According to Carey Sublette, the design of the Sedan device was similar to that used in Shot Bluestone and Swanee of operation Dominic conducted days and months prior to Sedan respectively, and was therefore not unlike the W56 high yield Minuteman I missile warhead. If you've got Google Earth you can find it, just type in Sedan Crater, it'll take you there then back out to see the rest of the area. Look at that flipping picture, I mean serrrrriously. Media members seeking a tour of the NNSS should contact the Office of Public Affairs at (702) 295-3521. Truly, a place that needs zero introduction. U.S. National Register of Historic Places. Groups, civic or technical organizations, and private clubs may request specially arranged tours – minimum of 25 people – by calling (702) 295-0944. Yes! Public tours are conducted only four times a year, with specific dates determined a few months in advance. Sedan Crater. It's the first site at the NTS to be listed in the National Register of Historic Places. The size of the tour group is limited, so there is a waiting list.  Taking a Tour of the Sedan Crater. This shallow underground test displaced millions of tons of earth and left the largest explosion crater in the NTS, 1280 feet (almost 400 m) across and 320 feet (100 m deep). The crater was listed on the National Register of Historic Places on March 21, 1994. The Nevada Field Office (NFO) provides free general interest tours of the NNSS on a monthly basis. If you want to take the tour, the first step is to call the Office of Public Affairs to get your name on the waiting list for the tour. The National Nuclear Security Administration’s Nevada Field Office provides free general interest tours of the Nevada National Security Site on a monthly basis. 1-10 of 24 replies Sorted by « 1 2 3 » Browse forums; All. You can take a tour of the Sedan Crater and the rest of the Nevada National Security Site. Today, the Sedan crater, located in the Nevada Test Site, offers free monthly tours hosted by the U.S. Department of Energy, and sees over 10,000 visitors a year. The biggest and most famous of these shots created the "Sedan" crater in the north of Yucca Flat. Sedan Crater Sedan Crater—Nevada National Security Site. The Sedan crater. Sedan Crater is the result of the Sedan nuclear test and is located within the Nevada Test Site, 12 miles (19 km) southwest of Groom Lake, Nevada (Area 51). Start getting excited about seeing this babe on the Nevada National Test Site tour, because Sedan is one of the stops that will have you understanding the raw force of the testing out there. It offers a spectacular view of the destruction created from a nuclear explosion. The Sedan Crater Sedan was a thermonuclear device with a fission yield less than 30% and a fusion yield about 70%. Report inappropriate content . During the special tours, guests are able to walk into an observation platform that sticks out over the rim of the crater. Looks like the surface of the Moon!