During its construction (1991-2004) the Central Arterty / Tunnel Project was the largest and most complex infrastructure project in the history of the United States, costing nearly $15 billion. Waterfield Design worked on 4 separate sections of this massive project, with a construction value that approached $2 billion.

Our work involved design for the reconstruction of the new surface roads & public open space that was created by the relocation of the existing 6 lane 1940ís era viaduct into an 8-12 lane underground tunnel.

Waterfield created interim surface restoration design and grading for all Interchange landscape areas and perimeter development parcels. Our services also included final surface design at the city street interface with the tunnelís interchange ramps and connectors. Design elements included:

  • Pedestrian and bikeway circulation
  • ADA accessibility
  • Sidewalks
  • Parking
  • Public plazas and sitting areas
  • Urban landform designs
  • Surface street connections to the Harborwalk
  • Open space landscape design
  • Planting, street tree selection, and irrigation design
  • Tunnel seatwalls
Extensive construction management assistance was provided over a 4 year period.

Waterfieldís work covered the following construction contracts:
C09C1; C09C2; C09C4