the plant was powered from the national grid and received most of its electricity from wylfa nuclear power station 15 miles away. aa was used as a base load for wylfa and saved the grid the cost of keeping a power station on standby. the power contract terminated in 2009, and the aluminium smelting operation was shut down as no new contract was negotiated. the company has announced tentative plans for a biomass plant on the site, but smelting operations have been halted and the plant mothballed until 2016.