| Place | River Dee Bridge, Chester (St. Mary-on-the-Hill), Cheshire |
| Date | 24 May, 1847, p.m. |
| Railway Company | Chester and Shrewsbury Railway/Chester and Holyhead Railway |
| No of Fatalities | 5 |
| Cause of Accident | Collapse of bridge |
| Brief description of events | The 6.15 p.m. Chester to Holyhead train was crossing a cast iron bridge when a span collapsed. The accident brought into question the safety of cast iron. |
| Source/Bibliography/Further Reading | History of the Great Western Railway, Vol I 1833 - 1863 pp 178, E.T. MacDermott (revised by C.R. Clinker) The Times, 27 May 1847 p5 The Times, 29 May 1847 p8 |
| ANDERSON, Thomas, Locomotive fireman, died of injuries | |
| MATTHEWS, John, Llangollen, DEN | |
| NEVITT, Charles, Wrexham, DEN | |
| POWIS, Isaac, Wrexham, DEN, died of injuries | |
| ROBERTS, George, Train guard | |