The document discusses the Marina Barrage project in Singapore. The Marina Barrage was built across the mouth of the Marina Channel, creating Singapore's 15th and largest reservoir in the heart of the city. It helps control flooding, provides a new water source, and has become a lifestyle attraction for recreational activities. The barrage was envisioned by Minister Mentor Lee Kuan Yew nearly two decades ago and turns the Marina Bay and Kallang Basin into a freshwater reservoir unaffected by tides.