A fix is proposed to address sinking land beneath the Friant-Kern Canal
Probably the least expensive option, estimated to cost $150 million to $250 million, would expand the canal’s upper portion — the part visible from the surface — from about 60 feet to as much as double that width, but only along the 25-mile problem section. … An alternative approach, estimated to cost about $400 million, would be to build a nearly identical canal adjacent to the existing one in the areas that have experienced the most subsidence.