Posts tagged with "Bridges":

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New York City Breaks Ground on High Bridge Restoration

Officials broke ground today on the long anticipated restoration of New York's High Bridge connecting the Bronx with Manhattan. Built in 1848 and today the city's oldest bridge, the 1,200-foot-long span had long been a popular strolling bridge, even making an appearance in Edith Wharton's 1913 novel Custom of the Country. The landmarked bridge was closed to the public in the 1970s, but after construction wraps up on the $61 million rehabilitation, strolling New Yorkers and bicyclists can once again cross high above the Harlem River—116 feet—and connect with the city's growing waterfront Greenway. (See also: Photos of High Bridge before renovation.) Improvements include pedestrian safety measures like accessibility ramps, viewing platforms, and new lighting. An eight-foot-tall cable mesh fence to prevent jumpers and throwing trash will also line each side, a point that drew criticism from some in the community who believe it's unnecessary and will spoil views. In a statement released at the groundbreaking ceremony, Mayor Michael Bloomberg called High Bridge "one of our city's great treasures." He continued, "It will bring people here from all over the five boroughs, and even all over the world, to see some of the most spectacular views in the city."
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When Artists Design Infrastructure: Basket-like Bridge Energizes San Gabriel Valley

The expansion of LA's Metro Rail Gold Line is well underway with a stunning new piece of infrastructure: The Gold Line Bridge. Completed last week, the 584-foot dual-track bridge, stretching over the eastbound lanes of the I-210 Freeway, will provide a light rail connection between the existing Sierra Madre Villa Station in Pasadena and Azusa’s future Arcadia Station. The rail line itself is scheduled for completion in 2014. Made from steel reinforced concrete with added quartz, mica crystals, and mirrored glass, the monochromatic, abstract design, conceived by artist Andrew Leicester, pays homage to the region’s historic American Indian basket-weaving tradition and includes a carriageway and a post-and-lintel support beam system. The 25-foot baskets adorning each of the posts, “metaphorically represent the Native Americans of the region...and pay tribute to the iconic sculptural traditions of Route 66,” wrote Leicester. The  bridge is is also designed to withstand significant earthquakes. Equipped with "Time Domain Reflectometry" technology and an electrical feedback smart column technology system, engineers can initially assess damage following a tremor. The structure replaces one removed after the 1994 Northridge Earthquake and is truly an exception to the norm of form follows function. The 11.5-mile Foothill Extension project, overseen by the Metro Gold Line Foothill Extension Construction Authority, is being built by Skanska USA and their subcontractor AECOM.
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Construction Progresses on Brooklyn’s Squibb Park Pedestrian Bridge

Before the end of this year, the Squibb Park Pedestrian Bridge will be completed connecting Brooklyn Heights with the Brooklyn Bridge Park on the waterfront. This windy path over the BQE and through the treetops will quite literally bridge the divide and substantial grade shift between the neighborhood and the park. Construction of this $4.9 million pedestrian bridge, made of black locust timber and galvanized steel, is already underway, and on December 14th and 15th, the spans will be hoisted into place over Furman Street. HNTB's chief engineer Ted Zoli chose materials that were consistent with the landscape design of Brooklyn Bridge Park designed by Michael Van Valkenburgh. “The bridge is very light weight. You will feel yourself walking across the bridge,” Zoli said at a hard hat tour of Squibb Pedestrian Bridge at Brooklyn Park this afternoon. While the pedestrian bridge represents a contemporary solution, it is also a throwback to a pre-Robert Moses era when there was direct access to the water before the highway was built. “It is like a gangway,” said Zoli. “It is like how you used to walk to vessels on the water.”
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Separated At Birth? Meet the Sixth Street Viaduct’s Mission Impossible Cousin

We could't help noticing that LA's new Sixth Street Viaduct, which is being designed by a team led by HNTB, bears a striking resemblance to Dubai's Meydan Bridge, the royal VIP entrance to the Meydan racetrack where the prestigious Dubai World Cup is held annually. The bridge was featured in the recent film, Mission Impossible: Ghost Protocol, but sits empty for most of the year. Of course there are differences between the two: Meydan's arches are made of steel, not concrete, it's not cable-stayed, and its upper arches don't touch the ground, but they're still very close in all their wavy glory. Judge for yourself below. HNTB's Sixth Street Viaduct in Los Angeles: VS The Meydan Bridge in Dubai.
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Videos> Three Proposals for LA’s Sixth Street Viaduct Animated

