Question: The Vernita Bridge is a bridge in the Hanford Reach National Monument near which mostly decommissioned nuclear production complex , on Washington State Route 24 over the Columbia River?

Documents:
source: Hanford Site
text: Hanford Site The Hanford Site is a mostly decommissioned nuclear production complex operated by the United States federal government on the Columbia River in the U.S. state of Washington. The site has been known by many names, including: Hanford Project, Hanford Works, Hanford Engineer Works and Hanford Nuclear Reservation. Established in 1943 as part of the Manhattan Project in Hanford, south-central Washington, the site was home to the B Reactor, the first full-scale plutonium production reactor in the world. Plutonium manufactured at the site was used in the first nuclear bomb, tested at the Trinity site, and in Fat Man, the bomb detonated over Nagasaki, Japan.

source: Vernita Bridge
text: Vernita Bridge The Vernita Bridge is a bridge on Washington State Route 24 over the Columbia River between Grant County and Benton County, located approximately 10 mi south of Desert Aire and Mattawa, Washington. The bridge is in the Hanford Reach National Monument near the Hanford Site.

source: Yakima Ridge
text: Yakima Ridge Yakima Ridge is a long anticline mountain ridge in Yakima County and Benton County in the U.S. state of Washington. From its western end just north of the city of Yakima, the ridge runs east-southeast through the Yakima Training Center to its eastern end at Hanford Reach National Monument and the Hanford Site. Yakima Ridge is paralled on the north by Umtanum Ridge and on the south by the Rattlesnake Hills. Moxee Valley and Black Rock Valley lie south of Yakima Ridge.

source: Columbia River Bridge (Bridgeport, Washington)
text: Columbia River Bridge (Bridgeport, Washington) The Columbia River Bridge, also known as the Bridgeport Bridge, at Bridgeport, Washington was built to span the Columbia River in 1950. Composed of three spans, the bridge is a steel continuous riveted deck truss carrying Washington State Route 17 on a 26 ft wide roadway and two 3 ft sidewalks. The center portion of the bridge spans 300 ft , flanked by 250 ft end spans. The 70 ft north approach span and the 100 ft south approach span are supported by steel plate girders. The bridge played a significant role in the construction of the Chief Joseph Dam just upstream, as no bridge crossing had previously existed in the area. Construction on the dam started in 1945 and was completed, apart from the powerplant, in 1955. The bridge was designed and built by the U.S. Army Corps of Engineers as part of the Chief Joseph dam project, and is significant for its association with the project and as a major crossing of the Columbia.

source: Umtanum Ridge
text: Umtanum Ridge Umtanum Ridge is a long anticline mountain ridge in Yakima County and Kittitas County in the U.S. state of Washington. It runs for approximately 55 miles east-southeast from the Cascade Range, through the Yakima Training Center to the edge of the Columbia River at Priest Rapids Dam and Hanford Reach. The eastern end of Umtanum Ridge enters Hanford Reach National Monument and the Hanford Site. Umtanum Ridge is paralleled on the north by Manastash Ridge and on the south by Yakima Ridge. The Yakima River cuts through the ridge at the Umtanum Ridge Water Gap.

source: Eriogonum codium
text: Eriogonum codium Eriogonum codium is a species of wild buckwheat known by the common names basalt desert buckwheat and Umtanum Desert wild buckwheat. It is endemic to Washington in the United States, where it is known only from Hanford Reach National Monument in Benton County. It was discovered in 1995 during an inventory of the biodiversity of the monument and described to science in 1997.

source: Hanford Reach National Monument
text: Hanford Reach National Monument 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.

source: Rattlesnake Mountain, Benton County, Washington
text: Rattlesnake Mountain, Benton County, Washington Rattlesnake Mountain (Native American name Lalíik meaning "land above the water") is a 3,527 ft (1,060 m) windswept treeless sub-alpine ridge overlooking the Hanford nuclear site. Parts of the western slope are privately owned ranchland, while the eastern slope is under the federal protection of the Arid Lands Ecology Reserve, a unit of the Hanford Reach National Monument, managed by the United States Fish and Wildlife Service.

source: Hanford Reach Interpretive Center
text: Hanford Reach Interpretive Center The Hanford Reach Interpretive Center, also known as The Reach Museum, is a museum and visitor center for Hanford Reach National Monument located in Richland, Washington. The center tells a story of the cultural, natural, and scientific history of the Hanford Reach and Columbia Basin area, as well as promoting tourism.

source: Washington State Route 24
text: Washington State Route 24 State Route 24 (SR 24) is a 79.23 mi long state highway in the U.S. state of Washington. Beginning at an interchange with Interstate 82 (I-82) in Yakima, the highway travels east into the Yakima highlands before turning north at the Hanford Site to cross the Columbia River on the Vernita Bridge. From the crossing, the highway travels east through the Hanford Reach National Monument and turns north to end at SR 26 in Othello. The highway was known as Secondary State Highway 11A (SSH 11A) from 1937 to 1964 and was originally routed through the Hanford Site until the 1940s. The Vernita Bridge was completed in 1965 along with the route to Othello north of the Hanford Reach and paved in the 1970s.

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Answer: Hanford Site