View Featured Projects

In The News

San Francisco-Oakland Bay Bridge New East Span Wins International Association for Bridge and Structural Engineering (IABSE) Outstanding Structure Award 2015
September 30, 2015

T.Y. Lin International Announces Grand Opening of Tilikum Crossing, Bridge of the People in Portland, Oregon
September 14, 2015

Selected highlights from more than six decades of T.Y. Lin International Group history, including some of our most significant company milestones and groundbreaking projects.



Tung-Yen Lin, known as “T.Y.,” was born on November 14 in Fuzhou, China.


T.Y. Lin joins the faculty at UC Berkeley and he begins his innovative research in pre-stressed concrete that leads to significant advancements and the firm’s early focus.


T.Y. Lin founds T.Y. Lin Associates in Los Angeles, which later became T.Y. Lin International.


T.Y. Lin introduces the concept of constructing a bridge across the Bering Strait, known as the Intercontinental Peace Bridge. Designs the 13-story, 1800 Pacific Building in San Francisco, one of the earliest structures to use post-tensioning to control lift slab deflection.


The firm relocates to San Francisco, increasingly expands its specialty in pre-stressed concrete to broader consulting services with designs that include conventionally reinforced concrete, structural steel, masonry, and timber-framed structures.


T.Y. Lin International completes the design of the Bank of America in Managua, Nicaragua, an 18-story shear wall office building. The reinforced concrete tower was one of two structures left standing after an earthquake shook downtown Managua in 1972.


International growth begins with T.Y. Lin International offices established in Taipei and Singapore.


T.Y. Lin International completes the Rio Higuamo Bridge in the Dominican Republic, the first pre-stressed, concrete segmental long-span bridge constructed in the Western Hemisphere.


Growth increases with new offices in Kuala Lumpur. Merger with Maine-based Hunter-Bellow Associates.


T.Y. Lin International designs the Moscone Convention Center in San Francisco, which uses long-span bridge technology for the 250,000-square-foot, column-free grand exhibit hall.


T.Y. Lin receives the National Medal of Science from President Ronald Reagan.


T.Y. Lin International completes the award-winning design of the Smith Avenue High Bridge in St. Paul, Minnesota. The use of high-strength steel strands in the arch ties is one of the most innovative features of the design.


T.Y. Lin International Group is acquired by DAR Group, an international network of professional service firms, comprised of over 12,000 staff members located in 45 countries around the world.


Period of geographic and service capabilities growth marked by significant acquisitions of California-based McDaniel Engineering, Chicago-based BASCOR, Washington’s DGES Consulting Engineering, and New York’s DRC Consultants.


Following the Loma Prieta earthquake in California, T.Y. Lin International plays a central role in the development of new and advanced techniques; practical engineering tools; and design standards for bridge assessment; seismic retrofit of existing structures; and the design of new bridges.


T.Y. Lin International Group’s presence in Asia Pacific expands with the opening of an office in Chongqing, China.


Dr. Tang becomes Chairman of the Board of T.Y. Lin International.


T.Y. Lin International begins work on the San Francisco-Oakland Bay Bridge. The single-tower, Self-Anchored Suspension (SAS) design is selected for the new Eastern Span of the San Francisco-Oakland Bay Bridge.


Growth continues with acquisitions of Miami-based H.J. Ross Associates, Inc., Northern California’s CCS Planning and Engineering, multi-location FRA Engineering and Architecture, and Medina Consultants on the East Coast, further bolstering service offerings across multiple lines of business including ITS/traffic engineering, airports, rail and transit, water resources, and more.


T.Y. Lin International begins design of the reconstruction of the Wacker Drive and Congress Parkway interchange for the City of Chicago as well as part of the Wacker Drive Viaduct.


Taiwan High Speed Rail is completed. T.Y. Lin International was responsible for the preliminary and 90% final design of 25 elevated bridges across Taiwan.


T.Y. Lin International serves as the Engineer of Record for McDonald’s in the Southeastern U.S., New York State, and Pennsylvania.


The New Benicia-Martinez Bridge opens with unique features that are a first in California. Its lightweight, high-strength concrete superstructure spans up to 200 meters in length, built by cast-in-place balanced cantilever method.


T.Y. Lin International completed engineering design and construction phase services for the $360 million South Terminal Expansion Program at Miami International Airport. The firm was also the engineer-of-record for landside roadways adjacent to the South Terminal facility.


T.Y. Lin International was selected to provide ongoing flood insurance studies and flood insurance rate maps in support of FEMA’s Map Modernization Program.


The historic Hoover Dam Bypass Bridge opens to traffic.


Construction for the Port Mann Bridge for which T.Y. Lin International is the lead design engineer is completed.


The new San Francisco-Oakland Bay Bridge is California's largest public works project to date and was completed with T.Y. Lin International as the Engineer of Record.