FORT STOCKTON ??On a weedy patch of dirt in dusty West Texas, a veteran water man named Alan Murphy and Fort Stockton City Manager Raul Rodriguez were examining the product of their partnership: a lonely looking water well on a bit of forsaken city property. Recent rains had filled up the shallow pit around the stoppered well; last time, they?d had to fish out a dead rodent. Now the men were explaining that, if the right investor steps up, this modest well could be key to the biggest water deal in North America…