Question: Which state park is located on a site where the largest civilian exposure to dioxin in the country's history happened?

Context paragraphs:
Bewabic State Park: Bewabic State Park is a 315 acre state park located near Crystal Falls, Michigan in Iron County, Michigan on the shore of Fortune Lake.  Bewabic State Park is site #9 of the Iron County Heritage Trail System.  The park is rich with Civilian Conservation Corps (CCC) history as evidenced by the CCC structures still in use.  The park is unique in that it is the only state park in Michigan with tennis courts.  The park was listed on the National Register of Historic Places in 2016 for its CCC-related architecture.

Sand Bridge State Park: Sand Bridge State Park is a Pennsylvania state park on 3 acre in Lewis Township, Union County, Pennsylvania in the United States.  The park is the smallest state park in Pennsylvania and consists of a picnic area just off Pennsylvania Route 192.  It has three picnic pavilions that were built by the Civilian Conservation Corps during the Great Depression.  Rapid Run, a trout stream that is stocked by the Pennsylvania Fish and Boat Commission, flows through Sand Bridge State Park.  The park attracted 17,000 visitors in 2008.  The name Sand Bridge remains a mystery.  No one, according to the parks official website knows why the area is known as Sand Bridge.  The park is surrounded by Bald Eagle State Forest and became a Pennsylvania State park in 1978.

Route 66 State Park: Route 66 State Park is a state park in the U.S. state of Missouri, located on the former site of the town of Times Beach.  It is a 419 acre park located less than 1 mi east of Eureka.

Magnolia Springs State Park: Magnolia Springs State Park is a 1,070-acre (4.33 km²) Georgia state park located between Perkins and Millen in Jenkins County.  The park was built as a project of the Civilian Conservation Corps and opened in 1939.  The park is well known for its crystal clear springs that are estimated to flow 7 e6USgal per day.  The park also offers unique wildlife near the springs, including alligators, turtles, and a variety of birds and fish.  During the American Civil War the area that now comprises the day-use area of the park was used as a prison, and was called Camp Lawton, which is on the National Register of Historic Places.  The park still houses remnants of the earthen fort that guarded the 10,000-prisoner camp.  Two huge timbers, possibly from the prison but more likely from work done by the Civilian Conservation Corps between 1938 and 1942, were recovered from the spring run.  The park has 26 tent/RV campsite, eight fully furnished cottages with central HVAC and satellite TV a, a 16-person Group Lodge with satellite TV and screened back porch, and a new History Center that currently displays some of the first artifacts excavated by the archaeology team from Georgia Southern University.  Georgia Southern's Sociology/Anthropology Department has been conducting surveys and excavations for a number of years at the park, serving as a partner in revealing and interpreting the history of Camp Lawton.  In the summer of 2015 the park is opening a splash pad to ultimately take the place of the aging and underused swimming pool.

Kidepo Airport: Kidepo Airport (ICAO: HUKD) is an airfield in Northern Region, Uganda.  The airport is at Lomej, approximately 3 km south of the headquarters of Kidepo Valley National Park, and 456 km northeast of Entebbe International Airport, the country’s largest civilian and military airport.

Entebbe–Kampala Expressway: The Entebbe–Kampala Expressway, also known as the "Kampala–Entebbe Expressway" or the "Entebbe–Kampala Highway", is a four-lane toll highway under construction in the Central Region of Uganda.  The highway will link Entebbe International Airport, the country's largest civilian and military airport, to Kampala, the country's capital and largest metropolitan area.  Commissioning is planned for 2016.

Stillwater State Park: Stillwater State Park is a state park located on Lake Groton in Groton, Vermont.  The park is located in Groton State Forest close to the Groton Nature Center, Boulder Beach State Park and Big Deer State Park.  The park offers camping, picnicking, and access to water-related activities on Lake Groton.  The park was developed in the 1930s by crews of the Civilian Conservation Corps (CCC).  It is open to the public between Memorial Day weekend and Columbus Day weekend; fees are charged for day use and camping.

Devil's Den State Park: Devil's Den State Park is a 2500 acre Arkansas state park in Washington County, near West Fork, Arkansas in the United States.  The park was built by the Civilian Conservation Corps beginning in 1933.  Devil's Den State Park is in the Lee Creek Valley in the Boston Mountains which are the southwestern part of The Ozarks.  The park, with an 8 acre CCC built lake, is open for year-round recreation, including, hiking, mountain bike and equestrian trails.  Devil's Den State Park also has several picnic areas, a swimming pool, cabins and camping site ranging from modern to primitive.  Fossils of coral and crinoids can be found along the banks and within Lee Creek at Devil's Den State Park.

Times Beach, Missouri: Times Beach is a ghost town in St. Louis County, Missouri, United States, 17 mi southwest of St. Louis and 2 mi east of Eureka.  Once home to more than two thousand people, the town was completely evacuated early in 1983 due to a dioxin contamination that made national headlines.  It was the largest civilian exposure to dioxin in the country's history.

Parks in Greater St. Louis: Parks in Greater St. Louis are administered by a variety of state, county, and municipal authorities.  The region also is home to the Jefferson National Expansion Memorial, site of the Gateway Arch, the only National Memorial in the state of Missouri.  Among the largest municipal parks is Forest Park, which is 1293 acre and is located in the city of St. Louis, although both Greensfelder County Park and Creve Coeur Park in St. Louis County are larger, at 1646 and respectively.  St. Louis County is also the location of two large state parks, Babler State Park with 3.8 sqmi and Castlewood State Park with 2.8 sqmi .  The largest state park in the region is Meramec State Park, located near Sullivan, Missouri, with 10.8 sqmi of parkland.

Supporting paragraphs: Route 66 State Park Times Beach, Missouri
Answer: Route 66 State Park