31 50 00
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Excavation Support and Protection
Includes permanent and temporary support of excavations and excavation enclosures, such as cofferdams, for construction below water and in water.

31 50 00 Excavation Support and Protection
31 51 00 Anchor Tiebacks
31 52 00 Cofferdams
31 53 00 Cribbing and Walers
31 54 00 Ground Freezing
31 56 00 Slurry Walls