There are no Versant (or CMP) plants. The state of Maine prohibited distribution companies from owning power generators back in the 90s, under the guise of "increasing competition will lower prices for consumers". That's why Bangor Hydro ceased to own any hydro power.

The companies that own power generation in the state place public bids with the PUC to be one of the standard offer providers. The net effect is the same though - the PUC goes with the lowest cost options, and anyone else offering power is generally trying to pull one over on you one way or another. The 'supply' side of your electric bill is not kept by CMP or Versant, it goes to the companies that generate the power. And they're making a fuckin' killing off us (which is probably why they spent so much to keep hydro energy out of the New England grid, but that's a whole other discussion).