Haul/Off Road/Coal/Ore/Pit/Quarry/Rock/Rubber Tire Truck Driver fatality at Moore Quarry (Martin Marietta Materials Inc.), IA, August 21, 2020

at 7:35 AM

On August 21, 2020, a haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver was fatally injured in a machinery accident at Moore Quarry (Martin Marietta Materials Inc.), IA.

Moore Quarry · Surface · Metal/Non-Metal

Operator: Martin Marietta Materials Inc. (Martin Marietta Materials Inc)

Pocahontas County, IA

Classification MACHINERY

Type Struck by falling object

Investigator narrative

Customer driver was found unresponsive outside the customer's truck. Cause of death is unknown.

Final MSHA investigation

On August 21, 2020, Dennis A. Dose, a 69 year-old tractor-trailer driver with ten years of professional over-the-road driving experience, sustained fatal head injuries while he was deploying the tarp system on his fifth-wheel side-dump trailer. After activating the automatic tarp deployment system, Dose was walking beside the trailer when the tarp system drive chain came off the sprockets. This caused the tarp roll tube to deploy uncontrolled and strike him in the head.

Read the full report (PDF)

Findings from MSHA's final investigation report, which supersedes the preliminary narrative above.

Record details

Activity at time of incident: Walking, Running
Subunit / location: STRIP, QUARY, OPEN PIT
Accident type: Struck by falling object
Source of injury: METAL,(Not Elsewhere Classified)(PIPE,WIRE,NAIL)
Nature of injury: UNCLASSIFIED,NOT DETERMED
Body part affected: HEAD,NEC
Degree of injury: FATALITY

Related fatalities

Same operator

March 5, 2025 · Welder (Non-Shop) · Martin Marietta Materials, Inc., NC
April 15, 2024 · Maintenance Man · Martin Marietta Materials Inc, CO
April 13, 2024 · Front-End Loader · Martin Marietta Materials, Inc., GA
March 22, 2016 · Outside Foreman · Martin Marietta Materials Inc., IA
February 27, 2014 · Maintenance Man · Martin Marietta Materials, Inc., IA

Same classification

July 1, 2026 · Electrician · Warrior Met Coal BC, LLC, AL
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March 12, 2026 · Maintenance Man · Kennecott Utah Copper LLC, UT
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Same year

December 15, 2020 · Maintenance Man · Rapid FM Aggregates, LLC, KY
December 14, 2020 · Laborer · Cargill Deicing Technology, LA
December 14, 2020 · Laborer · Cargill Deicing Technology, LA
November 23, 2020 · Maintenance Man · Excalibar Minerals LLC, TX
November 23, 2020 · Lw Propman · Panther Creek Mining LLC, WV

Verify on MSHA

Every record on this page mirrors what MSHA publishes under its Open Government Data program, refreshed weekly. MSHA does not publish per-accident URLs (the Accidents data is distributed as a single bulk file), so this is how to retrieve the source for the specific record below:

Final investigation report: Read MSHA's final report
Accident record: Download MSHA Accidents.zip then search for Document number 220202480023 (the unique key per MSHA Form 7000-1)
Mine record: MSHA Mine Data Retrieval System and search by Mine ID 1302188
All MSHA datasets: Open Government Data program directory covering Accident, Mines, Inspections, Violations, etc.

Source: US Mine Safety and Health Administration (MSHA) · Document 220202480023 · Mine ID 1302188 Trainer view →