 The construction of Canning Dam ended a long period during which Perth 's water supply was generally unsatisfactory in quality ( either due to salinity or bacterial pollution or both ) and in quantity . The project , the biggest public works program of the decade , stimulated significant growth in the local economy and provided desperately needed work for around five hundred men . 
 The construction of Canning Dam ended a long period during which Perth <a href='null_genetive' title='1'><mark>'s</mark></a>water supply was generally unsatisfactory in quality ( either due to salinity or bacterial pollution or both ) and in quantity . The project , the biggest public <a href='uninflect' title='2'><mark>works</mark></a> program of the decade , stimulated significant growth in the local economy and provided desperately needed work for around five hundred men . 
The construction of Canning Dam ended a long period during which Perth  water supply was generally unsatisfactory in quality ( either due to salinity or bacterial pollution or both ) and in quantity . The project , the biggest public work program of the decade , stimulated significant growth in the local economy and provided desperately needed wrk for around five hundred men .