The Tabbowa Wewa is an ancient irrigation system in the Mee Oya basin, constructed by damming the Nanneri Oya, a major tributary of the Mee Oya , for irrigation purposes. The reservoir was restored between 1913-1925 and then again in 1969. It's by the Putlam Anuradapura Tricomalee Highway just before the karuwalagaswewa Junction.