Mott MacDonald
Mott, Hay & Anderson
### Mott, Hay \& Anderson

[thumb\|right\|A picture of a City \& South London Railway train from the [Illustrated London News](/wiki/Illustrated_London_News "Illustrated London News"), 1890](/wiki/File:Electric_railway_train.jpg "Electric railway train.jpg")
Mott, Hay and Anderson was founded as a private partnership between [Basil Mott](/wiki/Basil_Mott "Basil Mott") and [David Hay](/wiki/David_Hay_%28engineer%29 "David Hay (engineer)") in 1902, with the original firm name of Mott \& Hay. Prior to forming the original partnership, Mott and Hay had spent time building [London tube railways](/wiki/London_Underground "London Underground") and Hay had worked on the [Blackwall Tunnel](/wiki/Blackwall_Tunnel "Blackwall Tunnel"). Both engineers had worked together since 1888 on the [City \& South London Railway](/wiki/City_%26_South_London_Railway "City & South London Railway") under [Sir Benjamin Baker](/wiki/Benjamin_Baker_%28engineer%29 "Benjamin Baker (engineer)") and [James Henry Greathead](/wiki/James_Henry_Greathead "James Henry Greathead"). Early projects included the reconstruction and extension of the City and South London Railway (C\&SLR), the building and extension of the Central London Railway, the construction of lifts beneath [St Mary Woolnoth](/wiki/St_Mary_Woolnoth "St Mary Woolnoth") church at [Bank tube station](/wiki/Bank_tube_station "Bank tube station"), the underpinning of Clifford's Tower, the reconstruction of [Southwark Bridge](/wiki/Southwark_Bridge "Southwark Bridge") and the widening of [Blackfriars Bridge](/wiki/Blackfriars_Bridge "Blackfriars Bridge"). Mott and Hay employed a young engineer called David Anderson as resident engineer for the latter project.

The firm also advised on proposals for underground railways in [Sydney](/wiki/Sydney "Sydney"), Africa, and Russia. [David Anderson](/wiki/David_Anderson_%28engineer%29 "David Anderson (engineer)") was made a partner in 1920 after returning from army service. The firm was thereafter known as Mott, Hay and Anderson. During the 1920s, it designed the rolling bridge over the [River Dee](/wiki/River_Dee%2C_Wales "River Dee, Wales") at [Queensferry](/wiki/Queensferry%2C_Flintshire "Queensferry, Flintshire"), the [Tyne Bridge](/wiki/Tyne_Bridge "Tyne Bridge") in [Newcastle](/wiki/Newcastle_upon_Tyne "Newcastle upon Tyne") and the [Trent Bridge](/wiki/Trent_Bridge_%28bridge%29 "Trent Bridge (bridge)") in [Nottingham](/wiki/Nottingham "Nottingham"). It also designed the enlargement of the [City \& South London Railway tunnels](/wiki/City_%26_South_London_Railway "City & South London Railway") and their extension past [Camden Town](/wiki/Camden_Town_Tube_station "Camden Town Tube station") and [Clapham South](/wiki/Clapham_South_tube_station "Clapham South tube station") to form the [Northern line](/wiki/Northern_line "Northern line") of the [London Underground](/wiki/London_Underground "London Underground").

Both founding partners died in 1938, at which time most of the construction projects stopped. During the 1940s after [World War II](/wiki/World_War_II "World War II"), it began expanding and working on additional projects, some of which including repairing of roads and bridges damaged or destroyed during the war, and, later, included the [Victoria line](/wiki/Victoria_line "Victoria line") of the London Underground and Australia's [Melbourne Underground Rail Loop](/wiki/City_Loop "City Loop"). The firm continued in these fields until the merger with Sir M MacDonald \& Partners in 1989, at which time it was also working on the [Channel Tunnel](/wiki/Channel_Tunnel "Channel Tunnel") between the United Kingdom and [France](/wiki/France "France") beneath the [English Channel](/wiki/English_Channel "English Channel").


What was the name of the merger that Mott, Hay & Anderson was involved in?