Throughout the centuries, what was distinctive about the area was its natural lake, which dried out during the 1970s. This turn of events determined the future of the city in a significant way. Laguna de Duero went through a period of growth and expansion, including the creation of the Torrelago district, which is the focus of the CITyFiED project activities.
The Torrelago district was built in two phases, each one involving a district heating network and the following numbers of buildings and dwellings:
- Phase I: 12 buildings of 12 floors, with 4 apartments per floor, for a total of 576 dwellings with an average area of 100 m2per dwelling. These buildings were constructed in 1977.
- Phase II: 19 buildings of 12 floors, with 4 apartments per floor, for a total of 912 dwellings with an average area of 100 m2per dwelling. Eleven buildings were constructed in 1979; the remaining eight were constructed in 1981.
Nowadays, this metropolitan area is established under the spatial planning directive of Valladolid and its surroundings, as all municipalities in the region have similar urban characteristics and mobility problems. A total of 416,000 residents live across a total area of about 1,000 km2.