Colorado’s congressional delegation is at odds over how to clean up the country’s abandoned mines.

On Wednesday, Colorado Republican Rep. Doug Lamborn discussed Good Samaritan legislation he sponsored at a committee hearing on Capitol Hill. It’s part of a trio of bills that would provide incentives and make it legally feasible for private groups to clean up abandoned mines. 

California Democrat Rep. Alan Lowenthal says the approach is too narrow though.

“They’re only a start. And by themselves, I don’t believe they’re nearly enough to make a real dent in this problem,” he said. 

Meantime, Sens. Cory Gardner and Michael Bennet, along with Rep. Scott Tipton, say they’ll introduce their own version of Good Samaritan legislation. They think a standalone bill will have a better chance of passing.