By Ben Tracy, Andy Bast, Chris SpinderWith the federal government poised to force Western states to change how they manage the alarming shortfall in Colorado River water, there is one constituency with a growing interest in the river's fate that's little known to some: Wall Street investors. Mueller's job is to protect Colorado's share of the river, which flows through seven states and is an important water source for cities including Denver, Salt Lake City, Albuquerque and Los Angeles. "Good stewards of the land and stewards of the water rights will have their eyes open," Bernal says