ASCE Seattle Section Joint December Meeting with Tacoma-Olympia
Topic: Interstate 395 Signature Bridge - by Mike Lamont of HDR
Join us for our joint meeting with the ASCE Tacoma-Olympia Section!
The “Signature Bridge” for the reconstruction of Interstate 395 near Downtown Miami is now under construction. Destined to become an icon, the bridge is the largest precast concrete segmental arch bridge in North America.
The Signature Bridge, named the Fountain, consists of six arches, its largest arch soaring 325 feet above the ground and spanning 650 feet across. A “floating” 1,025 feet suspended cast in place concrete deck spans two busy roadways. The 3D nature of the arches with splayed and unsymmetrical stay cable arrangement presents a unique bridge engineering challenge. Their design reflects an innovative deployment of segmental bridge technology to arch construction.
The design team responsible for this one-of-a-kind bridge design consisted of HDR staff in multiple offices, utilizing work-share tools and online collaboration skills developed on other design-build mega-projects to tap into nation-wide expertise. Presentation will cover key design aspects and project management, and in-progress construction photos will also be shared.
Mike Lamont
Mike Lamont, PE, SE, P. Eng. is HDR’s Major Bridges Technical Director, working out of Olympia, WA. As the I-395 Signature Bridge Engineer of Record, Mike provided technical direction and engineering management to the design team producing the structural modelling, analysis, and design.
Mike has over 30 years of complex bridge engineering experience, including cable-stayed bridges, concrete arches and steel tied arches, and segmental box girders. He has served as superstructure design leader on two award winning signature cable-stayed bridge projects in the Northwest: the Port Mann Bridge in Vancouver, BC, and the Tilikum Crossing Bridge in Portland, OR.
Mike has focused most of his career on the design and construction engineering of major cable-stayed, segmental, and arch bridges. He is well-versed in state-of-the-art seismic and wind design practices, with hands-on involvement in seismic analysis, wind-tunnel testing, and developing seismic and wind mitigation measures on several major bridge projects.
5:30 Welcome, Announcements
5:40 Presentations and Q&A
6:10 New Officer Inductions
6:20 Breakout Rooms
7:00 Adjourn