ocr: Bob Webb, al hydrologist with the United States Grand Canyon National Park. "One ecosystem Geological Survey, "mainly because Glen Can- was destroyed and replaced by another." yon Dam, 113 miles upstream, constrains the Colorado's flow to somewhere between 5,000 LEN CANYON DAM is a hangover from and 20,000 dam, cubic feet of of more water than per 120,0000 second." cfs G early states served 20th-century by the water Colorado wars among River Before the flows piled through rapids, rearranging rocks likea and its tributaries. With thirsty California at cue ball disperses billiards. the end of th ...
