Waka Kotahi infrastructure delivery regional manager Jo Wilton said contractors have encountered challenging ground conditions along the site, including the recent discovery of peat on the Resolution Drive extension. An 800m section of the four-lane highway also had to be redesigned and raised due to the unanticipated growth of an algal material in the subsoil drainage network south of Ruakura. MARK TAYLOR/Stuff Contractors work on the Hamilton section of the Waikato Expressway, looking south from Osborne Road. Hamilton-based National MP David Bennett said the Government has failed to provide the construction industry with a pipeline of major projects and this has caused contractors to take a “go slow” approach.