Construction of a cofferdam nearly 800 m long at the Eastmain-1-A intake was one of his biggest challenges, says Denis Groleau, Eastmain site manager. It had to be built out from the banks of the reservoir by dumping material off the end of the advancing dam into water up to 21 m deep. Photo: Hydro-Québec Related Links: Peaceful Transition: Native people and Hydro-Québec share benefits of big project The key issue was to determine the ideal distance between the advancing face of the crushed-aggregate core and the riprap of the lateral embankments. The solution, he found, was not fancy modeling
Despite a faltering international market, 2015 and the beginning of 2016 are proving to be strong years for U.S. contractors, with steady domestic growth and only moderate strain from workforce shortages.