HPA is responsible for the removal of two existing culverts (11 and 16) and replacing them with new water control structures, providing flood protection and irrigation to the surrounding community, as part of the Herbert Hoover Dike. HPA’s scope of work for the approximately three-year-long project will include demolition of two existing culverts, placing lengths of cutoff wall to close the existing gaps in the existing cutoff wall at the culvert locations, placement of new cast-in-place concrete culvert structures with gates and control systems at the same locations, and restoring the embankment. Scope of work will also include construction of cofferdams, de-watering, re-watering upon completion of the new culvert structures, removal of the cofferdams, and installation of new riprap at the culvert locations.
