• Arch Culvert
• cast in site
• precast
• Shotcrete
• steel

• July 2010
• June 2010
• May 2010
• April 2010
• March 2010
• October 2009
• September 2009

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Clue: It was built in 1977
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TechSpan® – Precast Arches
TechSpan® is the most reliable, cost-effective precast concrete arch system available for the construction or replacement of culverts and bridges.
Advanced design procedures and unique fabrication capabilities provide the most efficient use of concrete and reinforcing steel. Unlike most alternative systems, efficiency and economy of design increase progressively as the embankment height over [...]