Student Services and Administration

The Project.

This building was designed to be a front door entry to the campus. The visually striking open canopy conveys a friendly atmosphere and easy accessibility of faculty, staff, and support services.


Chaffey Community College


Rancho Cucamonga, CA


  • Geotechnical
  • Materials Testing

Project Fact:

Founded in 1883, Chaffey College is one of the first colleges to be established in California.

The Leighton Solution.

The college’s location on an alluvial fan presented the geotechnical challenge of particles that were oversized for use as fill. Leighton provided recommendations to crush these particles and re-use. During construction fill, material was passed through a 6-inch screen to segregate oversize material through a process observed and accepted by Leighton.

Because the site is close to the Rancho Cucamonga fault (Type A), seismic design parameters were provided to the project team for their analysis and design.

Additional earthwork operations included stripping of vegetation, removing surface asphalt pavement, overexcavation of potentially compressible surficial materials, and placement of controlled fill to achieve design grade. Special inspection and materials tests included concrete, masonry, reinforcing steel, and pull tests.