31.23.00 Excavation and Fill
31.23.19 Dewatering
31.23.13 Subgrade Preparation 31.23.16 Excavation 31.23.16.13 Trenching 31.23.16.16 Structural Excavation for Minor Structures 31.23.16.26 Rock Removal 31.23.19 Dewatering 31.23.23 Fill 31.23.23.13 Backfill 31.23.23.23 Compaction 31.23.23.33 Flowable Fill 31.23.23.43 Geofoam 31.23.33 Trenching and Backfilling