| Section of Line | Opened | Closed | Notes |
|---|---|---|---|
| Junctions and other features | Running Lines | Stations, Signal Boxes and Junctions | Distance from Signal Box above | Loops and Refuge Sidings | Notes | |
|---|---|---|---|---|---|---|
| 1 | ↕ | Johnston (Pem.) Stn. | – | CL 39 | ||
| 2 | — | ↕ | Milford Haven Station | 3m 1551yds | CL 75 | |