Gallrock River Culvert
| Structure No | 40572 |
| Structure Name | Gallrock River Culvert |
| Last PI Date | 22-Nov-2013 |
| Next PI Date +/- 6 Month | 05-Sept-2019 |
| Last GI Date | 30-Sept-2011 |
| Next GI Due +/- 6 Month | 24-Oct-2015 |
| Route | M1 |
| X | 293717 |
| Y | 360133 |
| Spanning | Watercourse |
| Orientation | W-E |
| Skew | 5.00 |
| Span Length | 3.70 |
| Structure Type | Underbridge – Box Culvert |
| Joint Type | – |
| Parapet | Concrete |
| Construction Year | 1962 |
| HA_Rating | 40 |
| HB_Rating | 45 |