River Tay naturally. To aid this process and improve the health and resilience of the population a further 28 beavers will be released in Knapdale between 2017 and 2020, however there are no plans at present to release further beavers into the Tay. In the 19th century the Tay Rail Bridge was built across the firth at Dundee as part of the East Coast Main Line, which linked Aberdeen in the north with Edinburgh and London to the south. The bridge, designed by Sir Thomas Bouch, officially opened in May 1878. On 28 December 1879 the bridge collapsed as a train passed
Tay Bridge disaster allowance for wind loading for spans less than , whilst noting this was for the design of girders not piers. Evidence was taken from scientists on the current state of knowledge on wind loading and from engineers on the allowance they made for it. Airy said that the advice given was specific to suspension bridges and the Forth; could act over an entire span of the Tay Bridge and he would now advise designing to (i.e. with the usual margin of safety). The highest pressure measured at Greenwich was ; it would probably go higher in Scotland. Sir George Stokes