Period Total Cost Generation Capacity Generation Type Annual Power Generation Spring Tide Range Area Seawall length Generator Participants Classification - Municipal Office in charge: Incheon, Ganghwa County - Company: Korea Midland Power Co. Ltd - Construction: Daewoo E&C Consortium 2007-2017 2.352 Trillion Won 840 MW Ebb generation 1,556 GWh 8.97 m 79.4km2 8.4km 30 MW X 28 Ea 2005-2017 3.4 Trillion Won 1,440 MW Ebb generation 2,676 GWh 7.20 m 196km2 20.9km 30 MW X 48 Ea Ganghwa - Ministry of Land, Transport & Maritime Affairs - Korea Hydro & Nuclear Power Co. Ltd. - GS E&C Incheon Bay