The Marina Barrage is a dam built across the Marina Channel in Singapore that serves three purposes - it creates a new water reservoir, provides flood control, and acts as a new lifestyle attraction. Construction began in 2005 and was completed in 2008. It works by using large gates that can be opened to release water during heavy rain and low tide, and pumps to remove excess water during high tide. The barrage helps alleviate flooding, allows for recreational activities on the reservoir, and increases Singapore's water catchment area.