In September, AN reported on the three proposals to replace Los Angeles' iconic but crumbling Sixth Street Viaduct by HNTB, AECOM, and Parsons Brinckerhoff. The three teams have notably added pedestrian amenities and adjacent lush landscaping to the 3,500-foot-long cable-stayed span. While the renderings were compelling for each design, these video renderings fly the viewer in and around each proposal for a more detail view of what might soon be built in LA. Take a look. Courtesy AECOM Courtesy Parsons Brinckerhoff Courtesy HNTB [Via Curbed LA.]
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Koons, Meier Among Design Selection Team for Tappan Zee Replacement Bridge

Jeffery Koons, perhaps best known for his quirky stainless steel glossy sculptural reproductions of balloon dogs, has been called upon by Governor Andrew Cuomo to help decide what the new Tappan Zee bridge will look like. Koons, along with Richard Meier, winner of the Pritzker Prize for Architecture, and Thomas Campbell, Metropolitan Museum of Art Director, were named to the selection design team that will provide counsel on the construction of the Tappan Zee replacement bridge.  Governor Andrew Cuomo announced the decision in a press conference Wednesday. Meier’s most notable work includes the Getty Center in Los Angeles, the Barcelona Museum of Contemporary Art and the Jubilee Church in Rome. The design team will offer advice on the bridge’s aesthetics and visual compatibility with the surrounding nature. “Another day, another big step toward creating a new bridge to replace the Tappan Zee which will be stronger, safer, better as well as one which will live up to the beauty and splendor of the Hudson River,” said Cuomo in a written statement issued earlier in the day. “For this project we are creating a different kind of selection team… a team that combines technical experts, architectural experts, local experts, as well as artists to ensure the new bridge is the best choice and fit for the region.” Cuomo will appeal for a 2.7 billion dollar federal government loan for the 5 billion dollar bridge, which has an anticipated construction date starting in early 2013 and expected completion date of 2017. The deteriorating current bridge, the longest in New York, was constructed in 1955 and crosses the Hudson River at one of its widest points between Westchester and Rockland counties.
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Slideshow> High Time for the High Bridge Pedestrian Bridge

There’s a scene in Edith Wharton’s 1913 novel Custom of the Country, where the wicked vixen Undine Spragg insists on speeding across the High Bridge in a “horseless carriage” before making her grand entrance at a party so as to rouge her cheeks with a cold snap of air whipping up from the Harlem River. The romantic fascination accorded the then-65-year-old bridge quietly slipped from New York’s consciousness as bigger engineering marvels usurped its quiet dignity. Now approaching 165 years, renovations are about to get underway to finally restore the bridge to its former glory as a 1,200-foot-long pedestrian bridge, uniting neighborhoods of High Bridge and Washington Heights in the Bronx and Manhattan. New Yorkers for Parks stopped by the span Monday afternoon to document current conditions before construction is in full swing, giving us a hint of Undine's views. Though controversial netting integrated into the design might mildly disrupt the vista, Monday’s photos show it the way it was, albeit slightly overgrown.
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Calatrava’s First U.S. Vehicular Bridge To Open

The latest bridge from Spanish tension-element guru Santiago Calatrava, renowned architect behind the Milwaukee Art Museum, Puente del Alamillo, and the upcoming World Trade Center Transportation Hub, will be his first vehicular bridge in the United States. Construction has been completed on the Margaret Hunt Hill Bridge, the first in a series of Calatrava-designed crossings over Dallas' Trinity River. It will act as a literal and metaphorical gateway to the city. This new bridge links the banks of the Trinity River, with hopes of making the area a lively gathering place. Calatrava wants to rethink the riverfront and its capacity to bring in development as part of the city's urban revitalization efforts. He stated he envisions the Trinity River Corridor as the heart of the city, a recreational area much like New York's Central Park. The bridge is the first step in making the waterfront a focal point for recreation. “During my first visit to Dallas I realized that the river basin had the potential to be of defining importance to the city’s future development,” said Calatrava. The structure is a signature Calatrava design with glowing white arch and supporting suspension cables. Supporting over 14,000 cars per day, the new bridge is part of a larger project involving the replacement of Interstate Highway 30. The Trinity Trust Group, a nonprofit supporting revitalization of the riverfront, will host a series of inaugural events, and Calatrava will be in Dallas this weekend for an opening ceremony complete with fireworks, a Lyle Lovett concert, and a ribbon-cutting ceremony.  (Fingers crossed that the architect himself will hoist the giant scissors.)  The bridge is planned to open to traffic March 29.
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Bridge 5721: Historic Restoration and Relocation

