The North Torrey Pines Road Bridge in Del Mar, California, is a majestic example of Depression-era bridge architecture, spanning over 550 feet and providing a beautiful addition to the scenic view of the ocean, Torrey Pines State Beach, and the Del Mar bluffs. Constructed in 1933, the structure has deteriorated and is in dire need of repair, with the lowest Sufficiency Rating of any bridge in San Diego County. The City of Del Mar and its design team have developed an outstanding retrofit strategy to preserve the aesthetic features of the structure and create a safer environment for the public.
- Historical structure
- Complex staging
- Unique retrofit design and implementation
- Railroad coordination
The construction cost of the retrofit of the structure is estimated to be approximately $14 million. It will include complete removal and replacement of the superstructure with precast girders to architecturally match the existing structure, as well as removal and replacement of the much of the substructure cover concrete and confinement reinforcing. New abutments will be placed on deep large diameter cast-in-drilled-hole concrete piles. The bridge will be cathodically protected from future corrosion.
The work will be done in stages so that there are no interruptions to the traveling public or the railroad. Traffic will be moved partially onto a contractor designed temporary structure built on the side of the existing structure, relocated for each stage.
Some of the challenges for this important project include site access, temporary structure carrying public traffic, bat exclusion, and railroad coordination.
TYLI is performing all construction management services for the City of Del Mar on this project. Services include providing a full time Resident Engineer, Structures Representative, Bridge, Roadway and Underground Inspectors and an Office Engineer for the project. TYLI is also managing multiple specialty subconsultants who will be performing Material Testing, Environmental and Cultural Monitoring, Noise Monitoring and Mitigation, Surveying, Specialty Deep Foundation Testing, Railroad Coordination, Cathodic Protection Inspection, and SWPPP Monitoring and Management. TYLI has also performed a detailed constructability review and has worked with the designer prior to bid to fine tune the bid documents to help eliminate some of the potential change orders or potential claims that could arise during construction.
- Honor Award, 2015
American Council of Engineering Companies of California (ACEC-CA)
- Project of the Year, 2014
American Public Works Association (APWA), San Diego and Imperial Counties Chapter
- Outstanding Bridge Project, 2014
American Society of Civil Engineers (ASCE), San Diego Section
- Project Achievement Award (Transportation/$5-$15 Million), 2014
Construction Management Association of America (CMAA), San Diego Chapter
- No. 4 in Top 10 Bridges List, 2014
Roads and Bridges