California was supposed to kick off a new era of dam building when voters passed a $7.5 billion water bond in 2014. But ten years later, only one dam project from the list is still alive. Sites, which would divert water from the Sacramento River into an offstream reservoir capable of storing water for 3 million homes annually, is the sole survivor, as of Wednesday, of a batch of four new or expanded reservoirs that California officials had envisioned would bolster supplies for cities and farmers. … The string of project failures underscores an inconvenient reality: even with the rare political alignment of Gov. Gavin Newsom and President Donald Trump in support of more water storage, the numbers haven’t penciled out.