Hassan Addakhil Dam

Hassan Addakhil Dam is one of the most important modern landmarks in the Ziz Valley system. Located on the Oued Ziz north of Errachidia, it lies about 12 km from the city and forms a reservoir that interrupts the dry mountain landscape with a striking sheet of blue water. The dam supplies irrigation water to the Ziz Valley and Tafilalet farmland and protects Errachidia and the lower plain from floods. Completed in 1971 with a capacity of 347 million cubic meters, it is central to the region’s water management. For travelers, the dam is usually visited as a scenic viewpoint rather than a formal attraction. The reservoir gives visual context to the oasis corridor, showing how the waters of the Ziz are captured and regulated before feeding palm groves and cultivated lands downstream. The surrounding scenery is austere and powerful, with arid slopes dropping toward the reservoir and the road continuing into the gorge landscape. It is best reached by car or private driver, ideally as part of a half-day loop from Errachidia or a longer southbound drive. Hassan Addakhil Dam is essential for understanding the modern relationship between water, agriculture and settlement in the Ziz Valley.