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Tidewater Oakland Marine Aggregate: 58 MSHA citations Metal/Non-Metal

Oakland, Alameda County, CA  ·  Active
MSHA Mine ID: 0403002

Tidewater Oakland Marine Aggregate has $7K in proposed MSHA penalties and $0 outstanding across 1 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
7
Years on record
1993–2014
Latest incident
Aug 2014
Compliance record
MSHA citations since 2000
58
citations
3
significant & substantial
$7,455
proposed penalties
$7,455
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
See Martin Marietta Northern California Aggregates,LLC's full MSHA compliance history →
Inspection activity
MSHA inspections since 2000
67
inspections on record
604
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: 604 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Tidewater Oakland Marine Aggregate has $7K in proposed MSHA penalties and $0 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
$0
outstanding
57 assessments are final orders; 1 contested dockets.
Of $200 in penalties contested before the Commission, $200 was upheld in final decisions.
As of the most recent assessment on 2025-01-28.
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.
5.2%
significant & substantial
5.2%
high negligence or reckless
5.2%
reasonably likely or greater
50.0%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 27.6% low, 67.2% moderate, 5.2% 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.
2 citations taken to the federal commission · 3% of citations on record
  • Settled 2 · 100%
0%
Penalty reduction in decided contests
$200 proposed, $200 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 2010-03-02.
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 2010-784M Settlement Gill 2011 $200 → $200
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: 2025-07-23
0%
of limit-tested samples over the exposure limit
17
samples
9
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg7
  • Aluminum oxide fumes4
  • Arsenic fumes4
  • Beryllium fumes4
Show the individual readings (73)
Date Contaminant Concentration Limit Conc / limit Occupation
2025-07-23 Respirable dust, <.1mg 0 Front-end Loader Operator
2024-03-05 Respirable dust, <.1mg 0 Front-end Loader Operator
2021-03-02 Respirable dust, <.1mg 0 Front-end Loader Operator
2021-03-02 Respirable dust, <.1mg 0 Mechanic
2020-02-20 Respirable dust, <.1mg 0 Scraper Operator
2015-06-23 Respirable dust, <.1mg 0 Front-end Loader Operator
2011-02-10 Quartz, respirable, >1% Qtz 0.59 0.93 0.63 Front-end Loader Operator
2001-04-11 Iron oxide fumes 0.66 20 0.03 Welder, etc.
2001-04-11 Lead fumes 0 150 0.00 Welder, etc.
2001-04-11 Magnesium oxide fumes 0 10 0.00 Welder, etc.
2001-04-11 Manganese fumes 0.06 5 0.01 Welder, etc.
2001-04-11 Molybdenum fumes 0 10 0.00 Welder, etc.
2001-04-11 Nickel fumes 0 1 0.00 Welder, etc.
2001-04-11 Titanium dioxide fumes 0 10 0.00 Welder, etc.
2001-04-11 Vanadium fumes 0 50 0.00 Welder, etc.
2001-04-11 Zinc oxide fumes 0 5 0.00 Welder, etc.
