continued the work on the dam. At that date, excavation for the foundations of the wall was complete and placing of concrete about to begin. Most of the plant and equipment used for the construction of Avon Dam was dismantled and re-erected at the Nepean Dam site, including the cableways and timber towers. A suspension bridge was constructed across the Nepean River which was later used at Warragamba Dam. Railway sidings were established on the Main Southern railway line at a point between Bargo and Yerrinbool. Transport to the dam site was again by light railway, on this occasion of standard gauge. This avoided transhipment from the Government vehicles bringing materials from large commercial quarries, effectively making the line an extended privately owned siding. The line was long through gentle countryside. Trains were worked by a variety of locomotives, including a former Sydney Steam Tram Motor. Additionally, there was a system of narrow () gauge lines in use at the dam construction site. A township for workers was constructed of timber obtained from the clearing of the catchment for the Avon Dam. This township provided four and five-roomed cottages for the married men and had metalled roads with concrete kerbing. A typical working man's accommodation consisted of a simple timber hut with a galvanised roof. Later, a barracks was constructed for single men. A Public School and recreation halls were also provided, as were full-time medical staff and facilities. Shortly after construction of the dam was transferred from the Public Works Department to the Water Board, it was decided upon the recommendation of the Chief Engineer of the Board, Gerald Haskins, that the height of the dam wall be increased by . This added nearly 50% to the storage capacity of the dam. Work on the dam continued until March 1930, when the depression compelled the Board first to curtail and then suspend work completely. The work recommenced on 12 June 1933 and continued without interruption until completion of the dam in 1935. Although the dam was ready to store water by September, 1935, there was little rainfall on its catchment during the ensuing three years; however, by October 1938 the dam was overflowing. At this time it was realised that scouring at the toe of the foundations of the dam required an alteration to the direction of the flow of floodwaters discharged over the spillway weir. This was done