Many Lower Mainland dikes too low for catastrophic flood levels

Many of the dikes across the Lower Mainland are as much as one metre too low to withstand historic flood levels and few meet current standards for design and stability, according to provincial government documents.
Every spring is like rolling the dice that hundreds of kilometres of barriers and pumps will withstand the waters of a melting snowpack, said John Clague, a professor of earth sciences at Simon Fraser University.
All it takes is a combination of heavy snowpack, warm spring temperature