Mesabi Metallics iron mining with Komatsu PC7000-11: fleet design notes for engineers
Reviewed by Joe Ashwell
First reported on International Mining – News
30 Second Briefing
Mesabi Metallics has begun iron ore mining in Minnesota using a new cable-electric Komatsu PC7000-11 hydraulic excavator, which on 23 July loaded a 400-short ton Komatsu 980E-5 haul truck, according to dealer Road Machinery & Supplies. The PC7000-11, typically a 650–700 t class machine with a 36–40 m³ bucket, is among the first cable-electric hydraulic excavators deployed at a US mine, where electric rope shovels have been more common. The move signals growing interest in high-capacity electric loading fleets for large open pits.
Technical Brief
- Electric hydraulic excavator deployment occurs in a US market historically dominated by electric rope shovels for large pits.
- Cable-electric configuration removes on-board diesel, shifting energy supply and reliability dependence to the mine power network.
- Electric loading plant selection at Mesabi Metallics aligns with US iron ore mines’ interest in reducing diesel exposure.
Our Take
Komatsu’s 400 short ton-class 980E-5 trucks, when combined with electric loading units at a US iron operation, indicate a hybrid fleet strategy where diesel haulage remains the main residual emissions source and therefore the logical next target for trolley-assist or future battery truck trials.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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