Museum at the Gateway Arch
St. Louis
Best Project and Project of the Year Finalist

Developer:Gateway Arch Park Foundation
Owner:National Park Service
Lead Design Firm:Cooper Robertson
Associate Architect:Michael Van Valkenburgh & Associates Inc.
General Contractor:麦卡锡建筑公司。
Structural Engineer:Alper Audi Inc.
土木工程师：David Mason + Associates
M/E/P Engineer:IMEG Corp.

The public-private partnership that delivered the $109-million expansion and renovation of the Gateway Arch Museum was the first P3 project delivered in a National Park. There were stringent rules on how the landscape could be altered, what materials could be used and how much the existing museum could be changed. The iconic arch had to stay open throughout construction as well.

McCarthy was chosen for three of the major contracts, says Andy Poirot, project manager at the contractor. “Just coordinating all those together was quite a challenge. At the end of the day, anybody that goes and visits the site can see how great it really is when you really get a lot of different teams working hard, pulling in the same direction to achieve a great outcome,” Poirot says.

The size of the underground museum was doubled thanks to a 46,000-sq-ft addition. The Gateway Arch Park Foundation—the nonprofit organization that became the P3 developer—and other community and public groups raised $221 million in private money for the project, which includes 70 acres designed by Michael Van Valkenburgh & Associates.

“To get this project done you had to have the National Park Service, the city of St. Louis, the state of Missouri, through our department of transportation, a private community represented by our foundation, the Great Rivers Greenway [and] our regional transit authority that also runs the trams in the arch moving in the same direction,” says Ryan McClure, executive director of the Gateway Arch Park Foundation. “I think the reason you didn’t see it happen in years past, the 50 years of the arch’s existence, was just because all of those folks weren’t at the table together, moving toward a common goal of reimagining the arch experience for all.”

挑战超越物流有限公司luded several rainy years that raised the height of the Mississippi River, which has its own section in the underground museum that explains the river’s role in westward expansion. That pushed the new museum’s opening back to 2018. The difficulty of finding accurate records for the arch grounds also created problems. Many were inaccurate and incomplete. McCarthy’s subsidiary, Castle Contracting, used ground-penetrating radar to detect electrical current from buried power lines and other subsurface mapping technologies to locate as many underground obstacles as possible before the construction team began excavation.

建筑团队，国家公园管理局执法和博物馆工作人员之间的持续沟通有助于使门户拱门在整个项目的期限内保持开放和全面运作。需要大约2,400立方英尺的混凝土来构建低位，铸造后增强的混凝土结构。阿尔珀·奥迪（Alper Audi）和麦卡锡（McCarthy）共同开发了一个现场混凝土模型，使团队能够确定在固化过程中达到的温度在ACI中推荐的公差。结果，使用原始混合设计将墙壁放置在没有任何固化问题的情况下。库珀·罗伯逊（Cooper Robertson）和范·瓦尔肯伯格（Van Valkenburgh）的设计使博物馆能够传达有关向西扩张的历史，并讲述了拱门建筑的故事。

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