Nissen Gravel Mine Metal/Non-Metal

BURNCO Colorado LLC · Surface

Controlled by Burnco Rock Products Ltd

Firestone, Weld County, CO · Active

MSHA Mine ID: 0504915

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Compliance record

MSHA citations since 2008

citations

significant & substantial

$7,372

proposed penalties

$7,372

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	Per 1M hrs
2025 Q4	6,283	0	0.0
2025 Q3	6,063	0	0.0
2024 Q4	5,267	1	189.9
2024 Q3	5,899	0	0.0
2024 Q1	7,096	1	140.9
2023 Q4	6,781	0	0.0
2023 Q3	7,229	0	0.0
2023 Q2	6,848	0	0.0

Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.

No fatalities recorded at this mine.

1 on file

October 15, 2020 CO · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS

BURNCO Colorado LLC · Over-exertion in lifting objects

Laborer was standing in the mud picking shack. EE felt pain in EE's elbow while removing mud clods from the conveyor belt.