The other economically important area is the Ems delta with the sea ports of Delfzijl and Eemshaven. In 2015, a total of 11,589 cargo vessels arrived at the two Groningen Seaports combined, 7,111 sea vessels and 4,478 inland vessels. The ports had a cargo throughput of 11,309,000 tonnes. The chemical industry near Delfzijl is located at the Chemie Park in Farmsum, with factories of AkzoNobel, Lubrizol, and Teijin Aramid. Both GDF Suez and Vattenfall have a natural gas-fired power plant in Eemshaven, and Essent is building a coal-fired power plant there.