Two years after Lake Mead hit an all-time low and concern swelled for the Colorado River’s long-term sustainability, water managers and lawmakers generally see a healthier basin. But that didn’t come without sacrifice in Las Vegas. Two years after Lake Mead hit an all-time low and concern swelled for the Colorado River’s long-term sustainability, water managers and lawmakers generally see a healthier basin. But that didn’t come without sacrifice in Las Vegas. Environment Phys.org – latest science and technology news stories