Public procurement for Geophysical survey

The objective of this study is to enhance the understanding of the geological characteristics of the Offshore Wind Farm areas by collecting and analysing geophysical data and developing a Ground Model to determine the design and installation requirements for the Offshore Wind Farm.

The geophysical survey shall identify all seabed features, including natural objects such as boulders and non-natural objects e.g. wrecks, debris, existing cables, pipelines, and Unexploded Ordnances. The seismic data shall be used to identify potential shallow geohazards that could impact the safe placement of wind turbines in the survey area, and to describe the key horizons of the geological formation of the site.

The collected and interpreted geophysical data shall be used to develop a preliminary ground model which shall be provided together with the recommendations for the geotechnical program to the separately procured geotechnical survey contractor, who will use it to conduct the geotechnical sampling and testing program. The results of the geotechnical program, combined with the geophysical data, shall be used to create an Integrated Ground Model, which shall serve as the basis for the design of offshore foundations, structures, and cable burial, supporting the safe and efficient installation of the Offshore Wind Farm.

This study consists of 3 work packages:

1. Geophysical survey of the OWF sites (WP1) – to provide a high-quality geophysical dataset for Estonian and Latvian ELWIND OWF sites
2. Preliminary Ground Model (WP2) – Data acquired in the geophysical survey (WP1) are to be interpreted for the input to a coherent Preliminary Ground Model
3. Integrated Ground Model (WP3) – Following the completion of the geotechnical investigation program (planned for summer 2026) and the submission of the geotechnical survey report, a comprehensive Integrated Ground Model shall be developed.

The division of the scope of work shall be completed in a logical sequence (WP1 -> WP2 -> WP3). Offshore geophysical works are to be completed within this year (2025).

The procurement is published in the Estonian Public Procurement Register with an identification code 295833 here and the tender submission date is June 27^th.