Pennsylvania was the site of the deadliest nuclear accident in U.S. history. In 1979, a partial meltdown occurred at the Three Mile Island nuclear power plant in Harrisburg, Pennsylvania.
Clarion County, Pennsylvania, located in the northwestern part of the state, has a rich history dating back to its founding in 1839. The area was initially home to Native American tribes, including the Seneca and Iroquois nations, who lived off the land and utilized the region's natural resources. In the 18th century, European settlers began moving into the area, establishing small farming communities.

The county's development accelerated with the discovery of oil in the late 19th century. The Clarion Oil Field, one of the largest in the state, attracted numerous oil companies and workers to the region, leading to a booming oil industry. This newfound wealth and economic growth transformed Clarion County into a thriving industrial center, with bustling towns and a vibrant oil industry.

As the oil industry declined in the early 20th century, Clarion County saw a shift in its economic focus towards manufacturing and agriculture. Several factories were established, producing goods such as glass, steel, and textiles. Agriculture also played an important role, with farmers producing crops such as corn, wheat, and dairy products.

Today, Clarion County embraces its rich history while looking toward the future. The county is known for its natural beauty, with abundant forests, parks, and the Clarion River, attracting outdoor enthusiasts. Additionally, Clarion University, founded in 1867, provides educational opportunities for students and contributes to the cultural and intellectual life of the community. Clarion County continues to evolve and adapt, combining its historical heritage with a focus on economic diversification, tourism, and preserving its natural resources for future generations.

This timeline provides a condensed summary of the historical journey of Clarion County, Pennsylvania.

  • March 11, 1839: Clarion County is established from parts of Venango and Armstrong counties
  • 1851: The first courthouse is built in Clarion
  • 1867: The discovery of oil leads to an oil boom in the county
  • 1871: The Clarion River is designated as a Wild and Scenic River
  • 1909: The first automobile bridge is built over the Clarion River
  • 1923: Clarion County's first airport, Clarion County Airport, is established
  • 1931: Piney Dam is completed on the Clarion River
  • 1953: The Clarion River is designated a State Scenic River
  • 1979: Clarion University of Pennsylvania is established
  • 2009: Cook Forest State Park, located partly in Clarion County, is designated an International Dark Sky Park