In relation to the tendering of North Sea I, Kriegers Flak II, Kattegat and Hesselø OWFs, a range of preliminary investigations and environmental assessments are being carried out.
Results regarding the Danish Energy Islands
The results from the completed investigations (data and reports) can be accessed directly here on this website (reports) and through access to a data platform, which is maintained by Energinet (Danish TSO). All results from the preliminary investigations are targeted potential bidders.
Energinets Azure Data Solution is now open. Follow the description below to gain access.
Access to the data platform
- The data platform for North Sea I, Kriegers Flak II, Kattegat and the new Hesselø site is available at Energinets Azure Data Solution
Please follow the guideline provided in the link for access to the data material. - Preliminary investigations conducted by Energinet for Thor Offshore Wind Farm and the former Hesselø site is also available at the site.
Catalog
The list is continuously updated with an indication of when each report and dataset is expected to be published. The Danish Energy Agency will upload the reports on this webpage as soon as possible when they are finalised.
Explanatory notes for preliminary investigations and environmental assessments for Nordsøen I
Change log - North Sea I OWFs - Updated 2025-02-12
| ID | Delivery | Date |
|---|---|---|
| 4000 | North Sea I – Offshore wind farm(s) | |
| 4100 | Metocean | |
| 4101 | Measurement Plan (Updated January 2024) | Published |
| 4102 | Measurements (data) | Published (See Azure) |
| 4103 | Measurement Reports | Published |
| 4104 | Published | |
| 4105 | Site Wind Conditions Assessment Report | Published |
| 4106 | Statement of feasibility from Certification Body | Published |
| 4108 | Reverification note for Site Wind Conditions Assessment Report | Published |
| 4200 | Environmental assessments and permits | |
| 4201 | Afgrænsningsudtalelse for miljøvurdering af plan for North Sea I (Scoping of Strategic environmental assessment (SEA) for North Sea I, in Danish) |
Published |
| 4202 | Scoping of environmental impact assessment (EIA) of the concessionaire’s [1 GW] land-based project for North Sea I, North to POC Idomlund (see link for report) (Afgrænsningsudtalelse for miljøkonsekvensvurdering (VVM) af koncessionsvinderens landanlæg til Nordsøen I, Nord frem til POC Idomlund) |
Published |
| 4203 | Scoping of environmental impact assessment (EIA) of the concessionaire’s [1 GW] land-based project for North Sea I, Mid to POC Endrup (see link for report) (Afgrænsningsudtalelse for miljøkonsekvensvurdering (VVM) af koncessionsvinderens landanlæg til Nordsøen I, Midt frem til POC Endrup) |
Published |
| 4204 | Scoping of environmental impact assessment (EIA) of the concessionaire’s [1 GW] land-based project for North Sea I, South to POC Endrup (see link for report) (Afgrænsningsudtalelse for miljøkonsekvensvurdering (VVM) af koncessionsvinderens landanlæg til Nordsøen I, Syd frem til POC Endrup) |
Published |
| 4205 | Environmental Statement/SEA report for North Sea I plan made public (Offentliggørelse af miljørapport for plan for Nordsøen I) (see link for full report) |
Published |
| 4206 | SEA summary statement (see link for report) (Sammenfattende redegørelse for miljøvurdering af plan (SMV)) |
Published |
| 4207 | EIA report for the concessionaire’s [1 GW] land-based project submitted and made public, North Sea I, North to POC Idomlund |
Paused - Until further noticed |
| 4208 | EIA report for the concessionaire’s [1 GW] land-based project submitted and made public, North Sea I, Mid to POC Endrup |
December 2025 |
| 4209 | EIA report for the concessionaire’s [1 GW] land-based project submitted and made public, North Sea I, South to POC Endrup |
Q2 2026 |
