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Tucson in Pima County, Arizona — The American Mountains (Southwest)
 

Historic Fourth Avenue Underpass

Constructed 1916 – Demolished in 2008

 
 
Historic Fourth Avenue Underpass Marker image. Click for full size.
By Bill Kirchner, June 2, 2010
1. Historic Fourth Avenue Underpass Marker
Inscription.
Tucson City Engineer ― J. Mos Ruthrauff
Design Engineer ― L. R. Walker
Contractor ― Bent Brothers

In 1913, in an effort to separate pedestrians, vehicles, bicycles and wagons from trains, the City of Tucson embarked on a major grade separation project to have Fourth Avenue, a major thoroughfare in Downtown Tucson, travel beneath the Southern Pacific Railroad.

The original underpass consisted of two 12-foot-wide lanes and 6-foot-wide raised pedestrian walkways on each side. The underpass was approximately 257 feet long so that it could carry up to eleven railroad tracks. The structural system was cast-in-place reinforced concrete skewed slab spans supported on concrete walls and columns. The underpass featured a classical revival architectural treatment with recessed rectangular panels cast into the walls. A series of 3-foot-high concrete posts, connected with heavy chains served as railings to separate the sidewalks from travel lanes.

Before being demolished in 2007, the original underpass was recognized as Arizona's oldest urban grade separated roadway and it was listed on the National Register of Historic Structures.
 
Location. 32° 13.429′ N, 110° 57.945′ W. Marker is in Tucson, Arizona
Historic Fourth Avenue Underpass Marker image. Click for full size.
By Bill Kirchner, June 2, 2010
2. Historic Fourth Avenue Underpass Marker
Marker is mounted on an original concrete support.
, in Pima County. Marker is at the intersection of North Fourth Avenue and East 9th Street, on the right when traveling south on North Fourth Avenue. Click for map. Marker is in this post office area: Tucson AZ 85705, United States of America.
 
Other nearby markers. At least 8 other markers are within walking distance of this marker. Fourth Avenue Underpass (here, next to this marker); Coronado Hotel (within shouting distance of this marker); Wyatt Earp Shot Frank Stilwell... (about 500 feet away, measured in a direct line); Southern Pacific Railroad (about 500 feet away); Toole Avenue (about 500 feet away); Locomotive 1673 (about 500 feet away); Hotel Congress (about 700 feet away); Congress Street (about 800 feet away). Click for a list of all markers in Tucson.
 
Categories. Bridges & ViaductsNotable Places
 
Historic Fourth Avenue Underpass, circa 1917 image. Click for full size.
Arizona Historical Society Library & Archives/Tucson
3. Historic Fourth Avenue Underpass, circa 1917
Historic Fourth Avenue Underpass, circa 1920s image. Click for full size.
Arizona Historical Society Library & Archives/Tucson
4. Historic Fourth Avenue Underpass, circa 1920s
Historic Fourth Avenue Underpass, circa 1930s image. Click for full size.
Arizona Historical Society Library & Archives/Tucson
5. Historic Fourth Avenue Underpass, circa 1930s
 
 
Credits. This page originally submitted on , by Bill Kirchner of Tucson, Arizona. This page has been viewed 1,197 times since then and 24 times this year. Photos:   1, 2. submitted on , by Bill Kirchner of Tucson, Arizona.   3, 4, 5. submitted on , by Bill Kirchner of Tucson, Arizona. • Syd Whittle was the editor who published this page. This page was last revised on June 16, 2016.
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