The mayor of Ellport Borough in Lawrence County said vandals caused nearly $100,000 in damage at an area park and water treatment plant.
Investigators said the vandals struck sometime on Saturday.
Major Joe Cisco said nothing was stolen.
"There's no reason for this kind of activity here," Cisco said.
Cisco said the vandals destroyed the picnic area of a park on the Third Street Extension. Signs and tables were flipped over and trash was thrown throughout the area.
The Ellsport Wastewater Treatment Plant was also hit. Cisco said the vandals used a sledgehammer to break through a gate to the facility.
The manager of the plant said wheel barrel was thrown in the main sludge collector.
"It got trapped in the chain and broke all the chains in the collector," said manager Tom Lockrouid.
no surveillance cameras were in the area, so it will be hard to find out who the culprits are.
Police continue to investigate.