A view of the reservoir on Hei Ling Chau. In 1956, a concrete arch dam is built to impound surface water and springs to reserve water for both domestic and agricultural consumption of the leprosarium. 喜靈洲水塘一景。1956年島上興建新的三合土拱壩，藉以儲存地面水和天然泉水，供農田灌溉和日常病院所需。