Al-Khanq Dam, also known as the Dam of Muawiya ibn Abi Sufyan, is a significant example of early Islamic dam engineering. Located in Wadi al-Khanq, east of Madinah and south of the village of al-Aqool, the dam stretches about 30 meters in length and rises roughly 20 meters from the valley floor to the surrounding terrain.

Over the centuries, the dam’s middle section has collapsed due to earthquakes and severe floods passing through the narrow valley. Nearby, there is a second dam—longer but lower in height—constructed to capture overflow floodwaters from the first dam’s reservoir. This secondary dam has also suffered similar collapse in its middle section.