Discover / Manhattan Project Historic Sites
Save a National Treasure
Washington, New Mexico, Tennessee,
TYPE: Building
The electrical substation at Hanford, WA, a Manhattan Project site. | Photo: National Trust
The electrical substation at Hanford, WA, a Manhattan Project site. | Photo: National Trust
Establish the Manhattan Project National Historical Park.


The Manhattan Project marked one of the most transformative events in world history: the development of the atomic bombs that ended World War II and set the stage for the Cold War. While the initiative’s early focus was weapons based, additional applications for nuclear energy were later developed, leading to advances in the newly-emergent fields of chemotherapy, high-speed computer technology, genomics, and bioengineering.

National Significance

The Manhattan Project’s three primary sites – Los Alamos, NM; Hanford, WA; and Oak Ridge, TN – speak eloquently to the project’s enormous scale and the frantic, round-the-clock effort required to create an atomic weapon ahead of the enemy. These three locations were central to the mission of the Manhattan Project, and have been selected by the National Park Service as historic sites that would comprise the proposed Manhattan Project National Historical Park.

Campaign Goals

  • Partner with the Department of Energy and local officials to establish the Manhattan Project National Historical Park.

Ways To Help

Tell your Senators today to support S. 507 to create the Manhattan Project National Historical Park.

Donate to our campaign to protect Manhattan Project sites.

Tell us why Manhattan Project sites matter to you.

Posted on October 21, 2014

By Nancy Tinker, Project Manager

Knox Heritage and the East Tennessee Preservation Alliance are proud to announce the Alexander Inn Gala Preservation Celebration, an event scheduled for Oak Ridge, Tennessee on the evening of November 7th. Be the first to experience the newly restored and renovated historic Alexander Inn and celebrate this significant preservation achievement for East Tennessee and the nation. Step back in time and enjoy a 1950s era cocktail party while revisiting the Inn’s storied past and discovering its exciting new place as part of the future of Oak Ridge.

This special event will celebrate a multi-million dollar, year-long rehabilitation effort, with new ownership converting the former hotel to use as an assisted living facility. Constructed for World War II’s Manhattan Project, the Alexander Inn originally housed Manhattan Project scientists and military leaders. Manhattan Project guests included General Leslie Groves, Secretary of War Henry Stimson, and physicists J. Robert Oppenheimer and Enrico Fermi.

The successful rehabilitation of the Alexander Inn is an excellent example of how several entities can work together to save historic properties. This initiative involved a complex combination of assistance from the East Tennessee Preservation Alliance, the Tennessee Historical Commission, the implementation of federal historic tax credits, and participation of the Department of Energy and the Oak Ridge Industrial Development Board.

Posted on July 25, 2014

By Nancy Tinker

On Sunday evening, July 27, WGN will premiere a new television series, “Manhattan,” a beautifully executed period drama which brings 1940s’ Los Alamos, New Mexico, to vivid life. Tautly written and beautifully filmed, the story revolves around the top-secret Manhattan Project and the lives of Los Alamos’ (fictionalized) scientists and the family members accompanying them to New Mexico’s desert.

Written by Sam Shaw, of “Masters of Sex” fame, and Thomas Schlamme, director of “West Wing,” the 13-episode “Manhattan” series is a story which is at once provocative and engaging. This is the story of a world at war, the race to develop the first atomic weapon, and the moral implications confronting project scientists.

"Manhattan" premieres Sunday evening, July 27, at 9:00 pm ET. For additional information, follow this link:

Please check back often for additional updates on Manhattan Project Historic Sites.  Also, donate today to support the National Trust's ongoing work at this National Treasure.

Posted on July 08, 2014
Photo Credit: Great Beyond (via flickr)
Photo Credit: Great Beyond (via flickr)

Jessica Pumphrey Written by Jessica Pumphrey, Team Member

Last Friday, the Seattle Times published an opinion piece by poet and former Hanford engineer, Kathleen Flenniken, which spoke to the importance of preserving the three Manhattan Project sites.  In the piece, Kathleen shares her experience living just outside of the Hanford community and growing up in a place where two-thirds of the nation’s nuclear arsenal was manufactured in secret.

You can read more of Kathleen’s article here.

Please check back often for additional updates on Manhattan Project Historic Sites.  Also, donate today to support the National Trust's ongoing work at this National Treasure.

Posted on June 23, 2014

The Department of Energy, Oak Ridge Reservation has posted a video which relays the construction and the history of the K-25 Site.

Please check back often for additional updates on the Manhattan Project Historic Sites. Also, donate today to support the National Trust's ongoing work at this National Treasure.


Files must be less than 2 MB.
Allowed file types: png gif jpg jpeg.
By submitting this form, you accept the Mollom privacy policy.
Posts are moderated, and therefore do not appear immediately.
Bev on October 15, 2014
My father worked at the MetLab and rest of his career at ORNL. It was established that he died of the kind of lung cancer caused by contact with radioactive materials, so he literally gave his life to the Manhattan project without being drafted to fight in the military.
Ray Smith, Oak Ridge, Tenn. on August 02, 2012
It’s hard to imagine an entire city [Oak Ridge] existing in secret. 60,000 acres set aside for one, top-secret purpose. A discovery so huge it could end a World War. It’s hard to imagine – but it’s true.