| 4210 | EIA permit for the concessionaire’s [1 GW] land-based project obtained for North Sea I, North to POC Idomlund (VVM-tilladelse til landanlæg meddelt for koncessionsvinders landanlæg tilknyttet Nordsøen I, Nord, der kobles til POC Idomlund) |
Paused - Until further noticed |
| 4211 | EIA permit for the concessionaire’s [1 GW] land-based project obtained for North Sea I, Mid to POC Endrup (VVM-tilladelse til landanlæg meddelt for koncessionsvinders landanlæg tilknyttet Nordsøen I, Midt, der kobles til POC Endrup) |
Maj 2026 |
| 4212 | EIA permit for the concessionaire’s [1 GW] land-based project obtained for North Sea I, South to POC Endrup (VVM-tilladelse til landanlæg meddelt for koncessionsvinders landanlæg tilknyttet Nordsøen I, Syd, der kobles til POC Endrup) |
December 2026 |
| 4213 | Amendment to municipality plan and district plan for the concessionaire’s substation near shore, North Sea I, North POC Idomlund (Kommuneplantillæg og lokalplaner meddelt for koncessionsvinders kystnære station) |
Q1 2026 |
| 4214 | Amendment to municipality plan and district plan for the concessionaire’s substation near the grid connection point, North Sea I, North POC Idomlund (Kommuneplantillæg og lokalplaner meddelt for koncessionsvinders station nær POC) |
Q1 2026 |
| 4215 | Amendment to municipality plan and district plan for the concessionaire’s substation near shore, North Sea I, Mid POC Endrup (Kommuneplantillæg og lokalplaner meddelt for koncessionsvinders kystnære station) |
Maj 2026 |
| 4216 | Amendment to municipality plan and district plan for the concessionaire’s substation near the grid connection point, North Sea I, Mid POC Endrup (Kommuneplantillæg og lokalplaner meddelt for koncessionsvinders station nær POC) |
Maj 2026 |
| 4217 | Amendment to municipality plan and district plan for the concessionaire’s substation near shore, North Sea I, South POC Endrup (Kommuneplantillæg og lokalplaner meddelt for koncessionsvinders kystnære station) |
Maj 2026 |
| 4218 | Amendment to municipality plan and district plan for the concessionaire’s substation near the grid connection point, North Sea I, South POC Endrup (Kommuneplantillæg og lokalplaner meddelt for koncessionsvinders station nær POC) |
Maj 2026 |
| Technical reports and reports on environment | ||
| 4219 | Benthic fauna and flora | Published |
| 4220 | Marine mammals (Year 1) | Published |
| USBL report | Published | |
| 4221 | Marine mammals (Year 2) | Published |
| 4222 | Birds (Year 1) | Published |
| Bird Distribution responses to wind farms – common scoter and divers | Published | |
| 4223 | Birds (Year 2) | Published |
| 4224 | Bats (Year 1) | Published |
| 4225 | Fish and fish populations | Published |
| 4226 | Fisheries | Published |
| 4227 | Underwater noise and vibrations | Published |
| 4228 | Radar and radio interference | Published |
| 4229 | Marine traffic and safety of navigation (HAZID) | Published |
| 4230 | Bats (Year 2) | Published |
| 4231 | Initial results of bat survey | Published |
| 4300 | Seabed investigations | |
| 4301 | Geology and sea-level, desk study | Published |
| 4302 | Marine archaeology: Archaeological analysis, desk study | Published |
| 4303 | Geophysical site survey, report | |
| 4303.01 | Report no 1, 2DUHRS survey, Baseline (10 km grid), Full site | Published |
| 4303.02 | Report no 2, 2D UHRS survey, 3D Geomodel integrated with CPT data, Full site |
Published (See Azure) |
| 4303.03 | Report no 3, 2D UHRS survey, 3D Geomodel integrated with CPT data and BH data, Area 1 |
Published |
| 4303.04 | Report no 4, 2D UHRS survey, 3D Geomodel integrated with CPT and BH data, Full site |
2025-12-01 |
| 4303.05 | Report no 5, Geophysical site survey, MBES, SSS, SBP, MAG, Area 1 | Published |
