| Naics index | Naics index description |
|---|---|
| 237990 | Railway construction (e.g., interlocker, roadbed, signal, track) |
| 237990 | Railway roadbed construction |
| 237990 | Recreation area, open space, construction |
| 237990 | Recreational vehicle park construction |
| 237990 | Retaining walls, anchored (e.g., with piles, soil nails, tieback anchors), construction |
| 237990 | Revetment construction |
| 237990 | Riprap installation |
| 237990 | Rock removal, underwater |
| 237990 | Seawall, wave protection, construction |
| 237990 | Sediment control system construction |