In Buenos Aires, Argentina, under contract to Impregalla Healy, AUS provided consulting, design, and direct supervision of underwater concrete placement in the four drop shafts required for the implementation of the tunnel machine. AUS was involved in the development of the underwater requirements including the safety plan, excavation, survey, rebar, and drain installation components in
August 2013 AUS conducted a survey of the Twin Falls Powerhouse tail race tunnel between August 6 and August 8,2013. The condition of the tunnel was documented by ROV video and scanning and imaging sonars. After analysis of the information provided by the survey, thetunnel was found to be in good condition with no significant
AUS worked closely with Barnard Construction, providing the operational marine support required for installation of the 450-ton Lower Level Outlet Works cofferdam assembly. Services included pre construction survey, including bathymetric profile and dam face profile, assembly and operation of lift barges, transport and assembly of cofferdam sections, setting cofferdam sections, drilling and installation of Williams rock
