The objective of Frisco 2.1 project is implementation of a structural flood risk reduction measure – the modernization and upgrading of the Vonarje Dam, which is a key structural flood risk reduction element in the Sotla river basin. The project is implemented by partners from Slovenia and Croatia.

Cooperation program INTERREG V-A Slovenia-Croatia presents the main frame for the cross-border cooperation between Slovenia and Croatia in the financial perspective 2014-2020. The purpose of cross-border cooperation is to solve common challenges that we have jointly identified in the border area, while taking advantage of the untapped potential for growth and strengthening of the cooperation to achieve overall harmonious development of the European Union.

Frisco 2.1 was approved on 28th November 2017 at the 5th meeting of the Monitoring Committee under the 1st Priority Axis of the Cooperation Program – Integrated flood risk management in transboundary river basins. The project is implemented by partners from Slovenia and Croatia within the framework of Cross-border Cooperation Program INTERREG V-A Slovenia-Croatia for the period 2014-2020. Slovenian Water Agency (DRSV) is the leading partner responsible for the management and implementation of the project. It’s an organization within the Ministry of the Environment and Spatial Planning and manages expert, administrative and development tasks in the field of water management in accordance with the regulations on governing waters at the state level. Project partners from the Republic of Croatia are Croatian Waters (HV).

Project information leaflet & brochure

Detailed information about the project (sources and amount of co-financing, types of activities, results, partners) are available in the project information leaflet and brochure.


The total value of the project is 1.678.525,00€, of which 85% is partially financed by the European Union from the European Regional Development Fund (ERDF) under objective of the European Territorial Cooperation INTERREG V-A Slovenia-Croatia for the period 2014-2020, while 15% of the investments are funded by the project partners. The project on the Vonarje dam coincides with the operational programs of cohesion policy in Slovenia and Croatia.


The purpose of the Frisco 2.1 project is to modernize and upgrade the Vonarje dam to ensure the retention of the Sotla high waves and thus to protect downstream settlements from flooding.

The project aims at building measures – the modernization and upgrading of the Vonarje dam in the border area of the Sotla River, which plays an important role in reducing flood risk and improving the flood risk management systems in the area.

Basic information

  • 2 partners from Slovenia and Croatia
  • Duration of the project: 24 months
    • Start: 1st December 2017
    • Finish: 30 November 2019
  • Financing through the INTERREG V-A Cooperation Program Slovenia-Croatia 2014-2020
  • Total budget: 1.678.525,00 €; 85% ERDF, 15% partners’ funds
  • Area: border area of the Sotla River