Mining Incidents

Pier 92 Marine Aggregate Metal/Non-Metal

SAN FRANCISCO, San Francisco County, CA  ·  Active
MSHA Mine ID: 0405261

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Fatalities
0
Total incidents
4
Years on record
2000–2015
Latest incident
Feb 2015
Compliance record
MSHA citations since 2000
46
citations
5
significant & substantial
$4,705
proposed penalties
$4,701
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 S&S Per 1M hrs
2025 Q4 2,828 0 0 0.0
2025 Q3 1,436 1 0 696.4
2025 Q2 3,173 0 0 0.0
2024 Q4 3,226 0 0 0.0
2024 Q3 1,753 0 0 0.0
2024 Q2 985 0 0 0.0
2023 Q4 3,161 0 0 0.0
2023 Q3 971 0 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

2015 · 1 incident

February 17, 2015 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Martin Marietta Northern California Aggregates LLC · Over-exertion in lifting objects

The employee was changing out a screen from a manbasket, when they tried to remove the screen over a bar, which caused a strain to the left shoulder.

2010 · 1 incident

July 14, 2010 CA · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator SLIP OR FALL OF PERSON
Martin Marietta Northern California Aggregates LLC · Over-exertion (Not Elsewhere Classified)

The employee was dismounting a CAT 980F front end loader on level ground with engine off and parking break set. It was daylight the weather clear dry. While turning to face the ladder to dismount the employee twisted his right knee. The injury was diagnosed as a mild sprain. The injury became a time lost accident on 10/8/10 when surgery was required for a torn meniscus.

2004 · 1 incident

August 18, 2004 CA · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator HANDLING OF MATERIALS
Hanson Aggregates West Inc · Over-exertion (Not Elsewhere Classified)

Ee was cleaning up around conveyor belt using a shovel & 1 1/2" water hose. When he returned to his ladder he felt a pain in his left shoulder (strain/sprain). This was initially under investigation by ins. co. for possible connection to prior injury - insurance company accepted claim as a new claim 10-14-04.

2000 · 1 incident

December 14, 2000 CA · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator DISORDERS (REPEATED TRAUMA)
Hanson Aggregates West Inc · Over-exertion (Not Elsewhere Classified)

THE DATE OF THE ACCIDENT WAS 12/14/00 THE EE RECD ONLY 1ST AID TREATMENT & FOLLOW UP VISITS FOR OBSERVATION ONLY. A DIAGNOSIS WAS MADE ON 5/3/01THE THE INJURY NEEDED SURGERY