Such is the number and quality of features of industrial archaeology on the site, that in 2001 it was made possible to visit the hydroelectric power station. Over the years, further points of interest have been added, such as the forge and the intakes, and in May 2006 the Emili Riu rooms were opened, which now house the permanent exhibition.
The permanent exhibition reveals the historical circumstances that motivated the construction of a hydroelectric power station in a Pyrenean valley so remote from large conurbations. Our valley's large reserve of water, almost 50 million cubic metres, , prompted Emili Riu, a politician and visionary businessman, to undertake the first project to take advantage of some of the 28 lakes in the headwaters of the Flamisell. That was in 1904. The need for an alternative source of energy, to break with the country's dependence on Welsh coal, justified the project, and it went ahead with French and Swiss capital. The project consisted of building two underground channels to bring the water to a holding pond, from which it travels 5 km down a channel to the water chamber, from where it plunges 836 metres down to the generating station. For many years Capdella held the Spanish and European records for the greatest head of water.
To back up the permanent exhibition, the guides offer a presentation with abundant photographic resources that takes you on a journey from a rural Vall Fosca to the industrial valley, without losing sight of the historical context of Catalonia at the start of the 20th century. Several interactive resources reveal the transformations the valley has undergone, such as the disappearance of traditional crafts in the face of the arrival of industry.
Penstocks, collectors, turbines, alternators, control panel, transformer and forge: these conclude an outdoor tour which carefully explains to visitors how a hydroelectric power station works, and how the electricity is transported and distributed to individual homes.
The Capdella hydroelectric power station was the first large such installation in Catalonia, since that was the first time electricity was transported over 200 km from the site of generation.
The power station, which still works at full capacity to this day, was automated in the 1980s, but two units are maintained as they were set up in 1914.
After generating electricity in the Capdella power station, the water continues through channels and pipes to fourteen further generating facilities before reaching the sea.

The museum is a homage to the 4,000 anonymous people who carried out gargantuan civil engineering in just 27 months, between November 1911 and January 1914, putting this little Pyrenean valley at the heart of the process of electrifying Catalonia.