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Duncan Plant Metal/Non-Metal

Alleyton Resource Co. LLC · Surface

Controlled by Summit Materials LLC

Eagle Lake, Colorado County, TX · Active

MSHA Mine ID: 4105187

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Email me when a new MSHA incident is filed at Duncan Plant.

Fatalities: 0
Total incidents: 4
Years on record: 2019–2025
Latest incident: Nov 2025

Compliance record

MSHA citations since 2016

citations

significant & substantial

$14,404

proposed penalties

$12,847

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	10,040	0	0	0.0
2025 Q3	9,365	0	0	0.0
2025 Q2	10,276	4	3	389.3
2024 Q4	783	1	0	1277.1
2024 Q2	392	0	0	0.0
2023 Q4	9,905	0	0	0.0
2023 Q2	11,377	0	0	0.0
2023 Q1	1,460	1	0	684.9

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

2025 · 2 incidents

November 13, 2025 TX · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)

Alleyton Resource Co. LLC · Struck by flying object

Employee was assisting with repairs to the dredge using a cutting tool and torch to remove a bolt. Bolt head was struck with sledgehammer causing bolt to shear and fragment penetrating employee in lower abdomen. Employee was taken to ER and transferred to another hospital where employee is currently having emergency surgery

September 27, 2025 TX · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)

Alleyton Resource Co. LLC · Struck by... (Not Elsewhere Classified)

Employees were working on replacing some pipe on the dredge and while using a pry bar to pry a gasket off, the bar slipped and hit the miner in the face causing a laceration right under the left eye which required a total of 12 stitches.

2023 · 1 incident

August 18, 2023 TX · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman POWERED HAULAGE

Alleyton Resource Co. LLC · Caught in, under or between a moving and a stationary object

Two contractors were working on a chute job on one of our sites and the main contractor was in the telehandler and their EE was working on the catwalk when the operator dropped EE's water bottle and when reached to get it, lowered the boom. Causing their EE to be pinched in between the back of the forks and the stationary I-beam

2019 · 1 incident

April 2, 2019 TX · Metal/Non-Metal mine manager, mine foreman, mine owner HANDLING OF MATERIALS

Alleyton Resource Co. LLC · Fall to the walkway or working surface

The EE was moving the swing cable to gain slack and make a connection to the anchor point, they tripped on uneven ground. The cable was in hands, waist level when they tripped. EE dropped it and caught themselves with their hands.The EE felt immediate pain in right shoulder. EE was taken to the doctor and prescribed pain medicine, muscle relaxers, and physical therapy.