There’s a new report out today from SNL Financial that tells us:

As environmental regulations continue their forward march and gas prices remain low compared to historic rates due to increased domestic supply, the number of power plants changing their primary fuel source to natural gas has increased dramatically. In 2011 and 2012, just more than 5.5 GW of power plant capacity switched to burning primarily natural gas from another form of fossil fuel, according to an SNL Energy analysis of U.S. Energy Information Administration 860 data.

You can read the whole thing, and see charts of the plants involved, here.