The West Baray is the largest man-made reservoir of the Angkor region. It is 8 by 2.2 square kilometers (5.1 by 1.4 square mile) and had a capacity of over 123 million cubic litres. The reservoir was probably begun by Suryavarman I (1002-1010) in the 11th century and later completed by Udayadityavarman II (1046-1066). It is the only baray filled with water today. In the middle of the reservoir is an island where the mid 11th century temple of West Mebon once stood.