Trapper Mining said the first incident occurred at around 3am on August 5 when two pieces of heavy mobile equipment collided.

According to data from the US Mine Safety and Health Administration, the employee was injured when the motor grader he was operating was struck by a haul truck.

Trapper said the operator of one vehicle was injured with non-life-threatening injuries, according to the Craig Daily Press.

The second injury was sustained by a maintenance employee performing a routine procedure, Trapper said.

The MSHA data details that the employee was pulling a jack stand into place when he felt pain in his left wrist and noted immediate swelling. It was determined to be a wrist sprain and the employee was provided with a splint.

MSHA says both injuries only resulted in “days away from work” and were the fifth and sixth injuries reported from the mine this year.

Trapper said both employees were expected to fully recover and both accidents were promptly reported and were being fully investigated.

The Trapper mine is a coal mine near Craig in northwestern Colorado that supplies the Yampa project, an adjoining 856 megawatt coal-fired power station.

On its website the Platte River Power Authority, which operates Yampa, states that the mine "is the primary coal supplier" for the plant and is owned under the same partnership.

The plant is jointly owned by Platte River, Tri-State Generation & Transmission, Xcel Energy, the Salt River Project and PacifiCorp.

According to MSHA, the mine has been operated by Trapper Mining since 1973.