Mining Incidents

Santee Aggregates: 150 MSHA citations Metal/Non-Metal

Santee, San Diego County, CA  ·  Active
MSHA Mine ID: 0405564

Santee Aggregates has $36K in proposed MSHA penalties and $0 outstanding across 1 contested dockets, plus health sampling and the full incident record.

Watch this mine

Email me when a new MSHA incident is filed at Santee Aggregates.

Fatalities
0
Total incidents
17
Years on record
2004–2020
Latest incident
Aug 2020
Compliance record
MSHA citations since 2003
150
citations
35
significant & substantial
$36,344
proposed penalties
$36,344
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2003
57
inspections on record
1,242
inspection hours
12.1
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.
150 citations across 1,242 inspection hours.
Source: MSHA inspections data, updated weekly.

Santee Aggregates has $36K 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.
$36K
proposed penalties
$36K
current assessed
$36K
paid to date
$0
outstanding
141 assessments are final orders; 1 contested dockets.
Of $94 in penalties contested before the Commission, $94 was upheld in final decisions.
As of the most recent assessment on 2026-02-12.
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.
23.3%
significant & substantial
10.0%
high negligence or reckless
23.3%
reasonably likely or greater
45.3%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 23.3% low, 66.7% moderate, 10.0% 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.
1 citations taken to the federal commission · 1% of citations on record
  • Settled 1 · 100%
0%
Penalty reduction in decided contests
$94 proposed, $94 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 2006-04-12.
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 2006-327M Settlement Lesnick 2006 $94 → $94
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: 2024-04-17
9%
of limit-tested samples over the exposure limit
22
samples
11
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz121 over
  • Respirable dust, <.1mg8
  • Unlisted Particulate, respirable, <1% Qtz2
Show the individual readings (22)
Date Contaminant Concentration Limit Conc / limit Occupation
2006-01-18 Quartz, respirable, >1% Qtz 3.29 0.79 4.16 Laborer, Bullgang
2024-04-17 Respirable dust, <.1mg 0 Front-end Loader Operator
2023-07-11 Quartz, respirable, >1% Qtz 0.19 Utility Man
2019-07-17 Quartz, respirable, >1% Qtz 0.29 0.9 0.32 Laborer, Bullgang
2019-07-17 Quartz, respirable, >1% Qtz 0.21 0.64 0.33 Laborer, Bullgang
2015-10-08 Respirable dust, <.1mg 0 Bulldozer Operator
2015-10-08 Quartz, respirable, >1% Qtz 0.32 1.72 0.19 Utility Man
2015-10-08 Respirable dust, <.1mg 0 Front-end Loader Operator
2015-10-08 Quartz, respirable, >1% Qtz 0.17 0.95 0.18 Oiler, Greaser
2014-11-04 Quartz, respirable, >1% Qtz 0.53 0.71 0.75 Mechanic
2014-11-04 Respirable dust, <.1mg 0 Truck Driver
2014-11-04 Respirable dust, <.1mg 0 Bulldozer Operator
2009-07-08 Quartz, respirable, >1% Qtz 0.22 0.92 0.24 Bobcat Operator
2006-05-10 Quartz, respirable, >1% Qtz 0.4 0.77 0.52 Cleanup Man
2006-01-18 Unlisted Particulate, respirable, <1% Qtz 0.41 Front-end Loader Operator
2006-01-18 Respirable dust, <.1mg 0 Laborer, Bullgang
2004-11-03 Quartz, respirable, >1% Qtz 0.14 1.15 0.12 Bulldozer Operator
2004-11-03 Unlisted Particulate, respirable, <1% Qtz 0.24 Scraper Operator
2004-11-03 Respirable dust, <.1mg 0 Scraper Operator
2003-12-17 Quartz, respirable, >1% Qtz 0.28 0.53 0.53 Cleanup Man
2003-12-17 Quartz, respirable, >1% Qtz 0.12 0.51 0.24 Front-end Loader Operator
2003-12-17 Respirable dust, <.1mg 0 Screen/Scalper 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.

Santee Aggregates recorded 0.00 reportable injury cases per 100 full-time workers in 2025.

Injury rate, 2025
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 1.65 and the all-US-mining average was 1.97 cases per 100 workers.
In California, metal and nonmetal mining averaged 1.42 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
2025 * 0.00 0.00 0.000
2024 * 0.00 0.00 0.000
2023 * 0.00 0.00 0.000
2022 * 0.00 0.00 0.000
2021 * 0.00 0.00 0.000
2020 * 3.26 3.26 0.000
2019 * 0.00 0.00 0.000
2018 * 0.00 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. Hanson Aggregates Pacific Southwest Inc 2003 to 2021
  2. Martin Marietta San Diego Aggregates, LLC 2021 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 16
2025 23
2024 23
2023 27
2022 31
2021 29
2020 28
2019 26
2018 25
2017 25
2016 20
2015 17
2014 15
2013 10
2012 10
2011 10
2010 13
2009 14
2008 14
2007 11
2006 14
2005 11
2004 8
2003 8
Source: MSHA quarterly employment and production, updated weekly.

