Inner Tay Estuary viridis" - a species normally found only in north-eastern North America. Scottish Natural Heritage has commissioned and published habitat survey reports for the Inner Tay Estuary. Public roads run within a few hundred metres of the both north and south shores providing easy access to view the estuary and its wildlife, though car parking is limited in many places: (south shore) Wormit, Balmerino, Newburgh, Elcho Castle; (north bank) Riverside Drive in Dundee by the railway bridge, Invergowrie, Kingoodie, Port Allen, Powgavie, Cairnie Pier; (in Perth) from both banks, the bridges, Moncreiffe Island; (in Bridge of Earn) the bridge. The minor
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