| 4303.06 | Report no 6, Geophysical site survey, MBES, SSS, SBP, MAG, Full site | Published (see Azure) |
| 4304 | Preliminary geotechnical investigations, report – Area 1 | |
| 4304.11 | Operations Report, Seabed CPT campaign (Normand Mermaid) | Published |
| 4304.12 | Operations Report, Borehole campaign (Voyager) | Published |
| 4304.13 | Operations Report, Borehole campaign (Gargano) | Published (see Azure) |
| 4304.14 | Operations Report, Borehole campaign (Excalibur) | Published |
| 4304.21 | Factual Report, Seabed CPT campaign - Deep | Published (see Azure) |
| 4304.22 | Factual Report, Seabed CPT campaign - Shallow | Published (see Azure) |
| 4304.31 | Factual Report, Seabed CPT campaign - Partial offshore data | Published (see Azure) |
| 4304.32 | Factual Report, Seabed CPT campaign - Complete offshore data | Published (see Azure) |
| 4304.33 | Factual Report, Seabed CPT campaign - Partial laboratory data | Published |
| 4304.34 | Factual Report, Borehole campaign - Cyclic test report | Published |
| 4305 | Preliminary geotechnical investigations, report – Area 2 | |
| 4305.11 | Operations Report, Seabed CPT campaign (Normand Mermaid) | Published |
| 4305.12 | Factual Report, Seabed CPT campaign - Deep | Published (updated) |
| 4305.13 | Factual Report, Borehole campaign - Complete laboratory data | 2026-07-01 |
| 4305.14 | Operations Report, Borehole campaign | 2026-07-01 |
| 4308 | UXO threat and risk assessment, report | Published |
| 4309 | Marine archaeology: Geoarchaeological analysis, report – Area 1 | Published |
| 4310 | Marine archaeology: Geoarchaeological analysis, report – Area 2 | Published |
| 4311 | Export cables, cable route survey report | Published |
| 4312 |
Burial Assessment Study – Nymindegab North Cable Burial Risk |
Published |
| Published | ||
| Published | ||
| 4313 | Export cables, Geotechnical Site Investigations | |
| 4313.11 | A1 Nymindegab South - Landfall Site Investigations | Published |
| 4313.12 | A1 Nymindegab South - Landfall to Substation Site Investigations | Published (See Azure) |
| 4313.13 | A2 Nymindegab North - Landfall Site Investigations | Published |
| 4313.14 | A2 Nymindegab North - Landfall to Substation Site Investigations | Published (See Azure) |
| 4313.15 | A3 Vedersø Klit - Landfall Site Investigations | Published |
| 4313.16 | A3 Vedersø Klit - Landfall to Substation Site Investigations | Published (See Azure) |
The list is continuously updated with an indication of when each report and dataset is expected to be published. The Danish Energy Agency will upload the reports on this webpage as soon as possible when they are finalised.
| ID | Delivery | Date |
|---|---|---|
| 3000 | Kriegers Flak II Offshore wind farm | |
| 3100 | MetOcean | |
| 3101 | Measurement Plan (Updated January 2024) | Published |
| 3102 | Measurements (data) | Published |
| 3103 | Measurement Reports | Published |
| 3104 | Published | |
| 3105 | Site Wind Conditions Assessment Report | Published |
| 3106 | Site Ice Conditions Assessment Report | Published |
| 3107 |
Statement of Feasibility from Certification Body Evaluation Report Site Conditions - Measurement Campaign Evaluation Report Site Conditions – Wind Conditions |
Published |
| 3108 | Reverification note for Site MetOcean Conditions Assessment Report | Published |
| 3109 | Reverification note for Site Wind Conditions Assessment Report | Published |
| 3200 | Environmental assessments and permits | |
| 3201 | Afgrænsningsudtalelse for miljøvurdering af plan for Kattegat (II) og Kriegers Flak II (Scoping of Strategic environmental assessment (SEA) for Kattegat (II) and Kriegers Flak II, in Danish) |
Published |
| 3202 | Scoping of environmental impact assessment (EIA) of the concessionaire’s 1 GW land-based project for Kriegers Flak II (Afgrænsningsudtalelse for miljøkonsekvensvurdering (VVM) af koncessionsvinderens landanlæg til Kriegers Flak II) |
