https://en.wikipedia.org/wiki/List_of_coal-fired_power_stations_in_the_United_States
I should have researched before posting.
Thank you
From Wiki:
Coal plants have been closing at a fast rate since 2010 (290 plants have closed from 2010 to May 2019; this was 40% of the US’s coal generating capacity) due to competition from other generating sources, primarily cheaper and cleaner natural gas, (a result of the fracking boom) which has replaced so many coal plants that natural gas now accounts for 40% of the US’s total electricity generation, as well as the decrease in the cost of renewables.[1]