Avista Cabinet Gorge Gantry Crane

Cabinet Gorge Dam, located on the Clark Fork River in Idaho, is home to four massive turbine generators each weighing 275 tons. Due to the massive weight, it is crucial that the crane lifting these turbines is functioning correctly. Our client, Avista Corporation invited the Coffman team to provide a mechanical, electrical, and structural engineering evaluation and onsite assessment in order to develop construction costs, to compare rehabilitation costs against replacement cost estimates to modernize or replace their aging crane. Through the study and assessment, as well as working with crane manufacturers, reviewing original crane and site layout drawings, operating manuals, and maintenance inspections, Coffman completed a comprehensive evaluation and provided recommendations.


  • Industrial


  • Industrial Design
  • Electrical Engineering
  • Structural Engineering
  • Crane Design
  • Land Surveying