In the early 1990s, HDR formally established a Sustainable Solutions Program tasked with integrating sustainability into all business practices. HDR's project, the William Jack Hernandez Sport Fish Hatchery, was the first to receive an Envision rating from ISI. Green Building Council has done for buildings. HDR also was one of the first firms involved with the Institute for Sustainable Infrastructure, which aims to do for infrastructure what the U.S. More recently, the firm received attention for its Sustainable Return on Investment (SROI) process, wherein clients evaluate sustainable strategies today and into the future. Green Building Council in 1994, and was involved in the development of the first Leadership in Energy and Environmental Design (LEED) Green Building Rating Tool. HDR was the first A/E firm to join the U.S. The company has since grown from 1,100 employees to over 11,000. An employee group bought back HDR in 1996 for $55 million. In 1983, Bouygues SA, France's largest construction company, purchased HDR for $60 million. Similar projects followed as the firm built water, sewer, electric, and road systems for cities and towns throughout the Midwestern United States, emerging from frontier status. The company's first project was designing a power station for the city of Ogallala, Nebraska. Circa 1950, Richardson and Durham had purchased shares in the firm, and it became known as Henningson, Durham and Richardson, Inc. "Chuck" Durham joined the firm in 1939 as interns. In 1917, the Henningson Engineering Company started as a civil engineering firm in Omaha, where HDR's headquarters remain today. ![]() Engineering News-Record ranked HDR as the 6th largest design firm in the United States in 2023. ![]() HDR is the 5th largest employee-owned company in the United States with revenues of $2.8 billion in 2022. The firm employs over 11,000 professionals and represents hundreds of disciplines in various markets. states and in 60 countries, including notable projects such as the Hoover Dam Bypass, Fort Belvoir Community Hospital, and Roslin Institute building. HDR has worked on projects in all 50 U.S. is an employee-owned design firm, specializing in engineering, architecture, environmental, and construction services.
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