Santee Aggregates sits in San Diego 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.
San Diego County, California · Population 3,282,782
0.0%
Mining share of county employment
$102,285
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 8,143 0 0 0.0
2026 Q1 7,080 1 0 141.2
2025 Q4 8,211 0 0 0.0
2025 Q3 11,632 0 0 0.0
2025 Q2 13,886 2 0 144.0
2025 Q1 12,311 2 1 162.5
2024 Q4 13,296 0 0 0.0
2024 Q3 13,541 0 0 0.0
Show 84 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 13,678 2 0 146.2
2024 Q1 12,401 3 1 241.9
2023 Q4 15,294 0 0 0.0
2023 Q3 14,519 2 0 137.8
2023 Q2 12,533 0 0 0.0
2023 Q1 10,354 1 1 96.6
2022 Q4 10,608 0 0 0.0
2022 Q3 17,111 1 0 58.4
2022 Q2 19,140 0 0 0.0
2022 Q1 17,990 0 0 0.0
2021 Q4 13,800 0 0 0.0
2021 Q3 17,923 0 0 0.0
2021 Q2 19,469 5 0 256.8
2021 Q1 17,079 0 0 0.0
2020 Q4 15,751 5 2 317.4
2020 Q3 15,182 0 0 0.0
2020 Q2 13,690 2 0 146.1
2020 Q1 16,796 0 0 0.0
2019 Q4 15,482 7 2 452.1
2019 Q3 14,602 1 0 68.5
2019 Q2 14,556 0 0 0.0
2019 Q1 11,072 0 0 0.0
2018 Q4 13,878 1 0 72.1
2018 Q3 14,070 0 0 0.0
2018 Q2 14,150 4 1 282.7
2018 Q1 13,824 2 1 144.7
2017 Q4 13,120 0 0 0.0
2017 Q3 14,414 1 1 69.4
2017 Q2 14,652 0 0 0.0
2017 Q1 12,426 4 2 321.9
2016 Q4 11,805 0 0 0.0
2016 Q3 11,977 0 0 0.0
2016 Q2 9,632 5 1 519.1
2016 Q1 10,570 0 0 0.0
2015 Q4 10,232 2 0 195.5
2015 Q3 9,947 2 1 201.1
2015 Q2 8,588 0 0 0.0
2015 Q1 11,974 0 0 0.0
2014 Q4 9,259 3 0 324.0
2014 Q3 10,243 0 0 0.0
2014 Q2 9,492 1 0 105.4
2014 Q1 8,823 0 0 0.0
2013 Q4 5,701 3 0 526.2
2013 Q3 6,947 2 0 287.9
2013 Q2 6,018 3 1 498.5
2013 Q1 5,566 0 0 0.0
2012 Q4 5,727 0 0 0.0
2012 Q3 5,406 0 0 0.0
2012 Q2 5,160 2 0 387.6
2012 Q1 4,982 4 0 802.9
2011 Q4 5,048 0 0 0.0
2011 Q3 5,987 0 0 0.0
2011 Q2 6,555 2 0 305.1
2011 Q1 5,954 0 0 0.0
2010 Q4 4,990 2 0 400.8
2010 Q3 7,640 0 0 0.0
2010 Q2 6,262 3 2 479.1
2010 Q1 7,757 3 1 386.7
2009 Q4 7,566 0 0 0.0
2009 Q3 6,968 1 0 143.5
2009 Q2 8,394 0 0 0.0
2009 Q1 5,097 0 0 0.0
2008 Q4 5,354 4 1 747.1
2008 Q3 7,120 1 0 140.4
2008 Q2 8,374 2 0 238.8
2008 Q1 6,763 0 0 0.0
2007 Q4 7,258 2 1 275.6
2007 Q3 8,473 0 0 0.0
2007 Q2 9,799 0 0 0.0
2007 Q1 9,411 0 0 0.0
2006 Q4 12,510 0 0 0.0
2006 Q3 9,440 0 0 0.0
2006 Q2 7,540 2 0 265.3
2006 Q1 7,344 6 2 817.0
2005 Q4 7,996 0 0 0.0
2005 Q3 6,147 0 0 0.0
2005 Q2 6,135 4 1 652.0
2005 Q1 7,009 0 0 0.0
2004 Q4 6,916 3 1 433.8
2004 Q3 7,942 0 0 0.0
2004 Q2 6,764 0 0 0.0
2004 Q1 4,928 0 0 0.0
2003 Q4 5,981 3 0 501.6
2003 Q3 4,860 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

17 on file

2020 · 1 incident

August 14, 2020 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer POWERED HAULAGE
Hanson Aggregates Pacific Southwest Inc · Struck against a moving object

Employee was operating a Haul truck when EE went over a mound of material at approximately 30mph. EE received friction burns and a lower back strain.

