The depot work follows Stadler winning a contract to manufacture and maintain a new fleet of 52 metro trains for Merseytravel and Merseyrail for the Liverpool city region. BAM Nuttall worked with Stadler during the tender stage.
The Kirkdale facility will include washing and stabling facilities, maintenance shed with run-through tracks, office space, and a simulator suite. The design includes potential for the depot to be extended for 80-metre long trainsets.
The depot at Birkenhead North will also have a new washing facility put in so it will be possible to clean the trains on the Wirral line (Birkenhead North) and the Northern line (Kirkdale).
The depot works are expected to be completed in 2019, in time for the arrival of new vehicles for testing.
The total value Stadler's agreements, including the depot construction works, is £700m. The deal also includes an option clause for the production and maintenance of an additional 60 units, further increasing the total value of the contracts if exercised.