For the first time, secondary treatment of wastewater in Victoria, British Columbia, could become a reality. Image: Courtesy of Victoria’s Capital Regional District. The city’s new plant, rendered above, rejects the premise that secondary wastewater treatment is unnecessary because the water turbulence in the Juan de Fuca Strait dilutes discharged effluent. The minister of environment for the province of British Columbia approved the Capital Regional District’s (CRD) Core Area Liquid Waste Management Plan in August. Andy Orr, communications manager for the district, says a request for proposals on a new $738-million wastewater treatment facility will go out this fall. Construction
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.