Western Drought Enlarges 'Bathtub' Ring Around Lake PowellThe man-made lake is at risk of recording its lowest level since its creation.A bleached "bathtub ring" is visible on the rocky banks of Lake Powell on March 28, 2015 in Lake Powell, Utah. Getty ImagesPrintMarch 29, 2015, 4:16 PM UTC / Updated March 29, 2015, 4:19 PM UTC / Source: NBC News