| MUNICIPAL |
| CMP; CMP_ELLIPTICAL; CMPA; STEEL PLATE; METAL; CMP_LINED |
| OPEN DITCH |
| SILT BASIN |
| BOX CULVERT |
| PLASTIC; PVC; PLASTIC_SDR 26 PVC; PLASTIC_FBCCP; PLASTIC_CPP; PLASTIC_SDR 35 PVC; PLASTIC_PERFORATED; HDPE; PLASTIC_PERFORATED PVC; PLASTIC_SMOOTH BORE; PLASTIC_SDR 25 PVC |
| RCP; RCP_HERCP |
| SSD |
| STEEL OR IRON; STEEL BORE; STEEL CASING |
| TILE; UNKNOWN; TILE_SEWER |
| CONCRETE TILE |
| <all other values> |