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If one finds an exceptional arch and wishes to pursue a possible official naming of the arch and placement on a Topo Map contact,


U.S. Board on Geographic Names

U.S. Geological Survey

523 National Center

Reston, VA 20192-0523

(703) 648-4552


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This Website is following the system found in the book Arches

of the Escalante Canyons and Kaiparowits Plateau for arch determination and measurement. By doing this it allows for a uniform application of the same rules to all Arches in the GSENM.


This is a very brief and abbreviated overview on what constitutes an arch.

“An arch is simply a natural rock opening lighted from both sides with a secondary light opening at least three feet (3’0) in at least one dimension. No part of an arch has moved relative to any other part. An arch is not a cave, which has an area of total darkness, nor is it a hole through a boulder pile, where the opening is bridged by rocks that have moved.”

“Opinions differ on how to measure arches. the dimensions used at this web site are the greatest width and height of the opening below or behind the span of rock.”

To see current arch Statistics and data please click here.

PHOTO AT RIGHT  WITH UPWARD LOOKING VIEW SHOWING MINIMUM 3’0 OPENING DIMENSION FROM BEHIND THE ABOVE ARCH.  WIDTH CAN BE ANY DIMENSION WITH LENGTH BEING 3'0+

HEIGHT MEASUREMENT TAKEN FROM THE FRONT OF THE FACE BOTTOM SIDE TO WHERE THE VERTICAL LINE INTERSECTS THE FIRST HORIZONTAL PLANE

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