Measure Normalized CO2 Emissions for Colorado

Hi all;

I'm having trouble describing what I want which generally means this may not be sensical. But here goes.

I'd like to get the yearly (or monthly) CO2 emissions in Colorado due to power generation.

But… I want to normalize out the coal plants that were shut down during that period. So show what the CO2 emissions would have been if every coal plant shut down during that period had instead been a CCGT while it was running.

I'm trying to determine the change in CO2 emissions except for the coal shutdowns. To find how all the other changes are effecting it. I believe there are 3 plants shut down over the last 5 years.

Does this make sense? And is there a way to do it?

thanks – dave