Tuesday, July 18, 2023

1923 UP/SP and 1915 Ocean-to-Ocean Bridges over Colorado River in Yuma, AZ

Bridges: (Bridge Hunter broke Mar 22, 2023; no Historic Bridges; Satellite)
SP Depot: (Satellite)

I included the semi-truck on the right to indicate that I-8 is now the main road bridge in this area.
Street View, Mar 2021

Frank Keller Photography posted
SP 7614 crosses from Arizona to California in the process crossing the Colorado River.
 
Gribblenation posted
Pictured is eastbound US Route 80 from the California side of the Colorado River looking towards the Ocean-to-Ocean Highway Bridge towards Yuma, Arizona.  This photo was featured in the November 1933 issue of Arizona Highways. 
The Ocean-to-Ocean Highway Bridge was constructed at the Colorado River during 1914 by Omaha Structural Steel Works.  The Ocean-to-Ocean Highway Bridge is reported to be the only known Pennsylvania truss span ever constructed in Arizona.  The name of the structure is taken from the Pikes Peak Ocean-to-Ocean Highway which was a major transcontinental Auto Trail.  The Ocean-to-Ocean Highway Bridge also carried the Southern National Highway, Bankhead Highway, Old Spanish Trail and Dixie Overland Highway during the Auto Trail era.
The Ocean-to-Ocean Highway Bridge became part of US Route 80 during November 1926 when AASHO commissioned the US Route System.  US Route 80 was realigned onto the 4th Street Bridge during 1956.  The Ocean-to-Ocean Highway Bridge would survive to modern times and is now signed as Historic US Route 80.  The Southern Pacific Bridge next to the Ocean-to-Ocean Highway Bridge was constructed during 1923.
Dan Rasp: You missed one point. It was the first highway bridge crossing the Colorado River. Love the post and photo. Thanks
Mike Gallagher: Another fun fact- US 80 used to run tandem with US 60 & US 70 in Tucson Arizona. 3 coast to coast highways.
Gribblenation: Mike Gallagher Phoenix-Tempe-Mesa-Apache Junction actually. US 80 and US 89 were concurrent through downtown Tucson.
Michael Adkins: Mike Gallagher Phoenix, not Tucson. US 60-70-80-89 all ran concurrently through Phoenix. In Tucson 80-89 ran concurrently. 60/70 stayed farther north.
 
Meg Blackmon commented on Gribblenation's post
Yup still used … view from Yuma prison

Bridges Now and Then posted
"US Hwy 80 and SPRR Bridges Across Colorado River - Yuma AZ -1942" (eBay)

An SP depot was just north of the bridge.
Street View, May 2023

Note that the tanks in the middle of the above view are on the right in the following photo.
LoC
Credit line: West Virginia Collection within the Carol M. Highsmith Archive, Library of Congress, Prints and Photographs Division.
Carol M. Highsmith's photographs are in the public domain.
[I am so thankful that Carol liked bridges and that she put them into the public domain.]
"The name of the bridge, built in 1915, is a reference to the days when two-lane automobile travel involved a patchwork of short roads and a handful of numbered long-distance roads. The transcontinental "Ocean-to-Ocean Highway" (later U.S. 80) was one of the latter. The Yuma bridge took the place of a ferry across the Colorado River. Its steel, Pennsylvania through truss design complimented by a Warren deck truss second span rests upon concrete piers and abutments above the river."

Street View, Mar 2021

`The sign lights up at night.
hmdb

azdot
The main span is 336' (102m) and the structure length is 440' (134m). The roadway width is just 18' (5.5m).
"According to ADOT's Historic Bridge Inventory, the Ocean-to-Ocean Bridge is 'the earliest and longest through truss in Arizona, the only Pennsylvania truss and one of the only three pin-connected trusses among Arizona's vehicular structures.'"

Both trusses are pinned.
Street View, Mar 2021

This is another example that shows that ABC (Accelerated Bridge Construction, building a truss offsite and then moving it into position) is not a new concept. A look at a satellite map does show that the Colorado River still has some water down here to support barges. But the river does practically disappear just a little further downstream.
hmdb

This bridge has two historical markers. 
hmdb_2
The original SP bridge was a swing bridge. Today's truss bridge was built in 1923.
[I'm not surprised that a 1915 truss is pin connected. I am surprised that a 1923 truss is pin connected.]



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