| Date | Event | Source | Notes |
|---|---|---|---|
| 1872-06-14 | Incorporated. Canada Act 35 V Chap 83 | CNRHist | |
| 1884 | Line opened Coteau to Coteau Landing - 2 miles | CNRHist | |
| 1885 | Line opened Clarks Island to Lacolle - 43.5 miles | CNRHist | |
| 1889 | Line opened Lacolle to international boundary - 7.75 miles | CNRHist | |
| 1890-02-01 | Bridge over the St. Lawrence opened. | CNRHist |