HS2 railway to Birmingham passes over canal to Birmingham

Construction of the HS2 viaduct in west London has just passed over the Grand Union Canal, its 200-year-old predecessor that also links London to Birmingham.
(c) HS2
You can see the railway passing over the canal.
Both the canal and the railway were built under powers granted by Act of Parliament; arrive in the Birmingham district of Digbeth; and with similar lengths – HS2, 140miles; the canal, 137 miles – were two of the largest civil engineering endeavours of their time.
The Colne