Division 200 — Section 204
200-24 Section 204 — Structure Excavation
204.1 Description 1 Excavate and backfill for all structures (e.g., foundations and substructures for bridges and box culverts, pipe culverts, storm drains). 204.2 Materials 204.2.1 General 1 Excavation for structures, except for box culverts and bridge foundations, is Unclassified Excavation. Excavation for structures performed in connection with foundations of box culverts and bridges are classified in Subsections 204.2.2 through 204.2.6. 204.2.2 Structure Excavation for Culverts 1 The item Structure Excavation for Culverts includes all materials excavated as necessary for the construction of reinforced concrete box culverts within the limits given in Subsection 204. 4. 204.2.3 Dry Excavation for Bridges 1 The item Dry Excavation for Bridges includes all materials excavated above the specified water elevation, except as provided under Subsection 204.2.6. 204.2.4 Wet Excavation for Bridges 1 The item Wet Excavation for Bridges includes all materials excavated below the specified water elevation and above the foundation, except as provided under Subsection 204.2.6 . 204.2.5 Wet and Dry Excavation for Bridges 1 The item Wet and Dry Excavation for Bridges includes all materials excavated when the water elevation is not shown on the Plans, except as provided under Subsection 204.2.6 . 204.2.6 Rock Excavation for Bridges 1 The item Rock Excavation for Bridges includes the excavation of hard rock as specified in Subsection 203. 2.1.7 . When the item rock excavation is included in the Contract, the material meeting the specifications for rock excavation is classified as such wherever it is found. All other materials remain unclassified, except for wet excavation for bridges, dry excavation for bridges, and wet and
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