2001-04-11 Aluminum oxide fumes 0 10 0.00 Welder, etc.
2001-04-11 Arsenic fumes 0 500 0.00 Welder, etc.
2001-04-11 Beryllium fumes 0.03 6 0.01 Welder, etc.
2001-04-11 Cadmium oxide fumes 0 100 0.00 Welder, etc.
2001-04-11 Chromium, insoluble 0 1 0.00 Welder, etc.
2001-04-11 Cobalt fumes 0 100 0.00 Welder, etc.
2001-04-11 Copper fumes 0 100 0.00 Welder, etc.
2001-04-11 Iron oxide fumes 0.09 20 0.00 Welder, etc.
2001-04-11 Lead fumes 0 150 0.00 Welder, etc.
2001-04-11 Magnesium oxide fumes 0 10 0.00 Welder, etc.
2001-04-11 Manganese fumes 0 5 0.00 Welder, etc.
2001-04-11 Molybdenum fumes 0 10 0.00 Welder, etc.
2001-04-11 Nickel fumes 0 1 0.00 Welder, etc.
2001-04-11 Titanium dioxide fumes 0 10 0.00 Welder, etc.
2001-04-11 Vanadium fumes 0 50 0.00 Welder, etc.
2001-04-11 Zinc oxide fumes 0 5 0.00 Welder, etc.
2001-04-11 Aluminum oxide fumes 0 10 0.00 Welder, etc.
2001-04-11 Arsenic fumes 0 500 0.00 Welder, etc.
2001-04-11 Beryllium fumes 0 2 0.00 Welder, etc.
2001-04-11 Cadmium oxide fumes 0 100 0.00 Welder, etc.
2001-04-11 Chromium, insoluble 0 1 0.00 Welder, etc.
2001-04-11 Cobalt fumes 0 100 0.00 Welder, etc.
2001-04-11 Copper fumes 0 100 0.00 Welder, etc.
2001-04-11 Iron oxide fumes 0 10 0.00 Welder, etc.
2001-04-11 Lead fumes 0 150 0.00 Welder, etc.
2001-04-11 Magnesium oxide fumes 0 10 0.00 Welder, etc.
2001-04-11 Manganese fumes 0 5 0.00 Welder, etc.
2001-04-11 Molybdenum fumes 0 10 0.00 Welder, etc.
2001-04-11 Nickel fumes 0 1 0.00 Welder, etc.
2001-04-11 Titanium dioxide fumes 0 10 0.00 Welder, etc.
2001-04-11 Vanadium fumes 0 50 0.00 Welder, etc.
2001-04-11 Zinc oxide fumes 0 5 0.00 Welder, etc.
2001-04-11 Aluminum oxide fumes 0 10 0.00 Welder, etc.
2001-04-11 Arsenic fumes 0 500 0.00 Welder, etc.
2001-04-11 Beryllium fumes 0 2 0.00 Welder, etc.
2001-04-11 Cadmium oxide fumes 0 100 0.00 Welder, etc.
2001-04-11 Chromium, insoluble 0 1 0.00 Welder, etc.
2001-04-11 Cobalt fumes 0 100 0.00 Welder, etc.
2001-04-11 Copper fumes 0 100 0.00 Welder, etc.
2001-04-11 Iron oxide fumes 0.01 10 0.00 Welder, etc.
2001-04-11 Lead fumes 0 150 0.00 Welder, etc.
2001-04-11 Magnesium oxide fumes 0 10 0.00 Welder, etc.
2001-04-11 Manganese fumes 0 5 0.00 Welder, etc.
2001-04-11 Molybdenum fumes 0 10 0.00 Welder, etc.
2001-04-11 Nickel fumes 0 1 0.00 Welder, etc.
2001-04-11 Titanium dioxide fumes 0 10 0.00 Welder, etc.
2001-04-11 Vanadium fumes 0 50 0.00 Welder, etc.
2001-04-11 Aluminum oxide fumes 0 10 0.00 Welder, etc.
2001-04-11 Unlisted Particulate, respirable, <1% Qtz 0.14 Building Repair/Maint.
2001-04-11 Respirable dust, <.1mg 0 Front-end Loader Operator
2001-04-11 Zinc oxide fumes 0 5 0.00 Welder, etc.
2001-04-11 Arsenic fumes 0 500 0.00 Welder, etc.
2001-04-11 Beryllium fumes 0 2 0.00 Welder, etc.
2001-04-11 Cadmium oxide fumes 0 100 0.00 Welder, etc.
2001-04-11 Chromium, insoluble 0 1 0.00 Welder, etc.
2001-04-11 Cobalt fumes 0 100 0.00 Welder, etc.
2001-04-11 Copper fumes 0 100 0.00 Welder, etc.
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.

