The £435m plant is run as Seabank Power Ltd. It is equally owned by BG Group (former part of British Gas) and Scottish and Southern Energy (SSE). It was built by Siemens and initially opened in 2000. It was built in two parts, with Seabank 1 (755MW) started in January 1996 and completed in March 2000. Seabank 2 (385MW) was started in January 1999 and was completed in January 2001. It connects to the National Grid, via a transformer, at 400kV. It provides enough electricity for the whole of Bristol.
Seabank is a CCGT type power station that runs on natural gas. The section first built consists of two Siemens V94.3A (now called SGT5-4000F gas turbines with two heat recovery steam generators (HRSG) and a steam turbine. The next built section consists of one V94.3A gas turbine, an HRSG and one steam turbine. It has a 55% thermal efficiency. The HRSGs were built by Standard Fasel Lentjes (known as SFL and now owned by NEM) and Stork Power Services, both Dutch companies.