2016 · 2 incidents

December 15, 2016 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDTOOLS (NONPOWERED)
Hanson Aggregates Pacific Southwest Inc · Over-exertion in wielding or throwing objects

Employee was using a bar to clear a sand hopper. Five days later, employee said elbow was hurting. Employee reported the injury on 12/20/2016.

June 29, 2016 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech OTHER
Hanson Aggregates Pacific Southwest Inc · Absorption of radiations, caustics, toxic and noxious substances

Injured miner received bee stings when a nearby dozer ran over a box containing a bee hive. The hive swarmed around the injured miner and stung EE on head and neck. EE was treated at the company clinic and released to full duty.

2014 · 1 incident

October 25, 2014 CA · Metal/Non-Metal utility man, shift tech, service/dump truck operator MACHINERY
Hanson Aggregates Pacific Southwest Inc · Caught in, under or between (Not Elsewhere Classified)

Employee was removing bolts from crusher top shell with air gun and caught his right thumb between the air gun handle and top shell of the crusher.

2012 · 1 incident

June 5, 2012 CA · Metal/Non-Metal ledgeman/hand, quarry man HANDTOOLS (NONPOWERED)
Hanson Aggregates Pacific Southwest Inc · Caught in, under or between a moving and a stationary object

Employee was installing rubber screens with a slide hammer in the middle deck of a screen. When he was hitting one screen in the bottom of the hammer slipped off the panel and causing the whole slide hammer to fall suddenly and smash his finger between the handle of the hammer and the bucker bar rail on the top deck.

2009 · 3 incidents

December 28, 2009 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech POWERED HAULAGE
Hanson Aggregates Pacific Southwest Inc · Caught in, under or between (Not Elsewhere Classified)

Employee was digging out the # 1 three inch feeder with a digging bar, a loader was digging out # 2 feeder when material on the northwest edge of feeder #1 sloughed off and caught his legs causing a right knee strain.

June 19, 2009 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Hanson Aggregates Pacific Southwest Inc · Struck against a moving object

Employee was operating back hoe moving raw material in front of pit feeder for block wall placement when he felt tightness in his back from bouncing in the seat of the equipment while operating it.

March 26, 2009 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator MACHINERY
Hanson Aggregates Pacific Southwest Inc · Contact with hot objects or substances

Employee was overhead welding a cross brace in the wet screen when hot slag dripped into the gap of his long sleeve shirt where it buttons at the wrist and it gave him 2 small burns on his left elbow. The small burns developed into an infection which resulted in lost time because employee did not report the incident to his supervisor until 4/14/2009

2008 · 2 incidents

October 14, 2008 CA · Metal/Non-Metal master mechanic, foreman, supervisor OTHER
Hanson Aggregates Pacific Southwest Inc · Struck by... (Not Elsewhere Classified)

While the employee was grinding slag off a piece of angle iron a gust of wind blew a small piece of grinding under the employee's face shield and safety glasses into his upper eye lid.

February 7, 2008 CA · Metal/Non-Metal backhoe operator, trackhoe operator SLIP OR FALL OF PERSON
Hanson Aggregates Pacific Southwest Inc · Fall to lower level, (Not Elsewhere Classified)

Employee was checking baghouse #2. When he stepped off the slab, he sank in the mud which appeared to be hard ground. His right leg sank about 14". Employee started to twist and turn before he realized his footing was unstable.

2007 · 1 incident

July 11, 2007 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Over-exertion in lifting objects

While cleaning up a construction site the employee was lifting a 30 lbs piece of metal when he felt a strain in his low back.

2006 · 2 incidents

July 13, 2006 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Struck by falling object

While holding the ladder for a co-worker, a large slab of metal the co-worker was working with slipped and fell striking the injured employee.

January 24, 2006 CA · Metal/Non-Metal ledgeman/hand, quarry man HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Struck by falling object

Employee was removing sand stone that had lodged on a conveyor belt. When the conveyor belt rocked, a stone fell off the belt landing on the employee's left ankle.

2005 · 1 incident

November 3, 2005 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Hanson Aggregates Pacific Southwest Inc · Fall onto or against objects

The employee was repairing a hole in Chute C-9 while using an extendable ladder. The legs on the ladder he was working on slipped out causing the employee to fall. He struck his leg on the tailguard.

2004 · 3 incidents

November 4, 2004 CA · Metal/Non-Metal outside foreman, leadman HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Over-exertion in lifting objects

The employee was moving screen panels on the deck of S-1. He was holding a flashlight in one hand; lifting one end of the screen with the other hand. His elbow made a popping sound, then became painful causing the employee to drop the screen panel he was carrying.

May 24, 2004 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Hanson Aggregates Pacific Southwest Inc · Struck against stationary object

While removing a rock from a conveyer belt with a shovel handle, the employee was struck on the left hand thumb with the other end of the shovel. The left thumb then struck the side of the conveyer.