National Trust chief executive officer Julian Donaldson stated at the time that Be Our Guest, owner of the Dome cafe brand, had presented an “inspired vision that respects the heritage values of the site

Be Our Guest owns Dome hey? Interesting little nugget.

Found a Collie Roundhouse Visioning Report by H+H Architects for National Trust of WA - pdf

CY O'Connor pushed hard for the project apparently.

BACKGROUND The significant role rail played in the emergence of Collie as a source of coal for Western Australia is highlighted by the infrastructure that remains in the town of Collie, with the Roundhouse and Turntable and the Railway Goods Shed (c1898) and Footbridge (c1912) being key components. Collie Coal was discovered in Collie in 1883 but was not immediately exploited because of the dominance of the eastern states coalfields and the lack of a railway to transport the coal from Collie to Bunbury. The Collie town site was declared in 1896.

The South West railway line was completed in 1893 and the line from Brunswick to Collie in 1898. Access to rail transport launched Collie and the coal industry on a sound basis and boosted settlement in the district. The important role that the engineer-in-chief and acting general manager of railways in Western Australia, Charles Yelverton (CY) O’Connor played in establishing the Collie coalfields is often overlooked. He pushed hard for the building of the line from Brunswick to Collie and argued convincingly for the use of local coal so that WA would be independent of the unreliable Eastern States coal supply. Turntable and Roundhouse.

Little detail is included in the assessment of significance documentation for the place... ...It was reported in June 1947 that ‘a new turntable 80ft long’ was located in Collie.

The Collie Roundhouse is a post-war building which housed 14 steam locomotives. It remains intact complete with turntable pit and turntable. It is thought to be the last extant Roundhouse in Western Australia.