Changing Skyline: Arch St.'s a bad place for ultra-tall and dense tower

December 05, 2008|By Inga Saffron, Inquirer Architecture Critic
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  • Rendering of the sixth-floor public plaza and outdoor garden of the proposed American Commerce Center, with a view to the Arch Street Presbyterian Church and the city skyline.
  • Rendering of the sixth-floor public plaza and outdoor garden of the proposed American Commerce Center, with a view to the Arch Street Presbyterian Church and the city skyline.
  • The proposed American Com- merce Center, which at 1,500 feet would be the city's tallest tower. Top, a view of the 18th Street entrance to a six-level mall, with glass elevator in front.

What is it about a really tall skyscraper that makes people fall into a swoon?

Ever since developers unveiled their design for a 1,500-foot office tower called the American Commerce Center, supporters have been behaving like teenage girls at the opening of Twilight. When the Philadelphia Planning Commission held a hearing on the project recently, fans swarmed the meeting room, hoisting printed signs as if they were rally towels.

"BUILD IT!" the signs demanded in upper-case letters. The accompanying rendering depicted the slick glass behemoth towering over a puny Comcast Center.

Yes, they should build it. But let's hope city officials make them build it better.

Story continues below.

Like the smitten everywhere, partisans of the American Commerce Center (ACC) are inclined to offer their love unconditionally. They're so entranced by the record-breaking stature of the proposed skyscraper that they seem not to have noticed that the object of their affection is a fat, hulking copycat.

It's not like the city hasn't been accommodating. This week, City Council's rules committee endorsed a bill to increase the height allowance at 18th and Arch Streets, a move that virtually guarantees final passage by the full membership this month. The increase, to a generous C5 classification, is the first of two zoning changes required before the ACC tower can soar past the reigning height champ, the 975-foot Comcast building.

Fortunately, the new zoning designation won't take effect until city planners approve a final architectural design. The negotiations will be a crucial test of Mayor Nutter's campaign promise to allow planners a free hand with developers.

Their goal should be to put this complex on Slim-Fast. There's nothing inherently wrong with a 1,500-foot skyscraper downtown - assuming the developer can find tenants to populate it. Dense mixed-use projects are good for cities and good for the environment. They bring people and activity, while deterring sprawl elsewhere.

But it is possible to have too much density. ACC's developers, led by Hill International, are attempting to pack in way more stuff - 2.2 million square feet - than the modest 1.5-acre site can handle. Along with the office tower, they envision a 477-foot-high interlocking hotel, a six-level shopping mall, movie theaters, meeting rooms, and a 369-car underground garage.

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