Contained in a report No. 42/117 July 3rd 1956 DM1139/54 relating to the drilling and testing of this deposit the writer submitted tentative proposals and estimated costa for the mining of gypsum, subject to certain physical characterisitcs of the gypsum, and volume of water to be handled being known, in the mining of the gypsum. Subseqent test work, carried out during July 1956, for the extraction of a ten ton sample of gypsum, when the lake was inundated with 2'6" depth of water, indicated taht the water problem could be successfully handled by paddocking the area to be mined and pumping out the water overlying the gypsum. No serious seepage is anticipated either through the mud and stone banks which will be built to paddock the mining area, or from the soft underlying clay, once the gypsum has been mined. It was found however that the gypsum was too hard and consolidated to consider the mining proposal by dredging. Light blasting was necessary to extract the ten ton sample. It is prudent to record however, that this test work was of necessity, due to the depth of water on the lake, confined to the very edge of the gypsum deposit, which was only 15 inches thick in the area excavated, instead of as planned in the centre of Paddock No. 18, where a thickness of gypsum 3 feet to 3 feet 6 inches existed.