Following the Tasman Bridge disaster in January 1975, the MTT was dramatically impacted as it did not have any depot facilities on the eastern side of the Derwent River. A temporary depot was established at Bellerive Oval while work proceeded to construct a new facility at Mornington. This included workshops and driver amenities to enable the MTT's Eastern Shore services to operate independently from the City Depot while the Tasman Bridge was being rebuilt. The Mornington Depot remained an important part of the MTT's operations following the re-opening of the Tasman Bridge in 1977, however its usage gradually decreased as operations began to be centralised at Springfield during the 1980s and 1990s. A small compound was retained for some years for use as a satellite yard before being vacated entirely.