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This 520-foot-long bridge is actually a flood-proof museum

Habitable bridges were a frequent sight during the Renaissance. The Bundanon Art Museum makes a compelling case for their revival.

[Source photo: Rory Gardiner/courtesy Kerstin Thompson Architects]

As climate change intensifies extreme weather, floods are becomingĀ more frequent and more severe. This has produced a wild variety of flood-proof structures, fromĀ floating office buildingsĀ that can rise and fall with the tide toĀ buildings that function as dams.

In Australia, one architecture firm has come up with an even bolder concept: putting a building on a bridge.

Located in a rural part of the countryā€™s southeastern coast, the $20 million Bundanon Art Museum is split across two buildings designed by Kerstin Thompson Architects (KTA).

The first is built into a hill to protect it from the bush fires that often ravage the region. The second doubles as a 520-foot-long bridge that stretches over a flood-prone gully.

Both structures highlight clever ways to use a complicated site, but the bridge building makes a particularly compelling case that habitable bridgesā€”a frequent sight during the Renaissanceā€”may still play an important role in the contemporary world.

[Photo: Rory Gardiner/courtesy Kerstin Thompson Architects]

There was a time when a bridge was more than a single-use structure spanning a river. From the famous Ponte Vecchio in Florence to the iconic London Bridge, dozens of bridges across Europe balanced shops and houses in space-starved walled cities.But with urban sprawl, the typology was eventually replaced by simpler structures designed to be traversed and forgotten.

In recent years, though, habitable bridges have slowly been making a comeback, from Zaha Hadidā€™s sinuousĀ bridge-meets-galleryĀ straddling River Ebro in Zaragoza, Spain, to the more somberĀ Art Center College of DesignĀ stretching over a gully in Pasadena.

At Bundanon, which opened in March, the architects drew inspiration from rural Australiaā€™s trestle bridges, which often carry trains over dramatic canyons. In this case, the train was replaced by a creative learning center with 32 rooms for artist residency programs, a cafĆ©, and a dining area.

The entire structure is crowned with a corrugated metal roof canopy and punctuated by open breezeways that offer sprawling views of a nearby river but also break up the long journey.

ā€œWe didnā€™t want gun barrel corridors,ā€ says Lloyd McCathie, a project architect at KTA.

[Photo: Rory Gardiner/courtesy Kerstin Thompson Architects]

The experience is breathtaking. But the reasoning behind is pragmatic. ā€œClimate variation is central to this experience,ā€ McCathie says.When it rains, the gully below the bridge fills up and funnels the water down to a trio of creeks nearby. Elevating the buildingā€”as high as 52 feetā€”means that architecture can coexist with nature without having to disturb the ecosystem.

It also distances it from potential wildfires below. (A perforated screen sits over the windows to prevent embers from landing inside.)

[Photo: Rory Gardiner/courtesy Kerstin Thompson Architects]

No amount of elevation will spare the building from fire, of course, but the bridge allowed the architects to preserve the site while responding to the regionā€™s constraints.ā€œWe couldā€™ve come into this site, raised it, and flattened it with earth-moving equipment, and that wouldā€™ve destroyed the place,ā€ McCathie says. ā€œIt is a unique concept to think of a building as a bridge, but thatā€™s a bit of a leap that we made.ā€

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