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Tidewater Oakland Marine Aggregate Metal/Non-Metal

Martin Marietta Northern California Aggregates,LLC · Surface

Controlled by Martin Marietta Materials Inc

Oakland, Alameda County, CA · Active

MSHA Mine ID: 0403002

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Fatalities: 0
Total incidents: 4
Years on record: 2001–2014
Latest incident: Aug 2014

Compliance record

MSHA citations since 2000

citations

significant & substantial

$7,455

proposed penalties

$7,455

paid to date

Source: MSHA violations data, updated weekly.

Quarterly safety rates

Citations per million employee-hours, as reported to MSHA

Quarter	Hours worked	Citations	Per 1M hrs
2025 Q4	1,864	0	0.0
2025 Q3	443	0	0.0
2025 Q2	2,100	0	0.0
2025 Q1	1,986	1	503.5
2024 Q3	957	0	0.0
2024 Q2	1,515	0	0.0
2024 Q1	1,419	1	704.7
2023 Q4	885	0	0.0

Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.

No fatalities recorded at this mine.

Reportable incidents

4 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.