Dufferin Street bridges

Dufferin Street Truss Bridge/Dufferin Street Overpass
Dufferin Street Truss Bridge/Dufferin Street Overpass
	The Dufferin Street bridges over the Gardiner Expressway and the rail line from the west.
Coordinates	43°38′03″N 79°25′31″W / 43.634087°N 79.425402°W
Carries	Pedestrians and Vehicular
Crosses	Metrolinx/GO Transit rail corridor
Locale	Toronto, Ontario, Canada
Maintained by	Toronto Transportation Services
Characteristics
Material	Steel and Concrete
Total length	30 metres (98 ft) (rail bridge) ; 35 metres (115 ft) (overpass)
No. of spans	2
Clearance above	6.37 metres (20.9 ft) (rail bridge)
History
Construction start	1911 ; 1958
Construction end	1912 (rail bridge) ; 1958 (overpass)
Opened	1912 ; 1959
Closed	2013
Location

The Dufferin Street bridges are two inter-connected vehicular bridges in Toronto, Ontario, Canada. The bridges carry Dufferin Street over a railway corridor and the Gardiner Expressway to Exhibition Place. The bridges closed to vehicular traffic in 2013. Temporary structures were built in 2013-2014 to allow a resumption of traffic in early 2014.^[1] As of July 2023 the spans over the Gardiner Expressway remain in place, as do the temporary bridges over the northern span.

North span

The truss bridge is a 30 metres (98 ft) steel truss bridge, built from 1911 to 1912 to cross over railway tracks south of Springhurst Avenue. Four tracks pass under the bridge. A 2013 engineering study determined that the bridge was unsafe and not viable to be repaired.^[2] However, in 2014, Bailey bridges were added for pedestrian traffic on the east and west sides, while the inner steel plate box girder bridge for vehicular traffic remains in place.

South span

The south span is a 35 metres (115 ft) concrete overpass built in 1958 after demolition of the old Dufferin Gate to allow for clearance for the Gardiner Expressway below.^[3]^[4]

Deterioration and replacement

After a report from external inspections conducted in 2007, the city decided to replace both spans with a single span.^[4] The report found that:

the 1911 steel plate girder bridge over rail corridor is structurally unsafe for vehicular traffic
the bridges lack space below to expand the rail corridor
the bridges need to provide space for future LRT corridor to the south end of the bridge
the 1958 concrete bridge over Gardiner Expressway needs maintenance to keep it structurally safe
the replacement should eliminate the existing 10 metres (33 ft) gap between the two existing bridges spans

From June 2013 the bridges have been closed to vehicular traffic. In November 2013-early 2014, the north bridge superstructure was replaced by three temporary bridges - two for traffic, and a third for pedestrians. The temporary bridges were opened in 2014 and are still used as of September 11, 2021. ^[5]

Toronto tried deciding the type of bridge that will span over the tracks, but the decision was canceled as of September 11, 2021. ^[6] The four types were:

Gallery

View of Dufferin Street bridge showing deterioration.
Looking north from Dufferin Gate with overpass in foreground and truss bridge in background

References

^ "Deteriorating Dufferin Street bridge to close for 18 months". Citynews.ca. 2013-06-03. Retrieved 2013-11-04.
^ "Dufferin Bridges: Appendix E: Structural Options Evaluation" (PDF). City of Toronto.^{[permanent dead link]}
^ "A brief history of the Dufferin Gate at the CNE grounds". Blogto.com. 2012-01-28. Retrieved 2013-11-04.
^ ^a ^b "Dufferin Bridges: Municipal Class Environmental Assessment" (PDF). City of Toronto.^{[permanent dead link]}
^ "Dufferin Street Bridge Demolition and Installation of Temporary Crossing" (PDF). gordperks.ca.^{[permanent dead link]}
^ LEA Consulting Ltd. (10 March 2011). "Structural Engineering Evaluation" (PDF). Dufferin Bridge EA Study. City of Toronto. Archived from the original (PDF) on 31 January 2016.

[1] "Deteriorating Dufferin Street bridge to close for 18 months". Citynews.ca. 2013-06-03. Retrieved 2013-11-04.

[toronto1-2] "Dufferin Bridges: Appendix E: Structural Options Evaluation" (PDF). City of Toronto.^{[permanent dead link]}

[3] "A brief history of the Dufferin Gate at the CNE grounds". Blogto.com. 2012-01-28. Retrieved 2013-11-04.

[toronto2-4] "Dufferin Bridges: Municipal Class Environmental Assessment" (PDF). City of Toronto.^{[permanent dead link]}

[5] "Dufferin Street Bridge Demolition and Installation of Temporary Crossing" (PDF). gordperks.ca.^{[permanent dead link]}

[options-6] LEA Consulting Ltd. (10 March 2011). "Structural Engineering Evaluation" (PDF). Dufferin Bridge EA Study. City of Toronto. Archived from the original (PDF) on 31 January 2016.

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v t e Bridges in Toronto
Crossing the Rouge River	Old Finch Avenue Bailey Bridge Sewells Road Bridge
Crossing the Don River	Cherry Street lift bridge Gardiner Expressway Old Eastern Avenue Bridge Queen Street Viaduct Gerrard Street Bridge Dundas Street Bridge Prince Edward Viaduct Rosedale Valley Bridge Leaside Bridge Sheppard Avenue Bridge
Pedestrian	Amsterdam Bridge Humber Bay Arch Bridge Lake Shore Boulevard Bailey Bridge Old Finch Avenue Bailey Bridge SkyWalk
Other bridges over waterways	Cherry Street Strauss Trunnion Bascule Bridge Vale of Avoca Bridge Governor's Bridge
Other	Crawford Street Bridge Dufferin Street bridges Harbord Street Bridge Sir Isaac Brock Bridge