| Three Bridges | |
|---|---|
 View from the canal showing the road (upper level) and the crossing railway line | |
| Type | Bridges |
| Location | Southall |
| Coordinates | 51°30′16″N 0°21′20″W / 51.5044182°N 0.3554333°W |
| OS grid reference | TQ 14246 79655 |
| Area | London Borough of Ealing |
| Built | 1859 |
| Architect | Isambard Kingdom Brunel |
| Official name | Windmill Bridge |
| Designated | 26 January 1970 |
| Reference no. | 1002020 |
  Location of Three Bridges in London Borough of Ealing | |
Three Bridges, formally known as Windmill Bridge, is a three-level crossing of bridges near Hanwell in west London, England.[1] The project was Brunel's last to be finished before he died on 15 September 1859.
Designed by Isambard Kingdom Brunel, the two cast iron bridges are arranged to allow the routes of the Grand Junction Canal, Great Western and Brentford Railway, and Windmill Lane to cross each other, with the road above the canal which is above the railway.[2]
As the railway was the most recent addition, the design allowed the railway to be in a deep cutting so it wasn't visible from and didn't enter Osterley Park as well as being economically cheaper.[3][4][5] Work began in 1856, and was completed in 1859.[4]
The structure is a scheduled monument and is adjacent to a homonymous park[6]
