The wholesale price of electricity is very low right now due to the abundance of natural gas. The subsidies being applied to wind are also keeping it's cost artificially low. These plants are now merchant plants which is a completly different financial world than existed when they were built.
Quad Cities is an older station that's going to need extensive retrofitting to continue long term operations. It's been on the short list of plants to be shut down for quite a while. Clinton is a single unit facility. The support organization for a single unit plant isn't much smaller than that required for a multiple unit site so the cost per MWe is higher there than at the dual unit sites with similar output per unit (LaSalle, Byron, Braidwood).
