Holly Street Bridge Seismic Retrofit Project

Holly Street Bridge over Arroyo Seco Flood Control Channel (southeast of Linda Vista Avenue)


The City of Pasadena, in coordination with the California Department of Transportation (Caltrans), proposes to rehabilitate and seismically retrofit the existing two-lane Holly Street Bridge (No. 53C1041) over the Arroyo Seco channel, the Arroyo Seco Trail (a Class 1 multi-use trail), and North Arroyo Boulevard.  The seismic retrofit of Holly Street Bridge would occur on the Holly Street Bridge over the Arroyo Seco Flood Control Channel southeast of Linda Vista Avenue in the City of Pasadena, Los Angeles County, California.  Staging areas would occur along North Arroyo Boulevard between the Holly Street Bridge and Seco Street, as well as other staging areas at the intersection of Seco Street and West Drive. Access to the bridge would also occur along North Arroyo Boulevard and Linda Vista Avenue.

The existing bridge was constructed in 1925 and is 45.3-feet wide by 400.0-feet long. It carries two-lanes of traffic over the Arroyo Seco and North Arroyo Boulevard (one lane in each direction), as well as two sidewalks along its north and south sides with no barrier between the sidewalk and vehicular traffic. The bridge is a concrete arch-deck span constructed from cast-in-place concrete. The current Annual Average Daily Traffic is 7,453. According to the Caltrans Bridge Inspection Report, the bridge currently (July 2016) holds a sufficiency rating of 39.4 and is classified as Structurally Deficient.

The proposed Project would provide needed rehabilitation and a seismic retrofit to the existing bridge. Bridge retrofit and rehabilitation would include a deck and barrier replacement, luminaire replacement, archway stiffening, joint strengthening, column strengthening, pier cap strengthening, retrofit foundation hold-downs, concrete spall repair, crack sealing, and a bonded grout treatment.

A raised construction work platform would be temporarily constructed over the Arroyo Seco concrete channel, North Arroyo Boulevard, and the Class 1 multi-use trail so that these facilities may remain untouched and functioning for the duration of construction. The platform would provide construction access to the underside of the bridge to allow the retrofit and rehabilitation actions to occur. A temporary bridge would be constructed over the Arroyo Seco Flood Control Channel to provide construction equipment access to both sides of the channel.  This bridge would be a separate structure from the raised construction work platform under the Holly Street Bridge. The Holly Street Bridge would be closed approximately 9 months out of the 18 month construction period. The proposed Project would involve the use of a detour and temporary access route using Linda Vista Avenue, San Rafael Avenue, Colorado Boulevard, and Orange Grove Boulevard.

All work is expected to occur within the existing right-of-way, with the exception of partial ROW acquisitions for new sidewalks and temporary construction easements required. Temporary construction easements and utility relocations would occur as a result of the proposed Project since an access road on the west side and east side of North Arroyo Boulevard would need to be constructed in order to allow contractors to access the bridge.

The bridge is on the eligible bridge list for rehabilitation through the Highway Bridge Program under lump sum funds for the Federal Transportation Improvement Program. The proposed Project is federally funded and requires compliance with both the National Environmental Policy Act (NEPA) and the California Environmental Quality Act (CEQA). The lead agency for the CEQA compliance is the City of Pasadena; the federal lead agency for NEPA compliance is Caltrans.

Holly Street - Project Location Map


The City of Pasadena has prepared an Initial Study (IS) and proposed Mitigated Negative Declaration (MND) for the Project.  The IS/MND and corresponding Notice of Intent to Adopt an MND can be downloaded from the following links:



During the public review period, the City will be hosting a Public Workshop to provide additional information and answer any questions on the project in general, or regarding the findings and conclusion provided in the Initial Study/Mitigated Negative Declaration.  The Public Workshop will be held on July 31, 2019 from 5:30pm to 7pm at La Casita Del Arroyo – 177 South Arroyo Boulevard, Pasadena, CA 91103).

The Pasadena City Council will consider the proposed project and any public comments received during the public review period, and will make a decision if the City should adopt the Mitigated Negative Declaration and advance to the Final Design phase.  This decision is expected to occur at a regularly scheduled City Council Public Hearing in the Fall of 2019.  City Council Hearings are held in the Pasadena City Hall Council Chamber – S249 (100 North Garfield Avenue, Pasadena, CA 91101).

CASE MANAGER: James Tong, Engineer
EMAIL: JTong@cityofpasadena.net