SR-91/La Sierra Interchange

SR-91/La Sierra Interchange

City of Riverside, SR-91/La Sierra Interchange Improvement Project

DCIM100GOPROThis project consists of replacing existing La Sierra Overcrossing over SR-91 freeway and La Sierra Overhead over BNSF railroad tracks with widening La Sierra Avenue between Diana Street and Indiana Street, ramp widening and realignment, constructing 12 MSE & CIP retaining walls along ramps and bridge abutments, sound walls, drainage, traffic signals and street lighting improvements, relocating waterlines, electrical and communications utilities through new bridges. Project required extensive coordination with Caltrans Structures Design Oversight, Construction Oversight and METS lab for QA/QC oversight.

Technical Features:

  • Roadway Improvement, AC/PCC Pavement.
  • Replacement of Existing La Sierra Interchange over SR-91 over active/congested Freeway – Bridge construction in two stages with closure pours.
  • Extensive Coordination with CT Oversight & BNSF Railroad
  • Extensive coordination with Caltrans and City projects for local and freeway closures. (Extended weekend closures, 10-day ramp closures for final tie-ins)
  • Precast pre-stressed Box Girder super structures with numerous utilities through the super structure.
  • Numerous Retaining Walls with unique architectural features, MSE Walls (proprietary systems), Sound Walls on 16″ CIDH piles.
  • Drainage Channel construction relocation/ realignment.
  • Conducting construction activities in a very tight construction space /off a temporary platform at top of County Flood Control Channel.
  • CIDH Piling, driven HP, spread footings.
  • Elaborate temporary shoring systems along existing bridges, live traffic and railroad tracks (soldier piles, shoring with tie-backs).
  • Numerous utility relocations .
  • Bridge Removal over Freeway & railroad tracks.
  • Landscaping, irrigation systems, and plant establishment.


Completed, No Claims, within Budget and On Time.

Construction Cost:


FALCON provided On-Call Inspecting Services assisting the City’s Resident Engineer/PM.
Client Reference: Philip Hanawi, P.E. – Principal Engineer – City of Riverside 3900 Main Street, Riverside, Ca 92522 (951) 826-5706