31 23 23
Fill
31 23 19
Dewatering
31 23 16.26
Rock Remova
31 23 16.16
Structural Excavation for Minor Structures
31 23 16.13
Trenching
31 23 16
Excavation
31 23 13
Subgrade Preparation
31 23 00
Excavation and Fill
31 22 19.13
Spreading and Grading Topsoil
31 22 19
Finish Grading
31 22 16.13
Roadway Subgrade Reshaping
31 22 16
Fine Grading
31 22 13
Rough Grading
31 22 00
Grading
31 21 16.13
Methane Venting
31 21 16
Methane Mitigation
31 21 13.13
Radon Venting
31 21 13
Radon Mitigation
31 21 00
Off-Gassing Mitigation
31 20 00
Earth Moving