Calenzano – Colunga Line is a 380kV part oh/ug line with a length of 84km from Calenzano, Emilia-Romagna, Italy, to Colunga, Tuscany, Italy.

The project, which is currently under construction, is expected to be commissioned in 2021.


Calenzano – Colunga Line is a part oh/ug line that will be operated by Terna. The line will carry alternating current (AC).

Approximately $208.23m was financed by the authorities to undertake the construction works of the project.

The development of the Calenzano – Colunga Line project has been approved by the The Italian Regulatory Authority for Electricity and Gas.

Calenzano – Colunga Line project development status

The construction works on the Calenzano – Colunga Line project were commenced in 2019 and commissioning is expected in 2021.

About Terna

Terna SpA (Terna) is an electricity transmission system operator (TSO). It operates high-voltage grid and carries out transmission and dispatching of electricity, maintains transmission infrastructure, plans and constructs the grid, and operates grid development projects. The company generates electricity from photovoltaic, wind, geothermal, biomass, hydroelectric and thermoelectric sources. It also offers specialized services to third parties, which are related to systems engineering, operation and maintenance of high- and very-high voltage plants, housing of telecommunications equipment and maintenance services involving optical fiber networks.


All publicly-announced T&D Line & Substation projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects is sourced through secondary information sources such as country specific utility players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.