This monumental and famous bridge retains its landmark status, despite severe
alteration of the design of the bridge through loss of the original stiffening
truss. The use of pony truss stiffening was a trademark and key feature of
suspension bridges designed by the Canadian firm of Monsarrat and Pratley. In
2000-2001 the entire original stiffening truss system was demolished and
replaced with a modern structure, that looks like an extremely shallow deck
truss. The loss of original material as well as the replacement of the original
design stiffening truss with an unusual design that looks nothing like the
original engineer's design is a major alteration to this bridge and severely
reduces its historic integrity. Also, another trademark of Monsarrat and
Pratley, which was to use unusual paired suspenders with spacers was lost. The
bridge still has unusual paired suspenders, but the spacers were not replaced.
The spacers gave the bridge an unusual appearance. Please see the
Pont de l'Île-d'Orléans Bridge as it is one of the only unaltered surviving
Monsarrat and Pratley suspension bridges. Despite the severe alteration of this
bridge and loss of probably over 50 percent of the original steel on the bridge,
the towers remain original and the famous lion sculptures at the ends of the
bridge remain. Despite alteration, due to its monumental size and importance to
the region, the bridge is a designated National Historic Site of Canada. Contractors for the bridge were Dominion Bridge Company (superstructure) Hamilton and Chambers (superstructure) Stuart Cameron and Company (approach viaducts).
Located in Vancouver, the Lions Gate Bridge National
Historic Site of Canada is the longest suspension bridge in Western
Canada with a total length (including approach spans) of 1517 metres.
The bridge has three traffic lanes, an electronic signage system and a
pedestrian and cyclist sidewalk on either side of the deck. It serves as
a major transportation link for communities throughout the region on
both sides of Burrard Inlet. The site includes the south entrance to the
bridge that emerges from Stanley Park National Historic Site of Canada,
near Prospect, the main span, which is supported by twin towers, and the
viaduct on the north shore located in a land corridor that crosses
Capilano Indian Reserve.
Heritage Value
The Lions Gate Bridge was designated a National
Historic Site of Canada in 2004 because: - it is an outstanding
landmark and has a significant symbolic value to Canadians; - it is
distinctive by its elegant design which complements a spectacular
setting; - it is an outstanding engineering achievement for its time
in its advanced technical features; and, - it had an undeniable and
significant influence on the development of Vancouver.
Identified
as one of Canada's technical and engineering landmarks, the Lions Gate
Bridge is noted for its innovative civil engineering. When built it was
recognized as the longest suspension bridge in the British Empire and
one of the biggest construction projects undertaken in Canada during the
1930s. Despite its enormous size, the open steelwork of the twin towers
and pioneering use of a thin deck gave the structure a light weightless
quality that blend well with its picturesque setting. The bridge was
remarkable because of its length and the technical innovations in cable
use and construction. The reconstruction of its deck at the turn of the
twenty-first century was also an exceptional achievement, marking the
first time that the deck, hangers and stiffening trusses of a suspension
bridge were replaced simultaneously without closing the bridge to
traffic.
The bridge stimulated the geographic and socio-economic
development of the north shore of Vancouver. Financed by the brewing
tycoon, Sir Arthur Guinness, through a syndicate called British Pacific
Properties Ltd., the Lions Gate Bridge was commissioned to open up the
suburbs of West Vancouver for development by establishing a direct link
between Vancouver and the north shore of the First Narrows of Burrard
Inlet. The design of the bridge owed much to the vision of Victoria-born
Alfred J.T. Taylor, a prominent engineering contractor and industrialist
who had substantial land holdings on the north shore and who assembled
the financing for the project.
Despite upgrades due to increased
traffic flow and seismic concerns, the integrity of its aesthetic design
and the treatment of materials have been maintained.
Source:
Historic Sites and Monuments Board of Canada, Minutes, December 2003.
Character-Defining Elements
Key elements that define the heritage character of
the Lions Gate Bridge include: - its setting at the entrance to the
Port of Vancouver, spanning the First Narrows from Stanley Park to the
north shore with the backdrop of the Coastal Mountain Range; - its
form, scale and massing as expressed by its long, elegant form and large
scale; - its twin, tapered open work towers that consist of sections
of flat and angled steel; - its narrow stiffening trusses and thin
deck; - its reinforced concrete suspension cable anchors; - its
innovative steel-sheathed suspension cables consisting of galvanized
wires in a hexagonal configuration filled with treated cedar strapping
to form a round section covered with a continuous galvanized mild steel
sheath; - that each upright has a middle caisson the dimensions of
which are constant and two side caissons that narrow from the base to
the top; both uprights are stiffened by internal diaphragms and have
cross bracing and diagonal bracing to withstand lateral loads; - its
pylons, sculptural bases and surmounting lamps; - its distinctive
decorative night time lighting scheme; a gift to the City of Vancouver
from the Guinness family; - its two concrete Art Deco exposed
aggregate lion sculptures on pedestals at the south entrance by
Vancouver sculptor Charles Marega; - its Art Deco architectural
elements and fittings that form the south entrance to the bridge; -
its one bronze commemorative plaque on the east pilaster and three
bronze commemorative plaques on the west pilaster.
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