April 20, 2011
Cypress Avenue Bridge Project Over the Sacramento River Completed and Open to Traffic
T.Y. Lin International (TYLI), a globally recognized full-service infrastructure consulting firm, announces that construction of the new Cypress Avenue Bridge, which is the main artery over the Sacramento River connecting east and west Redding, has been completed and is officially open. The $62 million project, of which close to 90% was paid with Federal funds, began four years ago and consisted of widening Cypress Avenue from four to six lanes and replacing two steel girder separate spans with a single 1,025-foot-long, five-span, haunched, cast-in-place prestressed concrete box-girder bridge. The signature bridge also provides safe pedestrian and bicycle lanes with scenic views, in addition to meeting current seismic requirements. The new iconic structure serves as a gateway to the City of Redding as it spans the Sacramento River and heads west towards City Hall.
TYLI led the multi-disciplinary project, which utilized a four-phase process for developing the bridge’s unique architectural character. To identify the community’s preference on the global character of the bridge and to present locations and treatments, the public was encouraged to attend City Council meetings and comment on the design. Special design features for Redding residents include the following:
- The bridge needed to easily accommodate increased bicycle and pedestrian use, and to that end TYLI included wide sidewalks and a bike path on both sides of the bridge.
- The bridge crosses over the Sacramento River, where the City has been revitalizing the riverfront with a path and park system. To support City efforts, a large staircase was added in order to invite people to make use of the bridge and trail.
- In order to demarcate the river location for travelers along Cypress Avenue, eight custom-designed lanterns with dichroic glass panels were placed at four of the piers. Illuminated by bright, long-lasting cold cathode fixtures, the decorative lanterns also offer increased safety for pedestrians after dark.
- Even the look of the abutments and piers was taken into account. They are heavily-rusticated along their interior surface, with smooth, rounded surfaces on the exterior.
“We worked closely with the City of Redding and ad hoc committee members to identify and incorporate key aesthetic elements into the design,” said Chris Hodge, TYLI Project Manager. “Additional design features included a haunched soffit, pier and abutment overlooks, and spiral abutment staircases.”
TYLI assisted the City with the process of re-scoping the project from rehabilitation to full replacement under the federal-aid Highway Bridge Replacement and Rehabilitation (HBP) Program. The company not only delivered project plans, specifications and estimates for the bridge replacement, the plans also took into account approach roadway and intersection improvements at each end of the bridge. This included reconstruction and realignment of adjacent connector roads, the removal and replacement of existing pavement, curbs, gutters, and sidewalks, the construction and reconstruction of raised medians, roadway paving, the addition of new storm drain systems, and striping.
“The Cypress Avenue Bridge project involved a three-season staged construction approach that maintained four lanes of traffic on Cypress Avenue at all times, while respecting the sensitive fish spawning grounds under and adjacent to the bridge,” said Hodge. “The result is a beautiful, well-engineered signature bridge that was designed with input from the people of Redding and which came within the established budget.”