Rainbow Bridge National Monument

Rainbow Bridge National Monument is administered by Glen Canyon National Recreation Area, southern Utah, USA. Rainbow Bridge is often described as the world's largest natural bridge. The span of Rainbow Bridge is 275 feet (84 m), and at the top it is 42 feet (13 m) thick and 33 feet (10 m) wide. Two other natural arches, Kolob Arch and Landscape Arch, both also in southern Utah, have confirmed spans several meters longer than Rainbow Bridge, but by most definitions of the terms are described as arches but not bridges. With a height of 290 feet (88 m) Rainbow Bridge does indeed stand taller than either of its longer competitors, but it is outdone by Aloba Arch at 394 feet (120 m), which is in turn dwarfed by the world's tallest arch, Tushuk Tash in China at an estimated 1,200 feet (366 m). It is probably the most accessible of the large arches of the world, as it can be reached by a two-hour yacht ride on Lake Powell or by hiking several hours overland from a trailhead (obtain a permit from the Navajo Nation in Window Rock, Arizona).

Geology

side.]] Rainbow Bridge is made from sandstone formed during the end of the Triassic and the Jurassic periods. Extreme fluctuations in climate during the Triassic and Jurassic periods—the region was alternately a sea and desert on par with the Sahara—produced layers of sandstone with different levels of hardness. By the end of the Jurassic, the sea returned to cover these layers of sandstone and compressed them so tightly that they would persist until the present day.

As Bridge Creek flowed toward the growing Colorado River during the last ice age, it carved first through softer rocks and veered away from the harder Triassic and Jurassic sandstones, eventually creating a wide hairpin bend that flowed around a solid "fin" of sandstone that would become Rainbow Bridge. The previous course of the creek is still visible above the bridge. Water flows back on itself at bends and wide spots, creating swirling eddies along the banks. As the creek flowed around Rainbow Bridge fin, these abrasive eddies formed on both the upstream and downstream sides and cut circular alcoves in the rock wall. The sediment in the creek eventually scoured the softer layers of sandstone away, leaving the harder layers behind.

History

side.]] Located in the rugged, isolated canyons at the foot of Navajo Mountain, Rainbow Bridge was known for centuries by the Native Americans who have long held the bridge sacred. Ancient Pueblo Peoples were followed much later by Paiute and Navajo groups who named the bridge Nonnezoshe or "rainbow turned to stone." Several Native American families still reside nearby.

By the 1800s, Rainbow Bridge was probably seen by wandering trappers, prospectors, and cowboys. Not until 1909, though, was its existence publicized to the outside world. Two separate exploration parties - one headed by University of Utah dean Byron Cummings, and another by government surveyor, W.B. Douglass - began searching for the legendary span. Eventually, they combined efforts. Paiute guides Nasja Begay and Jim Mike led the way, along with trader and explorer John Wetherill. Late in the afternoon of August 14, coming down what is now Bridge Canyon, the party saw Rainbow Bridge for the first time.

The next year, on May 30, 1910, President William Howard Taft proclaimed Rainbow Bridge National Monument. Teddy Roosevelt and Zane Grey were among the first visitors to make the trek by foot and horseback from Oljeto or Navajo Mountain. Rainbow Bridge became more accessible with the popularity of river running in Glen Canyon after World War II, although the trip still required several days floating the Colorado River plus a seven-mile hike up-canyon. By the early 1950s, people could travel upstream by jet boat from Lee's Ferry. Glen Canyon Dam was authorized in 1956. By 1963, the gates on the dam closed and rising Lake Powell began to engulf the river and its side canyons. Higher water made motorboat access to Rainbow Bridge much easier, bringing thousands of visitors each year.

In 1974, Navajo tribal members who lived in the vicinity of Rainbow Bridge filed suit in U.S. District Court against the Secretary of the Interior, the Commissioner of the Bureau of Reclamation, and the Director of the National Park Service. The suit was an attempt to preserve important Navajo religious sites that were being inundated by the rising waters of Lake Powell. The court ruled against the Navajo, saying that the need for water storage outweighed their concerns. In 1980, the Tenth District Court of Appeals ruled that to close Rainbow Bridge, a public site, for Navajo religious ceremonies would violate the U.S. Constitution which protects the religious freedom of all citizens.

By 1993, a National Park Service General Management Plan, involving much public input, was adopted. As part of the planning process, the National Park Service consulted with the five Native American nations affiliated with Rainbow Bridge: the Navajo, Hopi, San Juan Southern Paiute, Kaibab Paiute, and White Mesa Ute. Chief among their concerns was that Rainbow Bridge - a religious and sacred place - be protected and visited in a respectful manner. Additionally, the tribes expressed concerns about visitors approaching or walking under the bridge. Today, the National Park Service informs visitors to be respectful of its significance to the people who have long held Rainbow Bridge sacred.

Panorama

From Lake Powell's side

See also

  • Glen Canyon National Recreation Area

External links

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Marcela Ornelas
13 May 2013
Magic place !
Hervé Piedvache
19 July 2015
Le nature fait des choses véritablement incroyables. Pensez à prendre de l'eau car peu d'ombre aux alentours !
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