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Class Code Information


Excavation – Rock – All Operations to Completion & Drivers

Includes incidental quarrying or stone crushing.


Code 5508 applies to employers engaged in the excavation of mass rock for various construction projects such as highway construction, ditch lines, quarries, basement construction, and for commercial, industrial, residential and government projects.

Assignment by Analogy

• Blasting contractors – dynamite or high explosive blasting
• Geophysical exploration – seismic                       
• Oil or gas well – perforating of casing – shooting

Operations to be Separately Rated

  1. Street construction or erection operations.  Refer to Code 5507 “Street or Road Construction – Sub-Surface Work – All Operations to Completion & Drivers” and Code 5506 “Street or Road Construction – Paving or Repaving – All Operations to Completion & Drivers.”

  2. Tunneling - Pneumatic or Not Pneumatic.  Refer to Code 6251 “Tunneling – All Operations to Completion.”

Industry Group