Pine Valley Creek Bridge

The Pine Valley Creek Bridge, officially named the Nello Irwin Greer Memorial Bridge, is a reinforced concrete box girder bridge in San Diego County, California near the town of Pine Valley. The bridge was built in 1974 as part of the Interstate 8 (I-8) freeway system. At the time of its construction, it was the first bridge constructed in the United States using the segmental balanced cantilever method. The northern span is 1,691 ft (515.4 m) long while the southern span is 1,741 ft (530.7 m) long.[1] The two spans rise 450 ft (137.2 m) above the valley floor,[1] placing Pine Valley Creek Bridge among the highest bridges in the United States.

Pine Valley Creek Bridge
Aerial view from a commercial jet
Coordinates 32°49′23″N 116°33′36″W
Carries I-8
LocaleSan Diego County, California
Official nameNello Irwin Greer Memorial Bridge
Named forNello Irwin Greer
Characteristics
MaterialReinforced concrete
Height450 ft
Longest span1,691 ft
No. of spans2
History
Opened1974

Originally known unofficially as the Pine Valley Creek Bridge, a California State Senate concurrent resolution (SCR-33) officially named the bridge in honor of the project engineer, Nello Irwin Greer, responsible for designing the section of I-8 known as the "Pine Valley Project".[2]

In the original design, the freeway's routing followed the old U.S. Route 80 (US 80) path through the center of the town of Pine Valley. This would have destroyed much of the town and many of the native pines found there. Greer's design re-routed the freeway to the south, bypassing and preserving the quaint beauty of this eastern San Diego County mountain community. This new design also saved 2 miles (3.2 km) of freeway construction, saving millions of dollars in costs. However this re-routing of the freeway mandated the crossing of the Pine Valley Creek Canyon. The bridge that now bears Greer's name was the design answer to that engineering hurdle.[3]

See also

References
  1. Janberg, Nicolas (February 5, 2016). "Pine Valley Creek Bridge". structurae.net. Archived from the original on December 20, 2016. Retrieved December 20, 2016.
  2. "Senate Concurrent Resolution No. 33" (PDF). info.sen.ca.gov. Senate of the State of California. March 19, 2007. Archived from the original (PDF) on June 16, 2009. Retrieved December 20, 2016.
  3. "Interstate 8 - San Diego County #1, Westbound: California 79 to Sunset Cliffs Boulevard". westcoastroads.com. AARoads. May 17, 2007. Archived from the original on May 9, 2008. Retrieved December 20, 2016.


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