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Historically a ford used by Native Americans, explorers and settlers, Lee's Ferry serves as the dividing point between the Upper and Lower Colorado River Basins, which were each allocated one-half of the Colorado River flow in the Colorado River Compact of 1922. Navajo Bridges over Marble Canyon, just downstream of Lee's Ferry
Map showing the Upper and Lower Colorado River Basin, and adjacent areas supplied by Colorado River water. The Colorado River Basin consists of 246,000 square miles (640,000 km 2), making it the seventh largest drainage basin in North America. [1] About 238,600 square miles (618,000 km 2), or 97 percent of the basin, is in the United States. [40]
The upper Colorado River was controlled by Comanches from the early 18th century to the late 19th century. In 1757, Spanish Texas attempted to establish an outlying Catholic mission (Mission Santa Cruz de San Sabá) on the San Saba River, near its confluence with the Colorado River. Nearly defenseless and viewed by the Comanche tribe as a ...
California's Sierra Nevada snowpack is now about 200% of average at this point in the season, while the snowpack in the Upper Colorado River Basin so far stands at about 140% of the median over ...
Officials, farmers and tribes are bracing for more difficult negotiations on how to divvy up the Colorado River in the long term.
Map of the Colorado River drainage basin The principal tributaries of the Colorado River of North America are the Gila River , the San Juan River , the Green River , and the Gunnison River . Tributary tree
The Colorado River is approaching a breaking point, its over-tapped reservoirs dropping. Years of drying have taken a toll at the river's source in the Rockies. The Colorado River is overused and ...
West of the Continental Divide, surface waters flow via the Green River, the upper Colorado River [a] (formerly the Grand River), or the San Juan River into the Colorado River and on to the Gulf of California.