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The Colorado River and its deeply entrenched canyons create a lengthy barrier to travel in the interior West. Here and there, ancient Indian foot trails descend canyon walls and find access to the river, but one of the few places between California and Nevada where wheeled vehicles can approach it is at the mouth of the Pahreah River, between Glen Canyon and the river's steep drop toward Grand Canyon. Here, from the mid-19th until well into the 20th century, Lee's Ferry was a primary link between Utah and Arizona. Mormons trying to reach potential Indian converts and new lands

Lees Ferry (Ariz.) --- History. --- Annals --- Auxiliary sciences of history

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Hydrogeology --- Groundwater flow --- Pipe Spring National Monument (Ariz.) --- Arizona

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Airplanes --- Noise pollution --- Noise --- Government policy --- Government policy --- Grand Canyon National Park (Ariz.)

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Hydrogeology --- Hydrogeology --- Groundwater flow --- Groundwater flow --- Groundwater flow. --- Hydrogeology. --- Pipe Spring National Monument (Ariz.) --- Arizona

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Airplanes --- Noise pollution --- Noise --- Government policy --- Government policy --- Grand Canyon National Park (Ariz.)