Haven Avenue Underpass

Aufbau provided construction inspection, and engineering and construction management support services to the City of Rancho Cucamonga for the development of the PS&E package and construction of this award winning project. Aufbau was engaged in every aspect of the project, from the preliminary conceptual design to final construction and project closeout. The project entailed lowering of the grades of Haven Avenue where it intersected the railroad tracks, construction of a temporary detour for Haven Avenue, installation of temporary shoo-flies to maintain the railway traffic during construction, construction of an elaborate shoring system, and construction of a railroad bridge for the Southern California Regional Rail Authority’s main and side tracks. The primary feature of the grade separation was a 4-span railroad bridge which spanned over the lowered Haven Avenue roadway section.  The superstructure consisted of pre-cast, pre-stressed arched concrete box girders simply-supported at the abutments and the center bent.

Location: Rancho Cucamonga, CA
Client: City of Rancho Cucamonga
Construction Cost: $13M
Services provided:

  • Construction inspection
  • Engineering and construction management support services
  • Design oversignt

I worked with staff from Aufbau on Haven Avenue grade-separation project in the City of Rancho Cucamonga. Aufbau coordinated the design and construction management of the project with the City, Metrolink, and other stakeholders and performed an exceptional job.


Naresh Patel, P.E. | Former Assistant Director of Standards & Design