A conservation group will continue pushing federal authorities to tighten the regulation of muddy logging roads, despite a U.S. Supreme Court ruling that sided with the timber industry.

Paul Kampmeier, a lawyer for the Northwest Environmental Defense Council, said Wednesday the ruling gives the group latitude to pursue its lawsuit challenging the U.S. Environmental Protection Agency's latest rule on logging roads.

The Supreme Court reversed a decision by the 9th U.S. Circuit Court of Appeals that EPA should regulate water running off logging roads in the same way it regulates industrial pollution.

A timber industry group says the current EPA policy regulating logging roads with the system used for farm fields is doing a good job, and this challenge just causes disruption.