Posts tagged with "Bridges":

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Architect's Plan Would Add A Bike and Pedestrian Tube to San Diego's Coronado Bay Bridge

From the top of San Diego's soaring 200-foot-tall Coronado Bay Bridge, architect Lew Dominy says you can see Mexico, but outside of special events when the bridge is closed to automobile traffic, pedestrians and bicyclists who might stop to admire the view are prohibited. Dominy, principal at San Diego-based domusstudio architecture, has a plan to build a tube through the distinctive archways of the Coronado's support piers that would bring multi-modal access to the bridge. Dominy hatched the concept three decades ago while riding his bike across the bridge during a special event. "When you're 200 feet in the air looking at the city, it's just an unbelievable view," Dominy said. At the time he was interning for the the Coronado Bay Bridge's designer Bob Mosher, and developed an interest in the 11,179-foot-long span connecting the cities of San Diego and Coronado. Dominy shelved the proposal, but recently began promoting the concept anew. Over the past six months, he has been meeting with officials from the US Navy, the Cities of San Diego and Coronado, the bridge's owner CalTrans, and others to promote the idea and determine if the project is feasible. Dominy said the response so far has been positive. "With all the agencies and jurisdictions involved, this will take some time to become real," Dominy said in an email. "But the momentum is building, and we have gotten very positive responses everywhere we've been with the project. We think it could be an iconic draw for cyclists and runners and visitors to San Diego." The plan, estimated to cost around $50 million, calls for a steel cylinder to be built inside the 12-foot-diameter pier arches, with structural attachments to the bridge's existing steel box girders. After speaking with engineers who retrofitted the bridge for earthquakes a decade ago, Dominy said "it appears from initial analysis that no extra support is needed" for the new bike tube. The bridge is built with a 4.7 percent grade, meaning the ascent and descent over the two mile length of the bridge fit within existing ADA regulations. Dominy said the tube structure would be open but include railings and other protections to keep people from falling or jumping. He said the design could also include viewing areas at various points with glass floors to heighten the drama of the view. To move the project forward, Dominy hopes to raise funding for a feasibility study, that among other things, will help determine if adding the bike and pedestrian tube will impact clearances of large ships that move underneath the bridge.
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One Year After Dallas' First Calatrava Bridge, Another On The Way

It’s been nearly a year since the Santiago Calatrava-designed Margaret Hunt Hill Bridge opened in Dallas. Part of an overarching plan to redevelop the banks of the Trinity River, the cable-stayed bridge’s 400-foot-tall central arch pylon has given the Big-D a much-needed civic icon in the otherwise flat and uninhabited swath that the watercourse cuts through the urban fabric. These photos, taken by budding young photographer Halle Darling-Menking, convey something of the motion and excitement motorists experience while traversing the span. The lines of the cables seem to warp and flex, the arch itself to deflect and lean. Fans of the crossing now have something more to cheer about. In January, the Dallas City Council approved funding for a second Calatrava-designed bridge across the Trinity, this one expected to cost $115 million. The second bridge, to be known as the Margaret McDermott Bridge, will replace the current Interstate 30 span. It features two arches running parallel to the span supporting pedestrian and bike paths. Construction will begin this spring and completion is expected by May 2017.
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When New York's East River Froze Over

It's been a mild winter so far in New York, and with the first onset of below-freezing temperatures, city folk are donning their heavy jackets and gloves. And while the winds whipping around the glass and steel towers of Manhattan might feel as if it's as cold as it's ever going to be, consider a century ago when temperatures were low enough to freeze the East River from the banks of Brooklyn to the Manhattan waterfront, still two different cities at the time, providing thrill-seeking pedestrians with an instant new crossing years before the Brooklyn Bridge was built. The above view was engraved in 1871 and titled, "Crossing the East River on the Ice Bridge," depicting dozens of New Yorkers walking across what would normally have been a busy maritime thoroughfare. While such a natural feat seams unlikely today, Gothamist has collected clippings to show that the phenomenon was known to occur around once a decade on the East River during the 19th century and there have been reports of similar frozen-river bridges along the Mississippi and Ohio Rivers as well. For instance, in 1851, an estimated 15,000 pedestrians, horses, and sleighs crossed the frozen river.
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Cable-Stayed Replacement For Desmond Bridge Unveiled In Long Beach

If you have ever seen the film To Live and Die in L.A. then you know the Gerald Desmond Bridge. It has a starring role in the opening sequence, when Treasury agent Richard Chance (played by William Peterson) bungee jumps off of it. You probably haven't bungeed off it yourself, but If you've ever driven across it, you might get why it needs replacing. The original bridge, according to the project website, "is nearing the end of its intended lifespan." In fact, the old bridge, while considered safe, is a little scary. Netting has been suspended beneath it to catch pieces of falling concrete. Additionally, its approaches are too steep, it's too narrow, and perhaps most importantly, the newest container ships can't fit under it. That bridge that will soon be a thing of the past. On Tuesday, January 8, Caltrans, Metro, the Port of Long Beach, and the US Department of Transportation broke ground on the $1 billion joint project to build the state-of-the-art replacement bridge for what is considered one of the nation's most critical transport hubs. The projected five-year construction period is also expected to generate significant economic activity in the region, including thousands of project-related jobs. The new cable-stayed bridge will feature 500-foot-tall towers and an observation deck 200 feet above the water. The design also incorporates bike lanes and pedestrian walkways. The joint venture includes Shimmick Construction Company, FCC Construction S.A., Impregilo S.p.A., with engineering by Arup North America and Biggs Cardosa Associates.
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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.