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  • Third Street Bridge in the open position. Photo by EvleenSF | Flickr

Third Street Bridge Rehabilitation Project

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The Third Street Bridge, also known as the "Lefty O'Doul Bridge", is scheduled for rehabilitation work to sustain the integrity of the bridge and to address corrosion issues. 

The project will involve; repairs or replacement of damaged steel members, welds, concrete counterweights, support piles, bridge fenders, spot removal of rust and associated priming and recoating, removal and replacement of the steel bridge deck and other associated work. This is a unique project that will involve the use of underwater divers, barges, rafts, temporary installation of protective barriers and containment curtains. 

The first phase of the project, repairs of the east and west counterweight, has been completed. Repairs were made between December 11, 2017 and January 22, 2018. The next phase of the rehabilitation project is anticipated to begin in late spring 2018 and will last approximately 18 months. During this phase, the bridge will be locked in the down position. During this period, access over the bridge will be available to pedestrians, bicyclists and vehicles, with some minor traffic restrictions to be expected during different phases of rehabilitation work. Access for maritime vessels will be restricted as the bridge will be locked in the down position, i.e. boaters will not be able to request the bridge to be raised during this phase of rehabilitation work. Boaters are advised to move/relocate their vessels in or out of Mission Creek before March 2018 should they anticipate needing to use their vessles during this phase. 

Project Timeline*:
- 2017: Inspection and environmental clearance 
- Fall 2017: Completion of design
- December 11, 2017 - January 22, 2018: Counterweight repair work
- Spring 2018 - Spring 2019: Next phase of rehabilitation and construction activity

Construction activity on the main rehabilitation phase is anticipated to begin in late Spring 2018 and is anticipated to last for approximately 18 months.  At some points during the rehabilitation and construction phases, access to the bridge may be limited or closed to pedestrian, bicycle and vehicle traffic. We will be working closely with surrounding residents and businesses in the area to coordinate and minimize impacts during these anticipated closures. The bridge will remain open to pedestrians during San Francisco Giants home games. 

Nighttime and weekend construction activity may be required. Full traffic plan with detours and alternative routes will be made available as the project nears. 

*Please note that the construction schedule is subject to change due to rain, equipment breakdown, and/or unforeseen field conditions. Please see posted "No Parking" barricade signs for exact parking restrictions during construction. 

Project Activity:
01/22/2018: Construction crews have completed phase one of rehabilitation work on the Third Street Bridge. The bridge is anticipated to re-open to all vehicle, bicycle and pedestrian traffic by 5:00 PM, Monday 01/22/18. We are pleased to report that crews were able to complete counterweight repairs several days ahead of schedule. We thank you for your patience and cooperation during this first phase of repair work.

Bicycle detour route: SFMTA will begin removal of the temporary bicycle detour route on Berry Street between 3rd and 4th streets starting on Tuesday, 01/23/18. Parking along the north side of Berry Street will be restored and normal metered parking will resume.
What's next: The next phase of work on the Third Street Bridge Rehabilitation Project is anticipated to begin in late spring 2018. Actual construction start dates will be noted in future updates as a contractor schedule is still being developed. Once construction work starts, the bridge will be locked in the down position. Maritime vessels will not be able to request for the bridge to be raised for the duration of rehabilitation work. Access across the bridge for vehicles, bicycles and pedestrians will be maintained with at least one lane open in each direction. Lanes may be shifted as needed to accommodate rehabilitation work on different sections of the bridge. Intermittent full closure of the bridge, where access will be restricted to all vehicle, bicycle and pedestrian traffic for a short period of time, may be required during certain phases of work. Advance notice will be given if and when full closure of the bridge is needed.

01/08/2018Construction crews have nearly completed all repairs on the east counterweight, with final punch list items to be completed this week, weather permitting. Work is continuing on the west counterweight with crews reinforcing dowels and performing concrete repairs over the next few weeks. Crews are currently on schedule to complete counterweight repairs by 01/26/18*. 

Crews will be working on Monday 01/15/17. The MLK march on 01/15/17, from the 4th and King Caltrain Station to Yerba Buena Gardens, will be rerouted due to the ongoing closure of the Third Street Bridge. The march route will now travel from the Caltrain station down 4th Street, to Berry Street to 3rd Street and up to Howard Street to Yerba Buena Gardens. SFMTA continues to actively monitor traffic conditions and assign resources as needed to help ease congestion. We thank you for your continued patience during these critical counterweight repairs and understand your frustrations with the increased amount of traffic in the area.

