Writing and Reading

Although there were once gold and iron mining operations in some Virginia Piedmont parks, those operations have since closed down.

Whereas there were once gold and iron mining operations in some Virginia Piedmont parks, the parks' mining operations for gold and iron have since closed down.

The operations in the parks have since closed down, and at one time there were once gold and iron mining operations in some Virginia Piedmont parks.

There were once gold and iron mining operations, but they have since closed down in some Virginia Piedmont parks.