The alpine farmers lead the cows every year on to the mountain pastures of the Grande Plagne. At the chalet of Plan du Salt (2,250 m), the milk of the tarentaise and abondance cows (the only breeds authorised under the Beaufort PDO) is transformed into Beaufort d´Alpage over 100 days. The weak spot of this mountain pasture is the water resource. During periods of drought, the alpine farmer must obtain supplies downstream from the Refuge de la Glière, and pay for a number of trips to take up one tonne of water to the chalet.