Tidewater Oakland Marine Aggregate recorded 0.00 reportable injury cases per 100 full-time workers in 2000.

Injury rate, 2000
ⓘ 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
No reportable injury cases in any year shown. Employee-hours were reported in each of those years, so these are true zeros rather than missing data. Citations, listed in the compliance record above, are inspector-found violations and are counted separately from worker injuries.
Below average. The US metal and nonmetal mining average was 4.77 and the all-US-mining average was 5.64 cases per 100 workers.
In California, metal and nonmetal mining averaged 5.70 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.
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. Tidewater Sand & Gravel Inc 1950 to 1999
  2. Hanson Aggregates West Inc 1999 to 2005
  3. Martin Marietta Northern California Aggregates,LLC 2005 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 3
2025 4
2024 3
2023 7
2022 7
2021 7
2020 7
2019 7
2018 7
2017 7
2016 7
2015 6
2014 6
2013 6
2012 6
2011 6
2010 7
2009 7
2008 7
2007 6
2006 6
2005 6
2004 6
2003 7
2002 7
2001 7
2000 18
Source: MSHA quarterly employment and production, updated weekly.

Tidewater Oakland Marine Aggregate sits in Alameda County, California, where the Census mining category is 0.0% 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.
Alameda County, California · Population 1,651,949
0.0%
Mining share of county employment
$126,240
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
2026 Q2 939 0 0 0.0
2026 Q1 1,530 0 0 0.0
2025 Q4 1,864 0 0 0.0
2025 Q3 1,803 0 0 0.0
2025 Q2 2,100 0 0 0.0
2025 Q1 1,986 1 0 503.5
2024 Q4 1,994 0 0 0.0
2024 Q3 1,509 0 0 0.0
Show 98 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 1,515 0 0 0.0
2024 Q1 1,419 1 0 704.7
2023 Q4 2,320 0 0 0.0
2023 Q3 2,404 0 0 0.0
2023 Q2 3,332 0 0 0.0
2023 Q1 2,473 0 0 0.0
2022 Q4 2,678 0 0 0.0
2022 Q3 2,612 0 0 0.0
2022 Q2 2,980 1 0 335.6
2022 Q1 3,293 0 0 0.0
2021 Q4 2,962 0 0 0.0
2021 Q3 2,848 0 0 0.0
2021 Q2 3,605 0 0 0.0
2021 Q1 3,540 0 0 0.0
2020 Q4 3,760 0 0 0.0
2020 Q3 3,379 0 0 0.0
2020 Q2 3,421 0 0 0.0
2020 Q1 3,422 2 0 584.5
2019 Q4 3,458 0 0 0.0
2019 Q3 3,377 0 0 0.0
2019 Q2 2,729 1 0 366.4
2019 Q1 3,394 1 0 294.6
2018 Q4 2,802 0 0 0.0
2018 Q3 3,961 1 0 252.5
2018 Q2 3,549 0 0 0.0
2018 Q1 2,637 0 0 0.0
2017 Q4 2,874 1 0 347.9
2017 Q3 3,051 0 0 0.0
2017 Q2 3,058 4 0 1308.0
2017 Q1 3,040 1 0 328.9
2016 Q4 4,571 0 0 0.0
2016 Q3 3,892 0 0 0.0
2016 Q2 3,332 4 0 1200.5
2016 Q1 3,005 2 0 665.6
2015 Q4 3,772 0 0 0.0
2015 Q3 2,206 0 0 0.0
2015 Q2 2,432 1 0 411.2
2015 Q1 1,833 1 0 545.6
2014 Q4 2,293 0 0 0.0
2014 Q3 2,383 0 0 0.0
2014 Q2 2,298 0 0 0.0
2014 Q1 2,168 2 0 922.5
2013 Q4 2,432 0 0 0.0
2013 Q3 2,327 0 0 0.0
2013 Q2 2,337 0 0 0.0
2013 Q1 2,408 0 0 0.0
2012 Q4 2,333 1 0 428.6
2012 Q3 3,025 0 0 0.0
2012 Q2 2,633 0 0 0.0
2012 Q1 2,665 0 0 0.0
2011 Q4 2,450 0 0 0.0
2011 Q3 2,371 1 0 421.8
2011 Q2 2,686 0 0 0.0
2011 Q1 2,788 2 0 717.4
2010 Q4 2,547 0 0 0.0
2010 Q3 2,787 0 0 0.0
2010 Q2 2,729 0 0 0.0
2010 Q1 3,073 7 2 2277.9
2009 Q4 2,732 7 0 2562.2
2009 Q3 2,641 0 0 0.0
2009 Q2 3,153 1 0 317.2
2009 Q1 2,920 0 0 0.0
2008 Q4 3,562 1 0 280.7
2008 Q3 3,455 0 0 0.0
2008 Q2 3,387 0 0 0.0
2008 Q1 2,866 0 0 0.0
2007 Q4 2,818 0 0 0.0
2007 Q3 2,496 0 0 0.0
2007 Q2 2,883 0 0 0.0
2007 Q1 2,726 0 0 0.0
2006 Q4 2,567 0 0 0.0
2006 Q3 3,155 0 0 0.0
2006 Q2 2,723 0 0 0.0
2006 Q1 2,594 0 0 0.0
2005 Q4 2,640 0 0 0.0
2005 Q3 2,870 0 0 0.0
2005 Q2 2,824 0 0 0.0
2005 Q1 2,978 0 0 0.0
2004 Q4 2,646 1 0 377.9
2004 Q3 2,276 4 0 1757.5
2004 Q2 2,757 0 0 0.0
2004 Q1 2,754 0 0 0.0
2003 Q4 2,717 2 0 736.1
2003 Q3 3,077 0 0 0.0
2003 Q2 2,527 0 0 0.0
2003 Q1 3,817 0 0 0.0
2002 Q4 4,490 0 0 0.0
2002 Q3 4,692 0 0 0.0
2002 Q2 3,731 1 0 268.0
2002 Q1 3,062 0 0 0.0
2001 Q4 4,039 1 0 247.6
2001 Q3 1,939 0 0 0.0
2001 Q2 4,998 0 0 0.0
2001 Q1 4,836 0 0 0.0
2000 Q4 9,206 0 0 0.0
2000 Q3 11,899 0 0 0.0
2000 Q2 11,295 0 0 0.0
2000 Q1 8,982 5 1 556.7
No fatalities recorded at this mine.

