In Valtellina, Terna has constructed and commissioned the “Livigno-Premadio” power line. This consists of two underground cable power lines, each around 20 km in length, between the primary cabin in Livigno and Terna’s new electrical substation located in Premadio, in the municipality of Valdidentro. The latter, built using compact gas-insulated technology, has a minimal footprint, in harmony with the surrounding mountain landscape. The project is immensely important for the area in question, as it has enabled connection to the national electricity grid for areas where high voltage previously could not reach.