Published: May 07, 2010 5:52 PM EDT

NASHVILLE, Tenn. - The main railroad line between Nashville and Memphis is out after two bridges washed away in weekend flooding.

Gary Sease, a spokesman for CSX Transportation said from the company's headquarters in Jacksonville, Fla., both bridges are over the Harpeth River at Nashville's west edge.

Cease said it could take 4-6 weeks to rebuild them. In the meantime, rail shipments are being rerouted back to major CXS junctions in Nashville and Memphis, using connecting carrier's tracks. He said shipments are slowly returning to normal.

The railroad also lost use of its Radnor Yard until Tuesday. Sease said with five main lines coming into Nashville, it's a busy junction.