Capt. Evan Clark was patrolling the Allegheny River to help Three Rivers Waterkeeper get a better understanding of just how much of a mark that fuel spill made.

After an early morning accident, the two right lanes on Interstate 15 North in Mission Valley are blocked, Caltrans says.

Roughly 10 to 15 gallons of heating oil spilled onto Interstate 91 Thursday morning, according to Department of Energy & ...