12/19/2017: Roadway closures began at 9 AM on Monday, 12/11/17 as originally scheduled and the bridge was raised at approximately 11 AM and locked in the full upright position. Crews have erected scaffolding around the east and west counterweights, and once in place, crews will wrap the scaffolding with protective shrink wrap. Crews will then begin demolition of the concrete on the counterweights. Demolition activity is anticipated to continue through 12/29/17. General construction related noise is to be expected during this period.

Once demolition work is complete, crews will begin concrete repair work, anticipated to occur between 01/02/18 through 01/20/18. Upon completion of repair work, crews will begin removal of scaffolding from the work area and will start to demobilize from the area. Counterweight repair activity is anticipated to be complete on the Third Street Bridge by 01/26/2018*. 
Traffic update: Since the bridge closure went into effect on Monday 12/11/17, extensive traffic control has been in effect, including installation of detour signage and deployment of numerous parking control officers at key intersections. SFMTA has been actively monitoring, and will continue to monitor, traffic issues and conditions and will reassign resources as needed to help ease congestion. Since Monday, additional parking control officers have been deployed around the work site and along detour routes to increase coverage and help with the flow of traffic in response to your feedback. We thank you for your patience during these critical counterweight repairs and understand your frustrations with the increased amount of traffic as drivers adjust to detours.
Bicyclists are advised and asked to use caution and to watch out for pedestrians when traveling through the area. A reminder that riding on sidewalks or on the promenade between 3rd and 4th streets is prohibited (SF Transportation Code Sec. 7.2.12). It is recommended for bicyclists to take the suggested Berry Street bicycle detour route when needing to cross Mission Creek. The temporary bike line along the north side of Berry Street will remain in place for the duration of the counterweight repairs. Parking will be restored and the temporary bike lane will be removed upon completion of the project.

12/04/2017: BRIDGE CLOSURE NOTICECrews will raise and lock the bridge in the full upright position to perform counterweight repair work on the Third Street Bridge starting on Monday, December 11, 2017. Access to cross the bridge will be closed to all pedestrian, bicycle and vehicle traffic during this period. Maritime traffic through the channel will not be impacted during counterweight repair work. Work is anticipated to continue through Friday, January 26, 2018. Parking control officers will be onsite to monitor traffic conditions and help direct traffic in the area surrounding the Third Street Bridge. SFMTA will restrict parking along the north side of Berry Street during this period and will install a temporary bicycle lane along the north side of Berry Street to accommodate rerouted traffic. Parking restrictions will be in effect 24-hours a day, Monday-Sunday and drivers are advised to not park or pull into the restricted area/bicycle lane. Normal parking continue to be available along the south side of Berry Street. Along the north side, drivers may pull into the designated white curb loading zone for active loading and unloading. Following completion of counterweight repair work, parking will be restored on the north side of Berry Street. Trash receptacles may be put into the designated crosshatch area on Berry Street (but not place into the bike lane) for collection as normal.

10/30/2017: The Third Street Bridge is anticipated to be closed and locked in the upright position between December 11, 2017 and January 26, 2018 to facilitate counterweight repair work.  Additional restoration work anticipated to begin starting in early spring 2018. Work is being done during this off-season period to accomidate the San Francisco Giants and to minimize impacts to the general public. More details will be announced soon.

Suggested detour routes during bridge closure:
(Click on the links below for detour route maps!)
Pedestrians traveling southbound: Bay Trail Path > 4th St > Channel St
Pedestrians traveling northbound: Channel St > 4th St > Bay Trail Path 
Bicyclists traveling southbound: Berry St > 4th St > Channel St
Bicyclists traveling northbound: Channel St > 4th St > Berry St
Vehicles traveling southbound: King St > I-280 South > 18th St
Vehicles traveling northbound: 16th St > 7th St > Brannan St

The bridge was temporarily closed on February 12, 2017 for bridge counterweight inspection work performed by TRC Solutions. During the inspection, the bridge was opened to the full open position and was closed to vehicle, bicycle and pedestrian traffic from 6:00 AM to 4:00 PM. Water access was open and accessible at all times to watercraft traffic.  

More information about the project will be updated on this page as project details are finalized and made available to the public. 

Sign up for project updates about the Third Street Bridge Rehabilitation Project!

Streets & Streetscapes
Special Projects
Start Date February 2017
Completion Date May 2019
$25 Million
Project Manager
Thomas Roitman
Project Team

San Francisco Public Works
San Francisco Municipal Transportation Agency
Port of San Francisco

Coma Te
The iconic drawbridge, spanning Mision Creek Channel and McCovey Cove, first opened on May 12, 1933 and was designed by Joseph Strauss.