A proposal to build a 42-mile long, 400-ft-wide water conveyance canal soundly rejected by California voters in 1982 is rising from the mists of the Sacramento-San Joaquin Delta again. It is driven this time, in large part, by a heightened appreciation for risk and the physical fragility of the state�s water supply. Consider it a legacy of Hurricane Katrina. California Dept., of Water Resources Delta�s maze of tributaries and sloughs is major source of water Tom Sawyer / ENR When levees breach in the delta, islands disappear. A bypass canal would ensure a stable water supply. �Not long ago, risk