Campaign Overview

Insufficient Protection

Support the Trust's Work
Contribute Now

Learn about other ways to help

Share This Campaign

Take Action Today

Now that the House of Representatives has passed the Manhattan Project National Historical Park Act, your Senators need to hear from you today to pass this bill to save these authentic sites for future generations. Time is running out on the 113th Session of Congress!


Presenting Partner


Leading Sponsor:

Help These Places Today

  • Photo by Ron Cogswell
  • Floating by Miami Marine Stadium, an entertainment venue off the Biscayne Bay. | Photo: Rick Bravo
  • The Battle Mountain Sanitarium was established by Congress in 1902. | Photo: National Trust
  • Boggsville has challenges typical of smaller historic sites.  Photo by Beau Blackburn.
  • Antiguo Acueducto del Rio Piedras. Courtesy of Para la Naturaleza
  • Photo by Amy E. McGovern
  • New York Studio School in New York City. Courtesy New York Studio School, 2009/Photo by Daniel Gerdes
  • Courtesy Tucson Historic Preservation Foundation
  • Photo by Alison King
  • Cliff Dwelling at sunset in Eastern Cedar Mesa. Photo by Donald J. Rommes
  • Photo by Carol Highsmith
  • Union Terminal. Courtesy Cincinnati Museum Center
  • Courtesy James River Association
  • Photo by Donna L. Ching
  • Photo by Burger International Photography
  • Villa Lewaro is the home of Madam CJ Walker. | Courtesy Historic New England/ Photo by David Bohl
  • Philip Johnson designed the Pavilion for the 1964-65 World’s Fair. | Photo: Duncan Kendall
  • Administration Building | Photo by Cynthia Lynn
  • Patayan-style rock art at Sears Point Area of Critical Environmental Concern. Photo by Robert Mark
  • Photo courtesy Franz Neumeier/
  • Save the Dome
  • Photo by James Higgins
  • The Mississippi Delta has been referred to as the "cradle of American culture." | Photo: National Trust
  • Sunset at Willamette Falls, the largest waterfall in the Pacific Northwest. | Photo: Brian Rockwell
  • The electrical substation at Hanford, WA, a Manhattan Project site. | Photo: National Trust
  • Union Station serves as a historic gateway to the Nation's Capital. | Photo: Carol Highsmith
  • The Milwaukee Soldiers Home was built in 1867. | Photo: Milwaukee Preservation Alliance
  • Pond Farm was the home/studio of prominent ceramicist Marguerite Wildenhain. | Photo: National Trust
  • Hinchliffe Stadium was built by public funds during the Great Depression. | Photo: Melissa Murphy
  • Photo by Gordon Beall
  • The Rosenwald Program improved education for African Americans in the South. | Photo: National Trust
  • Mount Taylor sits atop one of the richest reserves of uranium ore in the U.S. | Photo: National Trust
  • Lyndhurst is a site of the National Trust. | Photo: Brian Thomson/The Ethan James Foundation
  • The stone walls and moat of Fort Monroe. | Photo: Patrick McKay
  • The number of cruise ships in Charleston has increased exponentially. | Photo: National Trust
  • Auburn Avenue is a historically significant African American commercial area. | Photo: Stan Kaady
  • It was here that Joe Frazier trained for his victorious bout against Muhammad Ali. | Photo: Pete Marovich
  • Village of Zoar | Photo by Andy Donaldson
  • Princeton Battlefield is one of the Revolutionary War’s most significant battlefields. | Photo: Jon Roemer
  • Theodore Roosevelt first came to North Dakota in 1883 to hunt buffalo. | Photo: Dickinson State University
  • The Karnes County Courthouse in Karnes City. | Photo: Mick Watson
  • Malcolm X—Ella Little-Collins House | Photo by Steve Dunwell
  • La Jolla, CA Post Office
  • Ellis Island was known as an “Island of Hope” for immigrants. | Photo: Clara Daly/
  • Success! Chimney Rock designated a National Monument. | Photo: Mark Roper, U.S. Forest Service
  • The Haas-Lilienthal House is an exuberant 1886 Queen Anne-style Victorian. | Photo: Jeff Scott
  • The Washington National Cathedral was completed over the course of 83 years. | Photo: National Trust
  • Nantucket Lightship is the largest U.S. lightship ever built. | Photo: Matt Teuten
  • Terminal Island played a vital role during WWI and WWII. | Photo: Los Angeles Harbor Department
  • White Grass is one of America's last, great pioneer dude ranches. | Photo: National Trust
  • Stoneman Bridge | Photo by Lee Rentz
  • Prentice Women’s Hospital opened to international acclaim in 1975. | Photo: Landmarks Illinois