MAPLETON, Ill. (AP) – The federal Occupational Safety and Health Administration has proposed fines of more than $145,000 against Caterpillar Inc. for not installing a guardrail or travel restraint at a foundry outside Peoria where a worker fell into molten iron in June. The Peoria County coroner said 39-year-old Steven Dierkes of Peoria died instantly after falling into a crucible at the Mapleton foundry. The foundry manufactures cast iron engine components. The OSHA investigation found Wednesday that “the foundry routinely exposed employees to unprotected fall hazards” while they worked within 4 feet of containers of molten iron. Caterpillar has 15 business days penalties to comply, request a conference or contest the findings.