Kleinfelder provided geotechnical engineering services during the preliminary design, final design, and construction phases of the Orangethorpe Avenue Grade Separation project. The project—which increases both driver and pedestrian safety as well as eliminates traffic delays—was one of the most complex in the OC Bridges program. a complex merge area The Orangethorpe project had complex geometry due to the convergence of Orangethorpe Avenue, Crowther Avenue, Miller Street, the BNSF railroad tracks, Atwood Channel, and Carbon Canyon Channel at the project site. Kleinfelder’s professionals contributed to the innovative and cost-effective solutions that included three new bridges and 13 new retaining walls as tall as 38 feet to develop the most efficient design for the complicated mer

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