Hanford Reach National Monument


Hanford Reach National Monument
Hare HanfordReach.jpg
Map showing the location of Hanford Reach National Monument
Map showing the location of Hanford Reach National Monument
Map showing the location of Hanford Reach National Monument
Map showing the location of Hanford Reach National Monument
LocationBenton / Grant / Franklin / Adams counties, Washington, USA
Nearest cityRichland, WA
Coordinates46°35′00″N 119°31′00″W / 46.58333°N 119.51667°W / 46.58333; -119.51667
Area194,451 acres (78,692 ha) [1]
CreatedJune 8, 2000
Governing bodyU.S. Fish and Wildlife Service U.S. Department of Energy
WebsiteHanford Reach National Monument
Wildflowers at HRNM

The Hanford Reach National Monument is a national monument in the U.S. state of Washington. It was created in 2000, mostly from the former security buffer surrounding the Hanford Nuclear Reservation (Hanford Site). The area has been untouched by development or agriculture since 1943. Because of that it is considered an involuntary park.

The monument is named after the Hanford Reach, the last non-tidal, free-flowing section of the Columbia River in the United States, and is one of eight National Monuments administered by the U. S. Fish and Wildlife Service; part of the monument within the Hanford Site is also managed by the Department of Energy. President Bill Clinton established the monument by presidential decree in 2000. In May 2017, the Interior Department announced that Hanford Reach was one of 27 National Monuments under review for possible rescinding of their designation.[2]

Ancestors of the Wanapum People, Yakama Nation, Confederated Tribes of the Colville, Confederated Tribes of the Umatilla Reservation and the Nez Perce used the land for hunting and resource collecting.

Geographically, the area is part of the Columbia River Plateau, formed by basalt lava flows and water erosion. The shrub-steppe landscape is harsh and dry, receiving between 5 and 10 inches (250 mm) of rain per year. The sagebrush-bitterbrush-bunchgrass lands are home to a wide variety of plants and animals, and the Hanford Reach provides one of the Northwest's best salmon spawning grounds. Forty-eight rare, threatened, or endangered animal species have found refuge on the monument, as well as several insect species found nowhere else in the world.[3]

Fish and wildlife

There are two main habitats in the Hanford Reach National Monument: desert and river.

Islands, riffles, gravel bars, oxbow ponds and backwater sloughs provide support to forty-three species of fish. Large numbers of fall Chinook salmon spawn in the Hanford reach. Federally threatened species such as the Upper Columbia River Spring Chinook, the Middle Columbia River Steelhead and the Upper Columbia River Steelhead use the reach for migration purposes.[4]

The refuge is famous for the elk located on the Arid Lands Ecology Area. Herd numbers vary by time of year with 150 seen during the spring/summer and 350 to 375 during the fall. The elk population reaches its peak in the winter with an average of 670. Archaeologists believed the elk had been in the region for the last 10,000 years. During the mid-19th century, first hand accounts mentioned the disappearance of the species. Rocky Mountain elk were reintroduced into the region during the 1930s,[5] as well as a natural recolonization event from the nearby cascade mountains during the difficult 1978 winter.

The dry, desert region is home to forty-two mammal species. Mice are the most abundant and include the deer mouse, western harvest mouse, northern grasshopper mouse. Mammals that inhabit this refuge include coyotes, skunks, beavers, mule deer, bobcats, river otters, minks, cougars and badgers.

Hanford Nuclear Reservation

Hanford Reach is home to nine nuclear reactors of which B Reactor is the most famous; constructed in 13 months during World War II, it was the world's first full scale reactor. Plutonium from the reactor was used in the first nuclear explosion at the Alamogordo Bombing and Gunnery Range in New Mexico (July 16, 1945) and in the Fat Man atomic bomb dropped on Nagasaki, Japan (August 9, 1945). The reactor's significance has led to many distinctions including a place on the National Historic Mechanical Engineering Landmark, National Register of Historic Places, Nuclear Historic Landmark, National Civil Engineering Landmark and National Historic Landmark.


Map of Hanford Reach National Monument

The monument is open from two hours before sunrise to two hours after sunset; some areas are open to the public and others are not:

Several sites in the adjacent Hanford Site including the B Reactor are part of the Manhattan Project National Historical Park and are accessible on public tours.


  1. ^ "Annual Report of Lands as of September 30, 2009" (PDF). United States Fish and Wildlife Service.
  2. ^ Dept. of Interior press release
  3. ^ "US Fish and Wildlife Hanford Reach National Monument". August 18, 2009. Retrieved August 18, 2009.
  4. ^ "U.S. Fish & Wildlife Service: Hanford Reach Wildlife & Habitat". fws.gov. U.S. Fish and Wildlife Service. Retrieved 2016-07-23.
  5. ^ "US Fish and Wildlife Hanford Reach National Monument Elk". August 18, 2009. Retrieved August 18, 2009.

External links

  • Fws.gov: Official Hanford Reach National Monument website
  • Landsat image overlaid with map
  • White House Press Release
  • Washington State precipitation map
  • Pacific Northwest National Laboratory resource cards