High Quality Content by WIKIPEDIA articles! Wan Mat Saman Aqueduct or Terusan Wan Mat Saman is the longest aqueduct in Malaysia. The total length is 31 km, connecting Sungai Kedah at Alor Star to Gurun in the south of Kedah. It was built between 1900 and 1909 at the order of Menteri Besar of Kedah at the time, Wan Mat Saman. The structure enables Kedah to boost its rice production and through it, enables Kedah to earn the nickname "Malaysia`s rice bowl".