Q2 4,303 0 0 0.0
2025 Q1 4,627 1 0 216.1
2024 Q4 4,549 6 0 1319.0
2024 Q3 4,766 0 0 0.0
2024 Q2 6,025 0 0 0.0
2024 Q1 5,074 0 0 0.0
Show 96 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q4 5,163 0 0 0.0
2023 Q3 5,265 0 0 0.0
2023 Q2 5,113 0 0 0.0
2023 Q1 3,710 0 0 0.0
2022 Q4 3,511 0 0 0.0
2022 Q3 3,799 0 0 0.0
2022 Q2 5,730 0 0 0.0
2022 Q1 4,684 0 0 0.0
2021 Q4 3,998 0 0 0.0
2021 Q3 4,741 0 0 0.0
2021 Q2 4,699 0 0 0.0
2021 Q1 4,244 0 0 0.0
2020 Q4 3,726 1 0 268.4
2020 Q3 4,199 0 0 0.0
2020 Q2 4,706 1 0 212.5
2020 Q1 4,633 0 0 0.0
2019 Q4 4,467 0 0 0.0
2019 Q3 4,140 0 0 0.0
2019 Q2 3,757 0 0 0.0
2019 Q1 5,964 0 0 0.0
2018 Q4 6,751 3 2 444.4
2018 Q3 3,270 0 0 0.0
2018 Q2 2,357 1 0 424.3
2018 Q1 2,974 0 0 0.0
2017 Q4 3,213 0 0 0.0
2017 Q3 3,517 0 0 0.0
2017 Q2 3,203 5 1 1561.0
2017 Q1 2,571 0 0 0.0
2016 Q4 2,305 2 0 867.7
2016 Q3 2,064 0 0 0.0
2016 Q2 1,672 2 0 1196.2
2016 Q1 2,077 2 1 962.9
2015 Q4 1,847 0 0 0.0
2015 Q3 2,174 0 0 0.0
2015 Q2 2,146 0 0 0.0
2015 Q1 2,381 0 0 0.0
2014 Q4 1,950 0 0 0.0
2014 Q3 2,313 1 1 432.3
2014 Q2 1,974 0 0 0.0
2014 Q1 1,398 1 1 715.3
2013 Q4 1,434 0 0 0.0
2013 Q3 1,393 0 0 0.0
2013 Q2 1,593 0 0 0.0
2013 Q1 1,741 0 0 0.0
2012 Q4 1,336 0 0 0.0
2012 Q3 901 0 0 0.0
2012 Q2 1,779 2 0 1124.2
2012 Q1 1,676 0 0 0.0
2011 Q4 1,474 1 1 678.4
2011 Q3 1,559 0 0 0.0
2011 Q2 1,449 4 2 2760.5
2011 Q1 1,381 1 0 724.1
2010 Q4 743 0 0 0.0
2010 Q3 626 1 0 1597.4
2010 Q2 704 0 0 0.0
2010 Q1 920 1 0 1087.0
2009 Q4 904 0 0 0.0
2009 Q3 920 0 0 0.0
2009 Q2 1,014 0 0 0.0
2009 Q1 893 0 0 0.0
2008 Q4 924 0 0 0.0
2008 Q3 968 0 0 0.0
2008 Q2 904 0 0 0.0
2008 Q1 920 0 0 0.0
2007 Q4 974 0 0 0.0
2007 Q3 1,312 2 1 1524.4
2007 Q2 1,464 0 0 0.0
2007 Q1 1,552 0 0 0.0
2006 Q4 1,379 0 0 0.0
2006 Q3 1,304 0 0 0.0
2006 Q2 1,248 1 0 801.3
2006 Q1 672 0 0 0.0
2005 Q4 971 0 0 0.0
2005 Q3 966 0 0 0.0
2005 Q2 984 0 0 0.0
2005 Q1 968 1 0 1033.1
2004 Q4 905 0 0 0.0
2004 Q3 959 2 0 2085.5
2004 Q2 1,029 0 0 0.0
2004 Q1 990 0 0 0.0
2003 Q4 993 2 0 2014.1
2003 Q3 1,051 0 0 0.0
2003 Q2 1,055 0 0 0.0
2003 Q1 1,060 0 0 0.0
2002 Q4 1,030 3 1 2912.6
2002 Q3 1,031 1 0 969.9
2002 Q2 1,028 0 0 0.0
2002 Q1 1,015 0 0 0.0
2001 Q4 1,117 0 0 0.0
2001 Q3 1,098 0 0 0.0
2001 Q2 1,117 0 0 0.0
2001 Q1 1,040 0 0 0.0
2000 Q4 1,080 0 0 0.0
2000 Q3 1,051 0 0 0.0
2000 Q2 1,057 4 0 3784.3
2000 Q1 1,102 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

9 on file

2021 · 1 incident

October 8, 2021 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
CalPortland Company · Over-exertion in pulling or pushing objects

While moving a portable staircase, the employee felt a pain in EE's groin while pulling on staircase.

2020 · 1 incident

November 21, 2020 AZ · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech STRIKING OR BUMPING
CalPortland Company · Struck against stationary object

The IW was standing up from retrieving a tool when EE turned around and hit EE's face on an I- beam. The IW suffered a broken nose and a chipped tooth.

2018 · 2 incidents

December 13, 2018 AZ · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDTOOLS (NONPOWERED)
CalPortland Company · Fall to the walkway or working surface

EE was tasked with removing a jammed rock from the jaw portion of a jaw crusher. EE was using a digging bar to accomplish this task. While prying on the bar, EE slipped and fell back onto the same level catwalk.

June 5, 2018 AZ · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver POWERED HAULAGE
CalPortland Company · Caught in, under or between a moving and a stationary object

EE had stopped truck, set brakes and exited truck to talk to another ee. EE was standing on other ee steps when other ee truck started to roll backward, which pinned ee between the door of ee truck and other ee mirror. ee received bruising. Trucks were not damaged.

2006 · 1 incident

January 4, 2006 AZ · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
CalPortland Company · Fall from machine

Employee on top step/deck of loader, opening the cab door, feet slipped and fell off of loader. Transported to hospital and diagnosed with compression fracture lower back. Off work status.

1993 · 2 incidents

July 7, 1993 AZ · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator MACHINERY
Calmat Company Of Arizona · Struck by falling object

HAD CUT A MOTOR STAND OFF OF A BELT & WAS STANDING OFF TO THE SIDE WHILE ANOTHER EMPLOYEE LIFTED IT WITH BOOM TRUCK. HOCK ON BOOM TRUCK CAME LOOSE & MOTOR STAND FLIPPED OVER ON TOP ON INJURED. STRUCK HIM ON RIGHT SHOULDER & THEN PUSHED HIM TO THE GROUND.

1992 · 1 incident

June 3, 1992 AZ · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Calmat Company Of Arizona · Struck by... (Not Elsewhere Classified)

EMPLOYEE WAS CUTTING TRAP IRON OUT OF THE CRUSHER WHEN A PIECE UNDER SPRING PRESSURE SHOT OUT, CUTTING BACK OF LEFT HAND.

1991 · 1 incident

March 7, 1991 AZ · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Calmat Company Of Arizona · Caught in, under or between a moving and a stationary object

TRYING TO CLEAR BRIDGE IN JAW CRUSHER WITH PRY BAR, ROCK SHIFTED AND PINCHED RIGHT FINGER AND MIDDLE FINGER BETWEEN ROCK AND HOPPER.

For insurers, brokers, and safety consultants

The full compliance file on Twin Peaks Aggregate

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.

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