Engine 76 from Mill Creek was driving back to their station when they witnessed a vehicle hit a dog on 180th Street Southeast near Highway 9.
The fire crew pulled over and jumped into action, placing the dog on a backboard and rescuing her from the ditch where she landed.
The dog had serious injuries, fire officials say, and was transported to the Clearview Animal Hospital up the street from where the accident occurred.
Witnesses, including the driver who struck the dog, also pulled over to provide aid. The dog's owner was contacted and followed Engine 76 to the hospital.
Vets at Clearview Animal Hospital worked to save the dog's life, and while she still has injuries that are being treated, is recovering at home.