Abstract: At approximately 7:00 a.m. on October 1, 2009, Employee #1 was operating a Caterpillar Model Number 324D track hoe, and his coworker was operating a Caterpillar Model Number 330D track hoe. The employees were using the track hoes for an excavation operation (digging and back filling a creek), involving laying of gas pipes at a new construction site. The employees continued working until their lunch break at approximately 11:30 a.m. Shortly after their lunch break, Employee #1 and his coworker noticed that the maintenance truck (grease truck) arrived onsite. The coworker moved his track hoe near the grease truck for service. The two employees on the grease truck maintenance crew started changing the oil and replacing filters on the coworker's track hoe. As the maintenance crew was servicing the coworker's track hoe, Employee #1 positioned his track hoe to the side of his coworker's track hoe, approximately 3 feet away. Employee #1 immediately started to service his track hoe, while standing between the two adjacent track hoes. At the same time that Employee #1 was attempting to change his air filter, the coworker started his engine and rotated the track hoe to the left, consequently causing the counterweight to squeeze Employee #1 between the two track hoes. Caldwell Parish Sheriff Department was notified about the accident at 12:56 p.m., and the deputy arrived onsite at approximately 1:17 p.m. Emergency medical services arrived on the site at approximately 1:17 p.m. The coroner pronounced Employee #1 dead at the scene. At the time of accident, the weather was sunny and warm.