 His paying pond has a total surface of 135 km2.Flowing initially in the direction of the southeast, she turns then due south, passing between Peumerit and Plonéour-Lanvern on the West and Tréméoc in the East.His course (its average flow, measured to Trémillec, is then 504 liters of water per second) is then blocked by a dike (the concrete dam, built in 1976-1977, is 140 meters in length and is 6,8 meters high) which gives birth to a pond, the "Stretch of water of the New Mill", fed also by the brooks of Lanvern(Who the average debit flow, measured to Ty-Poës, is 165 liters of water per second); this stretch of water, managed by the Association of local authorities of the Country Bigouden headdress the South, has a surface of 55 ha and is situated in 13 meters in height; he has a storage capacity of a million of m3 of water and serves as drinking water tank for a large part of the Country Bigouden headdress; the intake of water of Pen Enez feeds the water treatment plant of Bringall.