The second-largest fossil plant in SCE&G's system generates 650 megawatts of electricity by burning pulverized coal in a single unit. At full load, Williams Station can produce enough power in one hour to supply the average electric needs of 650 residential customers for one month. It can also generate 50 megawatts of electricity from two natural gas combustion turbines.
- Selective catalytic reduction (SCR) equipment was installed in 2004 to reduce nitrous oxide gases (NOx). The total cost was more than $65 million and has reduced NOx emissions by more than 70 percent.
- A scrubber was installed in 2009 to reduce sulfur dioxide (SO2) emissions. At a cost of more than $170 million, the scrubber will eliminate more than 95 percent of SO2. A co-benefit is that approximately 60-90 percent of mercury emissions will be eliminated.
- The plant is equipped with electrostatic precipitators that remove 99 percent of fly ash from the combustion process. The boiler also has low-NOx burners, installed in 1998, that reduce the amount of nitrous oxide gases even further.
- A $9 million barge offloading and coal conveying facility is currently under construction at the site that will allow the plant to diversify its fuel options. The new facility will allow the plant to greatly increase its import of low-sulfur coal via ship and barge from anywhere in the world.
- Located near Charleston, S.C.
- Generates 605 megawatts of electricity.
- Began commercial operation in 1973.
- Burns approximately 230 tons of coal per hour when operating at full load.
- Pays approximately $2.8 million in property taxes annually.
- Employs 82 employees.