In this thread? No. But it's an unspoken assumption in Ernest's counterargument to exile in particular, as a supporter of Keystone - that development of public land for energy production is fine, but using it to alleviate the conditions in the prisons is not.
My support for Keystone XL is based primarily upon the belief that a pipeline is the least environmentally impactful way to transport crude oil that will be produced regardless of whether Keystone XL is built or not. But even so, how do you propose forcing criminals to stay in their assigned plots of land, doing a task they have no skill with and likely little inclination?