at an estimated annual equivalent cost of $68.80 per acre-foot, including interest at 3 percent and amortization of the facilities in 50 years. The average annual acre-foot cost given is computed by using incremental costs of enlargement of part of the California Aqueduct. Appropriate allocation of costs between the California Aqueduct and the proposed incremental enlargement under this plan may reflect some increase in this acre-foot value. This plan contemplates diversion of water from several East Side San Joaquin Valley streams by relatively high elevation tunnels. Since this water is now being used downstream, exchange facilities and water supplies will be required. Approval of these exchanges will require negotiations with the downst...