Moreover, Jakarta is sinking about  each year, and up to  in the northern coastal areas. After a feasibility study, a ring dyke known as Giant Sea Wall Jakarta is under construction around Jakarta Bay to help cope with the threat from the sea. The dyke will be equipped with a pumping system and retention areas to defend against seawater and function as a toll road. The project is expected to be completed by 2025. In January 2014, the central government agreed to build two dams in Ciawi, Bogor and a  tunnel from Ciliwung River to Cisadane River to ease flooding in the city. Nowadays, a , with capacity  per second, underground water tunnel between Ciliwung River and the East Flood Canal is being worked on to ease the Ciliwung River overflows.