The unit of the Manhattan Project National Historical Park based at the Hanford site brought nearly 20,000 visitors and pumped hundreds of thousands of tourism dollars into the Tri-Cities in 2024. 

The National Park Service detailed the financial impacts from the multi-site national park in its report on visitor spending at all national parks in 2024. All told, visitors spent $29 billion in communities near national parks, according to the agency.  

The lodging sector benefited the most from that spending, with $11.1 billion in economic output. Restaurants received the next greatest direct contribution with $5.7 billion in economic output.   

The Manhattan Project National Historical Park was established in 2015. The Hanford site, with the B Reactor as its centerpiece, generated $733,000 in visitor spending in the Tri-Cities, the least visitor spending of the three units that make up the park. The park recorded a total of 19,644 visits.

The unit at Oak Ridge, Tennessee, recorded $2.8 million from nearly 30,000 visitors. The unit at Los Alamos, New Mexico, had more than 25,000 visitors who spent an estimated $1.8 million in the community.