Esco Corp., a maker of equipment for the mining and energy industries, is closing its Portland, Oregon, factory and firing 168 workers.

The company this week told government officials that the 103-year-old plant would begin cutting jobs and closing down January 2, according to the Portland Tribune.

Company officials last year cited high operating costs for the plant, a downturn in global markets and the “challenges of operating an industrial facility in a Portland neighborhood” as reasons for closing the facility, the newspaper reported.

A state filing showed the following jobs will be eliminated, according to KOIN TV news:

Air Arc Operator – 3
Assembler – 5
Bench Person – 1
Carpenter – 2
Coremaker – 6
Crane Operator – 1
Crane Operator Hot Metal – 5
Expert Journeyman – 1
Fabricator – 5
Grinder/Fitter – 6
Heat Treating Oven Operator – 3
Hyster Driver – 1
Inspector – 5
Janitor – 6
Journeyman Technician – 3
Landfill Operator – 1
Machine Operator – 2
Machinist Manual – 5
Maintenance Mechanic – 3
Master Journeyman – 3
Melter – 4
Metallurgist Technician – 1
Molder – 15
Refractory Person – 5
Sand Technician – 1
Shipper & Order Filler – 7
Team Leader – 11
Team Leader – 10
Team Leader – 3
Truck Driver – 2
Welder – 20
Production Scheduler – 2
Maintenance Planners – 2
Accountant – 1
Manager – 2
Service Workers – 13
Administrative Assistant – 1