Black and white photograph showing construction of Lock 7 possibly near Renmark. Amongst the equipment are several gantry cranes and structural timbers. Also shows the way the river was blocked off to enable works to be constructed. Copy of original photograph.Historically significant showing the construction of locks on the Murray river. Use of gantry cranes.Black and white photograph showing construction of Lock 7 possibly near Renmark. Amongst the equipment are several gantry cranes. Copy of original photograph.In pencil on back "Construction of Lock 7 (near?) Renmark". "A. J. Gibbons, photo" . "Price"murray river, lock construction, gantry cranes, price collection