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Dewey Plant Metal/Non-Metal

MDI Mining · Surface

Controlled by Michael Denny

Mesa, Yavapai County, AZ · Active

MSHA Mine ID: 0202633

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Fatalities: 0
Total incidents: 4
Years on record: 2006–2020
Latest incident: Aug 2020

Compliance record

MSHA citations since 2000

306

citations

109

significant & substantial

$108,320

proposed penalties

$82,339

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	3,093	0	0	0.0
2025 Q3	4,318	0	0	0.0
2025 Q2	3,525	2	0	567.4
2025 Q1	3,363	0	0	0.0
2024 Q4	3,576	4	0	1118.6
2024 Q3	4,085	2	1	489.6
2024 Q2	4,301	9	3	2092.5
2024 Q1	4,540	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

2020 · 1 incident

August 10, 2020 AZ · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS

MDI Mining · Struck by flying object

Employee was operating Jaw Crusher mining machine when the jaw became plugged. The employee was attempting to unplug the jaw when a piece of rock/debris flew from the machine and struck the employee in hard hat, penetrating the PPE. The impact caused a laceration in the employee's forehead.

2008 · 1 incident

February 19, 2008 AZ · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator SLIP OR FALL OF PERSON

MDI Mining · Fall onto or against objects

Loss of footing and slipped off ladder, striking robs on upper deck. Rib contusion on his left side.

2007 · 1 incident

March 12, 2007 AZ · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver POWERED HAULAGE

MDI Mining · Struck against a moving object

Hauling 4000 gallons of water up steep grade, truck came out of gear. Operator, unable to get it back in gear, decided to back truck down the hill. Watching for traffic on the right, he negotiated a turn to the left going backward. He failed to see a high spot on the bank and the left drive tires went up on this spot causing the water to shift laying the truck on its side.

2006 · 1 incident

December 7, 2006 AZ · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver SLIP OR FALL OF PERSON

MDI Mining · Fall onto or against objects

Injured was conversing with excavator operator about loads while standing on track. Injured then tried to step off track facing forward instead of using foot steps. He lost his footing and slid down track causing abrasions to his lumbar area. The grouser on the track pad causing the most abrasion and discomfort.