Inchgarvie's name is from "Innis Gharbhaidh" which is Scottish Gaelic for "rough island" or possibly "Garbhach's island". This island has a long history of fortification and is now incorporated into the Forth Bridge. In 1878, foundations for Thomas Bouch's Forth Bridge were laid on Inchgarvie but after the Tay Bridge Disaster these plans were abandoned. When construction of the bridge recommenced in 1882, the west end of the island was extended with a pier and used as the foundation for one of the cantilevers. The island was also used for a construction office and the castle buildings were re-roofed to accommodate workers. Some of the stone from the former castle was used to build the caissons of the bridge.