The Houston Ship Channel was opened Tuesday morning to “limited barge traffic,” according to the U.S. Coast Guard. However, dozens of deep-draft ships were still awaiting movement in and out of the waterway for tankers supplying more than one-tenth of the U.S. refining capacity that has been shut since Saturday after an oil spill. Danny Perez, a spokesman for the Coast Guard-run Joint Information center, had no details on what types of barges were moving in the channel. (Reporting By Kristen Hays)