U.S. Dept. of Interior, National Park Service, Lassen Volcanic National Park, Headquarters

An employee was cleaning a cordless drill. As they applied brake fluid to the drill and pulled the trigger, the fluid ignited. The employee suffered burns to the face, hands, and arms.

An employee was welding on a rack when sparks ignited residual diesel on his pants. The employee sustained first-, second-, and third-degree burns.

An employee was spraying glue to the floor of an enclosed cargo trailer. The fumes made contact with the heater causing a flash fire. The employee suffered burns to their face and right hand.

An employee was replacing a valve in the gas line to the fryer. The shutoff valve malfunctioned resulting in a gas leak that then ignited. The employee sustained burns requiring hospitalization.

An employee was using a torch when a hole in the oxygen line leaked gas that then ignited. The employee sustained burns to the left palm and wrist.

After completing a fitness test, an employee experienced lower leg pain and an inability to walk. The employee was hospitalized for compartment syndrome in both legs.

An employee was cutting up a large tree that had blown down on a rocky ledge on a hill. He began cutting on the uphill side of the tree, but due to obstructions he had to move to the downhill side. The tree separated from its 7-foot root ball, which started sliding toward him. While attempting to get out of the way, he tripped and fell to the ground, striking his head on an unknown object. As the root ball continued to move toward the employee, he made it below the level of the rock ledge. The root ball rolled over when it reached the ledge and pinned the employee's lower leg, and broke his fibula. He also suffered scrapes and bruises from the fall.

An employee was walking on a trail in a national park and stepped onto an angled and flat slab of granite when her ankle rolled and her weight shifted, but she did not fall. She was hospitalized with a fractured tibia and fibula and a dislocated ankle.

An employee was offroad, looking for a lost hiker. The employee fell off a canyon rim edge and landed on rimrock 5 or 6 feet below, suffering a separated shoulder and a head injury that required stitches. The employee was hospitalized.

An employee was preparing to conduct maintenance on a riding lawn mower and lifted the mower deck upward to its vertical position with assistance from another employee. A third employee pulled a locking pin, causing the front wheel mount to move forward into the cab. The cab entrance hand hold crushed the little fingers on the injured employee's hands. The employee was hospitalized and required surgical amputation of the right little finger to the second joint, as well as debriding and stitches to the left little finger.

The injured employee was assisting a Department of Homeland Security (DHS) enforcement operation. During an apprehension, officers returned fire at a subject and struck the employee with a bullet. The employee sustained a gunshot wound to their right hand.

The injured employee was assisting in the disassembly phase after a radar array had been lowered and secured. The crew began removing load bearing pins from an overhead crane to free the radome. A load bearing pin was stuck. The injured employee went to remove the pin manually as a second team member applied pressure from the opposite side. The pin unexpectedly released and struck the injured employee s right thumb, resulting in partial amputation of the distal phalanx including an open distal phalanx fracture and nail bed laceration.

An employee was working on an electrical panel in a mechanical room when an arc flash occurred. The employee suffered burns.

At about 3:10 p.m. on October 3, 2025, an employee was inspecting a car. Two dogs that had been in another car were leashed and tethered to a bollard. As the employee inspected the first car along with a narcotics detection dog, one of the other dogs came loose and attacked the narcotics dog. The employee was separating the dogs when the other dog bit his left ring finger. The last joint of the finger was injured and part of it was bitten off.

An employee was preparing a bundle of green onions for chopping. While holding the bundle in his left hand, he made his first cut using a 9-inch kitchen knife held in his right hand. The knife contacted the tip of his left thumb, resulting in an amputation of approximately 0.5 inches of the thumb that required hospitalization.