In addition, 'Adud al-Dawla is credited with sponsoring and patronizing other scientific projects during his time. An observatory was built by his orders in Isfahan where Azophi worked. Al-Muqaddasi also reports that he ordered the construction of a great dam between Shiraz and Istakhr in 960. The dam irrigated some 300 villages in Fars province and became known as "Band-e Amir" (Dam of the emir). Among his other major constructions was the digging of the Haffar channel, that joined the Karun river to the Shatt al-Arab river (the confluence of the Tigris and the Euphrates). The port of Khorramshahr was built on the Haffar, at its junction with the Shatt al-Arab.