[6] The memorandum of understanding to establish a joint interconnection operator was signed between Lietuvos Energija and Polish PSE in Vilnius on 8 December 2006.

[8] Aiming to build a 400 kV overhead line between Ełk and Łomża, PSE signed a contract with the Polish construction company PBE ELBUD Group on 12 September 2011.

[9] In early 2013, the Lithuanian transmission system operator Litgrid awarded ABB Group a $110 million contract to supply and install the first HVDC converter station in proximity of Alytus, Lithuania.

[11] LitPol electricity link started operations on 9 December 2015 the same day transmitting up to 200 MW power from Poland to Lithuania.

[citation needed] Between 2015 and 2025, the line was connected to the HVDC back-to-back converter station, located in the Alytus, 600 metres (2,000 ft) southwest of the existing 330 kV-substation.