In 1989 a controversial decision was made to burn orimulsion - a type of fuel based on bitumen produced in Venezuela. This was considerably cheaper than regular fuel oil but more polluting to the environment.
In 1996 the power station was closed for good. Following demolition the plan is to create a 300 acre green energy park on the site. There are already solar panels in a field adjacent to the towers.
Finger's crossed the demolition goes according to plan tomorrow or there could be a few red faces.
UPDATE - for pictures of the demolition, please see here.