California Adds ‘Delta Tunnel’ to List of Possible Water Supply Solutions

California officials are studying whether a 35-mile tunnel under the Sacramento-San Joaquin River Delta might help solve some of the state’s water supply problems. Teresa Engstrom, chief of the delta engineering branch at the California Department of Water Resources, confirmed that the agency is conducting feasibility studies on an “all tunnel” option that would route water under the Bay Delta from rivers and reservoirs to the north of Sacramento to farms in the south.