| Holyhead TMD | |
| Location: | Holyhead, Gwynedd |
| Grid Ref Uk: | SH249818 |
| Owner: | Transport for Wales Rail |
| Type: | DMU |
Holyhead TMD is a traction maintenance depot located in Holyhead, Gwynedd, Wales. The depot is situated on the North Wales Coast Line and is on the eastern side of the line, to the south of Holyhead station.
The depot code is HD. The carriage sidings, adjacent to the station, are coded as HC.
Around 1987, Classes 08, Class 45, 47 and DMUs could be seen stabled at the depot. The present depot was built as a one through-road shed and opened by British Rail in 1989.
There was previously a container terminal near the carriage sidings that was used by Class 08 shunters, 25 and 47 locomotives.[1] However, this closed in 1991.
As of 2016, the depot has no allocation. It is, instead, a stabling point for Transport for Wales Rail Class 67 locomotives, Class 150 Sprinters, Class 158 Express Sprinters and Avanti West Coast Class 221 Super Voyagers.