 While state of the art materials @-@ handling methods were used , in some instances labour @-@ saving machinery worked beside operations intended to <unk> the labour content . <unk> workers were employed chiefly for on @-@ site preparation , road construction , foundation excavation , clearing timber from the reservoir basin , and on some <unk> operations . <unk> workers were required on the dam for fixing the <unk> where the concrete was poured . These workers were probably employed at normal day labour rates , the main employment method used on the project . <unk> handling of cement was also used for the first time in Australia , this saw a significant saving as opposed to <unk> cement which was the standard practice of the day . 
