Plaque reads:
'HISTORIC ENGINEERING MARKER. KINGS BRIDGE
COMPLETED IN 1864 THIS BEAUTIFUL. WROUGHT IRON ARCH BRIDGE WITH A SPAN OF 60 METRES, WAS DESIGNED BYENGINEER WILLIAM THOMAS DOYNE. IT WAS FABRICATED IN MANCHESTER, ENGLAND, TRANISPORTED TO LAUNCESTON, ASSEMBLED ON A PONTOON, FLOATED INTO POSITION THE LOWERED ONTO ITS ABUTMENTS ON THESE RECEDING TIDE. THE BRIDGE PROVIDED A VITAL LINK WITH THE WEST TAMAR REGION.
THE DUPLICATE ADJOINING SPAN, FABRICATED BY SALISBURYS FOUNDRYENT LAUNCESTON, WAS SIMILARLY ERECTED AND FLOATED INTO POSITION IN 1904.
DEDICATED BY THE INSTITUTION OF ENGINEERS, AUSTRALIA, 1992'
Submitted by: @IanThorp