Grampians Halls Gap. Part of a collection of Photographs by Mr. O.G. Armstrong as commissioned by the Shire of Stawell for the Inter-colonial and Paris Exhibition in Melbourne in 1866. From about 1860 there was agitation for a water supply, not only for Stawell but for the Wimmer Mallee as well. In 1887 Wartook was adopted as the first reservoir for the Wimmer. Stawells water supply was designed by Mr. John D’Alton. The scheme came from Fyan’s Creek via Wooden Fluming and a Syphon and finally through the mountain in a tunnel, before being piped to a reservoir on Big Hill. The system was completed in December 1881 and although there have been modifications, basically it has not been changed to this day. The Wimmera Mallee stock and domestic system from the Grampians is the largest system of its kind in the world, the latest edition being like Belfield and piping of Wimmera channels. stawell