The Pennsylvania Department of Environmental Protection has fined a gas driller more than $500,000 for three separate violations.
Chesapeake Energy Corp. agreed to pay $565,000 after state regulators found the Oklahoma City-based driller in violation of rules protecting streams and wetlands.
In one high-profile case, Chesapeake lost control of a gas well in Leroy Township, Bradford County, in April, allowing fluids from the well to enter Towanda Creek. Regulators found contaminants in the water but no lasting damage.
In Potter County, the company allowed sediment from an access road and well pad to discharge into a high-quality stream. The sediment damaged a municipal water authority's treatment filters.
A third case involved damage to a wetland.
A Chesapeake spokesman said Thursday that the company has worked hard to improve its operations.