A dam was built on the Bin-el-Ouidane River, forming a 3,755 ha reservoir that brightens up the surrounding mountainous terrain. This impressive piece of engineering, 1,330m tall and 285m long at the top, produces electricity and irrigates the Tadla Plains. The (R 306) road affords great views of the dam and the calm and amazingly blue waters of the lake. It eventually leads to Ouzoud Falls, then the gorge carved out by the El Abid River.