Jacob Katz, a senior scientist with the nonprofit organization California Trout, Katz is helping lead an effort to rebuild the Wallace Weir, a century-old levee northwest of Sacramento that could have transformative impacts on the rebirth of the Delta ecosystem. Levees like this one have cut off 95 percent of the historic floodplain, separating fish from their food supply and creating a “food desert in the river [that is] literally starving our salmon and smelt population. Learn More © News Deeply