Flanagan South

Jenna Dooley / WNIJ

A 600-mile oil pipeline is nearing completion in Illinois. When it's done, the Flanagan South project from Canada-based Enbridge is expected to carry 600,000 barrels of crude oil per day. It crosses several states, starting near Pontiac, Illinois to a hub in Cushing, Oklahoma.

Construction began in August of 2013. Enbridge spokeswoman Katie Lange says the pipeline should be in service by the summer.

Jenna Dooley / WNIJ

We wrap-up our series on "Flowing Fuels" with a look at who is responsible for inspecting pipelines in Illinois. 

In August, a fuel pipeline in Erie, Ill., exploded under a cornfield, sending flames hundreds of feet into the air. Dozens of people were evacuated. The pipeline was carrying a mix of ethane and propane. The blast is still under investigation and raises questions about who monitors pipelines that flow just beneath the surface.

The short answer: it depends.