Reportable incidents

7 on file

2014 · 1 incident

August 21, 2014 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Martin Marietta Northern California Aggregates,LLC · Over-exertion (Not Elsewhere Classified)

An employee was walking up the shop stairsteps when they inadvertently slipped. The employee did not fall to the ground after holding on to the steps. They felt a pain in the left toe, which was diagnosed as a closed fracture.

2005 · 1 incident

May 9, 2005 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Hanson Aggregates West Inc · Struck by... (Not Elsewhere Classified)

WHILE WORKING ON LOADER, REPLACING STEP; REMOVING BOLT & STEP, ASSEMBLY PIVITED; STRIKING L. FINGER. DIAGNOSED 5/10/05, FRACTURE.

2003 · 1 incident

May 22, 2003 CA · Metal/Non-Metal mine manager, mine foreman, mine owner HANDLING OF MATERIALS
Hanson Aggregates West Inc · Caught in, under or between a moving and a stationary object

EE WAS CHANGING OUT AN OLD SCREEN CLOTH AND WAS MOVING THE TENSION BAR FROM THE OLD SCREEN. EE WAS GETTING HELP FROM ANOTHER EE. THE FIRST EE WAS PULLING ON THE TENSION BAR TO THE RIGHT WHILE THE 2ND EE HIT THE BAR WITH A LUMP HAMMER DISLODGING IT FROM THE SCREEN FRAME, PINCHING 1ST EE'S LEFT THUMB BETWEEN THE BAR AND THE FRAME.

2001 · 1 incident

February 23, 2001 CA · Metal/Non-Metal welder (shop) HANDLING OF MATERIALS
Hanson Aggregates West Inc · Over-exertion in lifting objects

EE HAS DEVELOPED A HERNIA. THE INJURY HAS BEEN DIAGNOSED ON THE DATE OF THE ACCIDENT BY THE PHYSICIAN. THE EE COULD NOT VERIFY WHEN AND WHERE THE INJURY OCCURRED.

1997 · 1 incident

1995 · 1 incident

January 26, 1995 CA · Metal/Non-Metal barge/boat/dredge/towbarge/towboat/leach operator, riverman, deck hand SLIP OR FALL OF PERSON
Tidewater Sand & Gravel Inc · Over-exertion (Not Elsewhere Classified)

EMPLOYEE WAS SECURING STERN BARGE LINE. HE PULLED SLACK AND WAS HIT BY A PAIN IN HIS BACK SO SEVERE HE FELL TO THE DECK. HE WAS UNABLE TO WALK AFTER THIS OCCURRED.

1993 · 1 incident