Officials say construction could begin this year on the K-25 History Center at the East Tennessee Technology Park in west Oak Ridge. Plans also call for an Equipment Building and Viewing Tower at the site. Although the projects depend upon funding, the goal is to finish the work by 2019. The K-25 site was one of three large sites built by the federal government in Oak Ridge during World War II to help make the world’s first atomic weapons as part of the top-secret Manhattan Project. Preserving its history is part of a Memorandum of Agreement that was signed in August 2012 and allowed for the complete demolition of K-25, once the world’s largest building under one roof. The historic preservation work is expected to cost about $20 million total.