Irwin Excavating Share: Business ServicesContractors & Construction SuppliesHome Improvements and GardeningTechnical Services Irwin Excavating Visit Website P.O. Box 192 Orofino, ID 83544 (208) 848-6102 Hours: Please call About About Contractor, excavation, grading, utility trenching, housepads, drainage, culverts, shoring, erosion control, demolition, emergency cleanup, for both commercial and residential.