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Laser scanning technology helped a Minnesota bridge find its third home

One of 24 historic bridges chosen for preservation by the Minnesota Department of Transportation, Bridge 5721 is one of the state’s only remaining wrought iron bridge structures. The bridge was originally built to carry pedestrians over a river in Sauk Center, Minnesota, in 1870, before modern steel production methods had become available. In 1937, the bridge was disassembled and moved to span the Little Fork River near the town of Silverdale. But more than two years ago, the structure began its journey to a third incarnation, this time as an equestrian and pedestrian bridge for the Gateway Trail in the town of Stillwater, near Minneapolis. Because of the bridge’s provenance and the desire to keep its wrought iron parts intact, the Minnesota DOT worked with new owner Minnesota Department of Natural Resources and structural engineers at HNTB and Olson & Nesvold Engineers (O.N.E.) to collect crucial data for the rehabilitation using new 3-D laser scanning technology.
  • Fabricators White Oak Metals (steel); HNTB, Olson & Nesvold Engineers (O.N.E) (design)
  • Engineers HNTB, Olson & Nesvold Engineers (O.N.E) (design)
  • Location Stillwater, Minnesota
  • Status Complete
  • Materials Steel, lightweight concrete
  • Process 3-D laser scanning, steel fabrication, historic restoration, relocation
While the project’s main goal was to preserve the 162-foot-long bridge’s historic character, the team nevertheless recognized that certain parts would have to be replaced to ensure the structure’s safety and longevity. Because original plans for the span were unavailable, MN DOT surveyors used a Leica laser scanner to create a 3-D map of the structure before it was disassembled. The scanner fires a laser more than 50,000 times per second, collecting data from reflected light. Placing the camera in nine different locations over the course of two days, the team collected more than 13,000 million data points with x, y, and z coordinates. After each truss member was removed, it was placed on a scanning table and fastener patterns were scanned. The geometric data created a point cloud of the bridge, allowing the team to isolate specific members or generate and view sections even after the span was dismantled and put into storage. See a video of the laser scan below: The team also made detailed drawings of two floor beams to be replaced at either end of the structure. These were given to steel fabricator White Oak Metals, who was able to create new beams that would fit into the structure with the original connections. Other updates included the replacement of roller nest bearings with elastomeric bearings and replacement of 10 steel stringers that had been added after the 1937 move. The 17-foot-wide wooden deck was replaced with lightweight concrete deck to minimize the structure’s dead load. Photos taken more than 100 years ago show that the bridge’s portals originally had a clearance of 14 feet. These had been raised two feet after the move to Silverdale. Using their laser scans, the team determined the fastener patterns of the existing portals and used these to detail replacement portals that would return the bridge to its original clearance. Once steel fabrication was completed last year, erection crews reassembled each truss on the ground in its new Stillwater location. Two cranes slid it into place on new concrete abutments, then the concrete deck, safety railing, and a new four-coat sealing paint system were added to ensure the structure’s continued longevity under its new title, Bridge 82524. See a video of the installation below:
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“Architecture of Consequence” Opens in San Francisco

