Twin View Bridge Replacement over Churn Creek

The existing two-lane bridge at this location was built in 1918. It had narrow lanes and no shoulders, and no longer met current design standards for safety and operations. The new two-lane bridge more than doubled the width of the current bridge at a finished 67 feet. It provides motorists with two 12-foot-wide lanes in each direction, 8-foot-wide shoulders, and a 14-foot-wide center median. For pedestrians and bicyclists, the bridge has two 5-foot-wide raised sidewalks in each direction.

The new super structure is three spans of cast-in-place, post-tensioned box girders and concrete deck. The pier foundation system includes four 48-inch-diameter cast-in-drilled-hole concrete piles with isolation casings located at the first easternmost piling. The abutments are founded on six 36-inch diameter cast-in-drilled-hole concrete piles with isolation steel casings located at the first and second easternmost piling. The pier piling is anchored into an 18-foot-deep rock socket, and the abutment piling is anchored by a 10-foot rock socket. The new bridge structure deck elevation is approximately 635-feet, which is 8-feet above the 100 year flood elevation.

CALTROP provided full construction management services including plan review, environmental documentation, inspection during construction, office engineering, utility coordination, community outreach and project closeout.

CLIENT: City of Redding
CONTRACT VALUE: $3.6 million


  • Bridge Replacement
  • Utility Replacement
  • Stream Diversion
  • Falsework Over Water
  • CIP, PS Concrete Structure


  • Construction Management
  • Inspection
  • Office Engineering
  • Utility Coordination
  • Falsework and Shoring Reviews
  • Community Outreach