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MARKER DATABASE
“Bite-Size Bits of Local, National, and Global History”
“Bite-Size Bits of Local, National, and Global History”
Holbrook in Navajo County, Arizona — The American Mountains (Southwest)
 

Agate Bridge

 
 
Agate Bridge Marker image. Click for full size.
By Denise Boose, September 2, 2013
1. Agate Bridge Marker
Inscription. Centuries of scouring floodwaters washed out the arroyo, or gully, beneath this 110-foot (34 meter) petrified log to form Agate Bridge. The stone log, harder than the sandstone around it, resisted erosion and remained suspended as the softer rock beneath it washed away.

Enthusiastic visitors fascinated by Agate Bridge worked to preserve it through the establishment of Petrified Forest National Monument in 1906. Conservationists felt this ages old natural bridge needed architectural support and in 1911 erected masonry pillars beneath the log. In 1917 the present concrete span replaced the masonry work.

Current National Park Service philosophy allows the natural forces the create unusual feature to be left in its natural state. Eventually the natural forces that created Agate Bridge will cause it to fall with or without its supports. For your safety, and to help preserve the petrified log, please stay off the bridge.

Caption: Masonry pillars were added to “support” Agate Bridge in 1911.

Caption: Agate Bridge as it looked about 1900.
 
Erected by Petrified National Forest Services.
 
Location. 34° 53.559′ N, 109° 47.639′ W. Marker is in Holbrook, Arizona, in Navajo
Agate Bridge Marker image. Click for full size.
By Denise Boose, September 2, 2013
2. Agate Bridge Marker
County. Marker is on Petrified Forest Road, on the right when traveling north. Touch for map. Marker is at or near this postal address: Petrified Forest Road, Holbrook AZ 86025, United States of America.
 
Other nearby markers. At least 8 other markers are within 6 miles of this marker, measured as the crow flies. Jasper Forest (approx. 0.8 miles away); From Wood to Stone (approx. 2 miles away); Triassic Landscape (approx. 2 miles away); Pioneers of Paleontology (approx. 3.7 miles away); Newspaper Rock Petroglyphs Archeological District (approx. 4.8 miles away); Newspaper Rock (approx. 4.8 miles away); Summer Solstice Marker (approx. 5.7 miles away); Whispers from the Past (approx. 5.7 miles away). Touch for a list and map of all markers in Holbrook.
 
Also see . . .  Agate Bridge - Petrified Forest. 360 Cities and Toni Garbasso present a 360 degree view of the Agate Bridge and marker site. (Submitted on September 30, 2013.) 
 
Categories. Paleontology
 
Agate Bridge Marker image. Click for full size.
By Denise Boose, September 2, 2013
3. Agate Bridge Marker
Agate Bridge as it looked about 1900 image. Click for full size.
By Denise Boose, September 2, 2013
4. Agate Bridge as it looked about 1900
Masonry pillars were added to “support” Agate Bridge in 1911 image. Click for full size.
By Denise Boose, September 2, 2013
5. Masonry pillars were added to “support” Agate Bridge in 1911
Agate Bridge image. Click for full size.
By Denise Boose, September 2, 2013
6. Agate Bridge
Agate Bridge image. Click for full size.
By Denise Boose, September 2, 2013
7. Agate Bridge
Agate Bridge image. Click for full size.
By Haines Photo Company, circa 1908
8. Agate Bridge
Photo courtesy of the Library of Congress. Note the copyright date indicated for the photo is February 5, 1908, which is odd in that masonry supports are plainly visible, some three years before their installation date as provided on the marker.
 
 
Credits. This page was last revised on June 16, 2016. This page originally submitted on September 28, 2013, by Denise Boose of Tehachapi, California. This page has been viewed 368 times since then and 24 times this year. Photos:   1, 2, 3, 4, 5, 6, 7. submitted on September 28, 2013, by Denise Boose of Tehachapi, California.   8. submitted on September 30, 2013. • Andrew Ruppenstein was the editor who published this page.
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