Defect Detectors
| Railroad | Sub Division | Frequency | Mile Post | Location |
|---|---|---|---|---|
| Burlington National Santa Fe | Beardstown Sub | 161.100 | 138.2 | Centrailia |
| Canadian National | Centrailia Sub | 161.190 | 258.7 | Irvington |
| Canadian National | St. Louis Sub | 160.92 | 51.7 | Coulterville |
| Canadian National | St. Louis Sub | 161.190 | 23 | Freeburg |
| CSX | St. Louis Line | 161.100 | QS 233.8 | Fairmont City |
| CSX | St. Louis Line | 160.980 | QS 228 | Collinsville |
| Norfolk Southern | Southern West Division | 160.830 | 48.8 | Bartelso |
| Norfolk Southern | Southern West Division | 160.830 | 55.6 | Hoffman |
| Norfolk Southern | Southern West Division | 160.830 | 13.2W | Belleville |
| Norfolk Southern | Southern West Division | 160.830 | 24.9 W | SAFB |
| Union Pacific | Pinckneyville Sub | 160.410 | 96.5 | 6 miles east of Tamaroa |