330 kV Power Transmission Line Riga CHP-2 - Riga HPP

The project 330 kV Power Transmission Line Riga CHP-2 - Riga HPP is included in the Latvian power transmission system development plan as well as the European ENTSO-E ten year development plan. The network reinforcement must be commissioned by 2020, when the Estonia-Latvia third interconnection is expected to be commissioned, because the Riga CHP-2 - Riga HPP project is the reinforcement of the internal network of Latvia to ensure full functionality of the Estonia-Latvia third interconnection not only under regular, but especially under emergency and repair modes. On a regional scale, this network reinforcement will play a substantial role in increasing the transfer capacity in the Baltic region in the North - South direction.


Project events


This year Latvian Transfer system operator JSC Augstsprieguma tīkls (AST) will invest 95 million euros in…


On 27 August, the Latvian transmission system operator AS Augstsprieguma tikls (AST) signed a contract with SIA…

Work progress plan

It is expected to complete the project 330 kV Power Transmission Line Riga CHP-2 - Riga HPP in 2020. On 17 February 2017, a decision was made regarding granting European Union co-funding to the project in the amount of 50%, or EUR 9.9 million, from the funds of the  Connecting Europe Facility.

By the decision of the Cabinet of Ministers, on 16 August 2017 the project was granted the status of an object of national interest. The ordinance regarding granting the status of an object of national interest is the way the State implements its political determination in relation to national development in the energy sector and performance of international obligations assumed.

This network reinforcement will provide the Estonian-Latvian third interconnection with full functionality during repairs and outages in the power transmission network in Riga Region, and will also provide for the Riga CHP-2 emergency start-up option from the Riga hydro power plant. In addition to the criteria discussed above, the Riga CHP-2 - Riga HPP project will provide sufficient infrastructure for energy independence of the Baltic countries from the unified energy system of Russia and it serves as a prerequisite for successful synchronisation of power systems of the Baltic countries with power systems of continental Europe.

The Riga CHP-2 – Riga HPP project has been included under No. 4.2.3 in the list of Projects of Common Interest (PCI), which has been developed based on Regulation of the European Parliament and of the Council No. 347/2013. More information about the CPI list can be found here.

The estimated length of the power transmission project is 13 km and, pursuant to Paragraph 26 of Annex 1 of the Law of the Republic of Latvia On Environmental Impact Assessment, the environmental impact assessment need not be carried out for high voltage power lines (voltage of 110 kV or more), the length of which is less than 15 km, but, pursuant to part 2 of Paragraph 3 of Annex 2 of the same Law, for the installation of high voltage power lines, the length of which exceeds 5 km, the initial assessment must be performed. On 28 August 2016, JSC Augstsprieguma tīkls submitted the application for the initial environmental assessment for the power transmission line Riga CHP-2 - Riga HPP to the State Environmental Bureau Lielrīga Regional Environmental Authority. On 26 October 2016, the State Environmental Bureau, upon evaluating the delivered information, the specified facts and considerations, adopted the resolution (No. 280) not to apply the environmental impact assessment (EIA) procedure for the activity proposed by JSC Augstsprieguma tīkls, the 330 kV power transmission line Riga CHP- 2 – Riga HPP.

A public discussion of the project took place in Salaspils Municipality Council on 24 April 2017, which was attended by owners of land affected by the project, municipality representatives and other stakeholders. Minutes of the public discussion and the list of participants may be found here.

On 27 October 2017, JSC Augstsprieguma tīkls announced the procurement procedure for designing and construction of the power transmission line Riga CHP- 2 – Riga HPP.

The plans for 2018 include entering into the agreement with the builder and starting designing of the line.

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