Just weeks before key votes on a multibillion-dollar state water project, two major questions remain: How much water will the project actually deliver? How much will that water actually cost? If those sound like the only two things you’d really want to be sure about before investing billions of dollars in a new water project – well, they are.The project, known as WaterFix, is designed to ensure that water keeps coming south through the Sacramento-San Joaquin Bay Delta, a series of waterways and wetlands fed by snow melting in the Sierra Nevada mountain range.