Mineral exploration company Thomas Resources admits it left garbage in the woods near the site of Corner Brook's watershed.
Some snowmobilers removed wire and several large nylon bags from the area.
Rod Mercer, a project manager with Thomas Resources, said copper wire and connectors left behind from surface blasting should never have been left behind.
"With regard to the wire, it should have been picked up," Mercer said.
"There's no excuse for it not being picked up and we're certainly investigating that."
Mercer said the large nylon bags were meant to remain at the site, but he said they were not properly labelled.
The company has plans to drill for minerals in the area, but the proposal has not yet been approved by Corner Brook city council.