The original dock for the 1830 Port Darlington development became too small within a decade of opening, and needed expanding. From 1839–42 under
William Cubitt and
George Turnbull's plans, the dock was expanded, and formally opened on the 12 May 1842. The dock was designed to have an entrance channel from the
River Tees to the 1:4.4 rectangular dock. The dock was expanded multiple times, growing from in 1869 to in 1902. In 1994, the training ship
Tovarisch was impounded at the dock for being unseaworthy. While moored, the ship was crewed by cadets from the
Kherson State Maritime Academy (with crews replaced twice yearly). The Ukrainian sailors played in the local five-a-side football league during this time. The ship left on 29 August 1999 for restoration in
Wilhelmshaven, Germany, under funding from the Tall Ships Friends charity and the
Ukrainian government. == Tees Valley Metro ==