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Ames Construction Midway On Bridge Replacement By Irwin Rapoport
CEG CORRESPONDENT
The Arizona Department of Transportation (ADOT) is investing $70 million to replace two aging bridges on U.S. 60 just east of the town of Superior in Pinal County. Construction began in early 2024, with Ames Construction expected to deliver the project in the summer of 2028. Ames has crews working on the two new structures between mileposts 227 and 229.5. A new Queen Creek Bridge is being constructed just east of the existing steel arch bridge — 763 ft. long, one lane in each direction plus shoulders — which will be demolished once the new one is built. The concrete Waterfall Canyon Bridge, supported by several concrete columns — 107 ft. long, one lane in each direction, east of the Queen Creek Tunnel — is being reconstructed into two box culverts to improve drainage, and will remain in its existing location. Guardrail replacement and other general maintenance work also is occurring within and near the Queen Creek Tunnel. “The Queen Creek Bridge, built in 1949, and the Waterfall Canyon Bridge, built in 1929, were built to standards in those times,” the ADOT project web page said. “However, those standards no longer meet the current minimum bridge guidelines of ADOT or the Federal Highway Administration and the American Association of State Highway Transportation Officials. ADOT has completed multiple maintenance projects on the bridges to extend their lives; however, due to weather and continued traffic-induced vibrations, the structures have reached the
The Arizona Department of Transportation (ADOT) is investing $70 million to replace two aging bridges on U.S. 60 just east of the town of Superior in Pinal County.
end of their useful lives.” “[The bridges] provide access from Globe and eastern Arizona to mines in Miami and Superior,” Garin Groff, an ADOT spokesman, told Construction Equipment Guide. “Regionally, it reduces the detour through Winkleman by approximately 75 miles.” The project’s scoping document was completed in 2017. An in-house ADOT team designed the project. In 2023, 8,242 cars and trucks crossed the
bridges daily. By 2043, ADOT estimates the daily traffic count will increase to 14,754. “The main challenges were the rock blasting and removal from U.S. 60 to maintain traffic,” said Groff, “as well as the access road to build the bridge, the removal of the existing bridge and geotechnical conditions.” The lifespan of the new bridge structures is 75 years. The traffic management plan is based on
occasional restrictions and closures of U.S. 60 in the work zone during certain types of work, such as rock blasting. Ames Construction has completed the corridor safety improvements. Over the next year, efforts will focus on completing the new bridge substructure and beginning — and hopefully completing — the new bridge superstructure. see BRIDGES page 6