The Vallée des Usines is the name given to part of the Durolle valley, mainly located in the commune of Thiers in the French department of Puy-de-Dôme and the Auvergne-Rhône-Alpes region. The area is known for its long industrial past, as the power of the Durolle river has been harnessed here since the Middle Ages. The middle of the 20th century saw the departure of companies to the plains of the lower town of Thiers.