| Subdivision: | Newmarket |
| Mileage: | 60.32 |
| Location: | (Simcoe County, Innisfil Township) |
| Date | Event |
|---|---|
| 1903 | GTR constructs overhead bridge[GTR.ND.1907, p. 71]. |
| 1971-06-17 | New overpass officially opens. |
| Date | Image | Notes |
|---|---|---|
| 1970c |  Innisfil Historical Society, IHS 247 |
. |
| 1970c |  Innisfil Historical Society, IHS 286 |
. |
| 1970c |  Innisfil Historical Society, IHS 287 |
. |
| 1971c |  Innisfil Historical Society, IHS 1626 |
John Cowan Overpass, opening ceremony held June 17, 1971. |