Last night, the AIA SF launched a new exhibition, Architecture of Consequence: San Francisco, kicking off a whole slew of events in its annual Architecture in the City Festival, the country's biggest such celebration of the built environment. The exhibit explores important social needs that architects can address and features the work of four San Francisco firms—Iwamoto Scott Architecture, Fletcher Studio, SOM, and Envelope A+D—side-by-side with four Dutch firms—Van Bergen Kolpa Architecten, 2012 Architecten, ZUS (Zones Humaines Sensibles), and OMA. Originally conceived by the Netherlands Architecture Institute in 2009, this spin-off of the internationally touring exhibit shows that similar preoccupations are on the minds of architects everywhere—whether it's renewable energy, adaptive reuse, local food production, or thoughtful urban infill. David Fletcher gave the whole exhibit a major boost of local flava with Beta-Bridge (above), "a radical reinvention and reuse of the soon-to-be-demolished eastern span of the existing Bay Bridge." He proposed to load the upper deck of the bridge with medical cannabis greenhouses and the lower deck with a data farm; the water used to irrigate the cannabis plants would circulate down and cool off the chugging servers. On the other end of the scale, OMA revisualized the world in terms of energy. In lieu of standard geopolitical boundaries, it divided the European continent into areas such as Biomassburg, Carbon Capture and Storage Republic (CCSR), and Solaria. The exhibition continues through October 21, and each of the San Francisco firms has been paired up with a Dutch firm to give a discussion about their shared interest over the course of the month (see schedule of talks). The Architecture and the City Festival runs through the end of the month, with in-depth tours of new projects such as Bar Agricole (September 10), the ever-popular Home Tours (September 17-18), and a unique opportunity to experience what it's like to navigate the city without sight ("Acoustic Wayfinding for the Blind," (September 20) led by architect Chris Downey, who talked about losing his sight in a 2010 issue of AN). Check out the full calendar of events.
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Quick Clicks> Music Under Foot, Village Underwater, Carmageddon On Bike, & Destruction Online

Chimes Bridged. It seems there's something to making music while we walk. First a Swedish architect designed piano stairs and now an artist has created a musical bridge. Blending the sculptural, auditory, and kinetic, artist Mark Nixon designed a whimsical bridge that "sings." Chimes hidden below the span are activated as visitors walk across, Gizmodo says. The musical creation was last displayed at Sculpture by the Sea, an exhibition in Aarhus, Denmark. Village Uncovered. Villa Epecuen, a town located on Lake Epecuen, southwest of Buenos Aires, was flooded in 1985, but now after more than two decades, the water is receding. Photographs by The Atlantic uncover a strange, haunting landscape: aerial views expose the original street layout of the town, while others reveal original trees and cars visible amid the rubble. Carmageddon Averted. For two days last weekend, the busiest stretch of highway in America—the 405 Freeway in LA—was shut down for construction. While many feared disastrous traffic jams bringing life in LA to a halt, it turns out that life went on without incident, according to the LA Times. During the traffic-non-event, JetBlue offered to fly residents between two of the city's airports in Burbank and Long Beach, sparking a challenge from cyclists who said they could make the trip faster. As reported in Slate, it turns out the bikes were right, making the trip nearly an hour-and-a-half faster than by plane. Destruction Archived. Information Aesthetics points us to the “Hiroshima Archive” which documents the extensive societal and structural devastation the atomic bomb caused 66 years ago. Using Google Earth’s virtual globe, the digital archive exhibits topographical maps, contemporary building models, photographs, and personal accounts from the Hiroshima Peace Memorial Museum, the Hiroshima Jogakuin Gaines Association, and the Hachioji Hibakusha (Atomic Bomb Survivors) Association.
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After Five Years, Could Venice Get its Doge’s Palace Back?

The 17th-century Sospiri Bridge (Bridge of Signs) in Venice connects an ancient prison with interrogation rooms in the Doge’s Palace. The bridge crosses the Rio de Palazzo that itself slices through the palace and makes a spectacular vista as one crosses the canal bridge on the Grand Canal. This vista has been rudely emblazed for at least the past five years by a giant advertising sign the wraps the palace walls and over and under the beautiful Sospiri bridge. Finally the Art Newspaper reports that after a campaign led by the British charity Venice in Peril Fund and signed by Norman Foster, Glenn Lowry, and other sculptural dignitaries the sign will be taken down after the contract ends. The sign has been raising about 40,000 Euros a month to help maintain the Doge’s palace. Further, the newspaper reports that Italy’s cultural minister,  Giancarlo Galan, claimed “the advertisers themselves must be finding that they are bad publicity.” Venice is of course faced with many other (perhaps more serious) issues like its declining population of full-time residents (from 200,000 to 70,000) over the past 15 years, but the removal of this vulgar signage is some progress for the serene republic!