(orginally pub 2/20, edited 2/29.) From his driveway along the Sacramento River south of Freeport, the view to the east offers a peek at the snow-capped Sierra Nevada. When that snow melts, it flows relentlessly by, just across the levee road from Stone's front windows. From the state and federal governments' point of view, his 20-acre property in the Sacramento-San Joaquin Delta is an ideal spot for one of the five large pumping stations they're proposing to feed what may be the largest water tunnel ever contemplated in North America. ....Twin 33-foot-diameter tunnels would carry a portion of the Sacramento...