Experience a new standard of dirtwork.

Castlerock Excavating is a leading excavation general contractor. We are located in Billings, Montana and you’ll find many of our successful projects in our Montana and Wyoming service area.

Licensed. Bonded. Insured.


  • Sewer, Stormwater, and Water Installation
  • Grading & Site Work
  • Foundations
  • Pipe Bursting



Install new pipelines in the same or larger diameter with minimum excavation. more >

We have over 25 years of experience in all types of excavation projects throughout the region. We strive to deliver the highest level of service in the industry at a competitive price. more >