 In the early 20th century, Stone & Webster was known for operating streetcar systems in many cities across the United States; examples include Dallas, Houston and Seattle.The company grew to provide engineering, construction, environmental, and plant operation and maintenance services, and it has long been involved in power generation projects, starting with hydroelectric plants of the late 19th-century; and with most American nuclear power plants.Stone & Webster was acquired and integrated as a division of The Shaw Group in 2000, and in 2012, the French engineering conglomerate Technip acquired Stone & Webster's energy and chemical business, and process technologies and associated oil and gas engineering capabilities from The Shaw Group.