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| CSI Code | Short Description | Extended Description |
| 02600 | Drainage and Containment |
| 02610 | Pipe Culvert |
| 02620 | Subdrainage | Foundation Drainage Piping Geocomposite Drains Geotextile Subsurface Drainage Filtration Pipe Underdrain and Pavement Base Drain Retaining Wall Drainage Piping Subgrade Drains Tunnel Drainage Piping Underslab Drainage Piping |
| 02630 | Storm Drainage | Catch Basins , Grates, and Frames Combination Storm Drain and Underdrain Inlets Storm Drainage Manholes, Frames, and Covers Storm Drainage Pipe and Fittings Water Detection Chambers |
| 02640 | Culverts & Manufactured Construction | Concrete Arch Buried Bridge Metal Pipe - Arch Cluverts Metal Plate Culverts Precast Reinforced Concrete Arch Culverts Precast Reinforced Concrete Box Culverts Precast Reinforced Concrete Rigid Frame Culverts |
| 02660 | Ponds and Reservoir | Cooling Water Ponds Distribution Reservoirs Fire Protection Reservoirs Leaching Pits Pond and Reservoir Covers Pond and Reservoir Liners Retention Basins Sewage Lagoons Stabilization Ponds |
| 02670 | Constructed Wetland |
