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COMMENTS: Colorado Cooler
The images of the day came from the Colorado River in Arizona. Both NBC and CBS sent a reporter to Lake Powell, where a 60 hour experiment will release water and sediment through the Glen Canyon Dam at the rate of 300,000 gallons each second in an attempt to revive the Grand Canyon's ecosystem of sandbars. CBS' Ben Tracy told us the benefits of the dam for humans, providing water for 20m and hydropower for 400,000 households. NBC's John Larson described the ecological damage since it was built in 1963: "The Colorado River, which used to be warmer and muddier, became clearer and cooler. The dam cut off the river's natural source of sand and sediment…Vegetation disappeared. Animals and fish went extinct."
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