Published |
| 3203 | Environmental report (SEA) for the plan of Kattegat II and Kriegers Flak II made public (Offentliggørelse af miljørapport for plan for Kattegat II og Kriegers Flak II) (see link for full report) |
Published |
| 3204 | SEA summary statement (Sammenfattende redegørelse for miljøvurdering af planen (SMV)) |
Published |
| 3205 | EIA report for the concessionaire’s 1 GW land-based project submitted and made public |
Paused - Until further notice |
| 3206 | EIA permit for the concessionaire land-based project obtained (VVM-tilladelse til landanlæg meddelt) |
Paused - Until further notice |
| 3207 | Amendment to municipality plan and district plan for the concessionaire’s substation near shore (Kommuneplantillæg og lokalplaner meddelt for koncessionsvinders kystnære station) |
November 2025 |
| 3208 | Amendment to municipality plan and district plan for concessionaire’s substation near the grid connection point (Kommuneplantillæg og lokalplaner meddelt for koncessionsvinders station nær POC) |
April 2026 |
| Technical reports and reports on environment | ||
| 3209 | Benthic fauna and flora | Published |
| 3210 | Marine mammals (Year 1) | Published |
| 3211 | Marine mammals (Year 2) | Published |
| 3212 | Birds (Year 1) | Published |
| 3213 | Birds (Year 2) | Published |
| 3214 | Bats (Year 1) | Published |
| 3215 | Fish and fish populations | Published |
| 3216 | Fisheries | Published |
| 3217 | Underwater noise and vibrations | Published |
| 3218 | Radar and radio interference | Published |
| 3219 | Marine traffic and safety of navigation (HAZID) | Published |
| 3220 | Bats (Year 2) | 2025-11-19 |
| 3300 | Seabed investigations | |
| 3301 | Geology and sea-level, desk study | Published |
| 3302 | Marine archaeology: Archaeological analysis, desk study | Published |
| 3303 | Geophysical site survey, report | Published |
| 3304 | Preliminary geotechnical investigations, report | Published (see Azure) Updated July 2024 |
| 3305 | Published | |
| 3306 | UXO threat and risk assessment, report | Published |
| 3307 | Marine archaeology: Geoarchaeological analysis, report | Published |
| 3308 | Export cables, cable route survey report | Published |
| 3309 |
Cable Burial Risk Assessment |
Published Published (See Azure) |
|
3310 3310.11 3310.12 |
Export cables, Geotechnical Site Investigations Landfall to Substation Site Investigations |
Published Published (See Azure) |
The list is continuously updated with an indication of when each report and dataset is expected to be published. The Danish Energy Agency will upload the reports on this webpage as soon as possible when they are finalised.
Explanatory notes for the preliminary investigations and environmental assessments for Kattegat OWF
Change log - Kattegat OWF - Updated 2025-01-31
| ID | Delivery | Date |
|---|---|---|
| 1000 | Kattegat – Offshore wind farm | |
| 1100 |
MetOcean
|
|
| 1101 | Measurement Plan (Updated January 2024) | Published |
| 1102 | Measurements (data) | Published |
| 1103 | Measurement Reports | Published |
| 1104 | Published | |
| 1105 | Site Wind Conditions Assessment Report | Published |
| 1106 | Site Ice Conditions Assessment Report | Published |
| 1107 |
Statement of feasibility from Certification Body Evaluation Report Site Conditions – Measurement Campaign Evaluation Report Site Conditions – Wind Conditions |
Published |
| 1108 | Reverification note for Site MetOcean Conditions Assessment Report | Published |
| 1109 | Reverification note for Site Wind Conditions Assessment Report | Published |
| 1200 | Environmental assessments and permits | |
| 1201 | Afgrænsningsudtalelse for miljøvurdering af plan for Kattegat (II) og Kriegers Flak II (Scoping of Strategic environmental assessment (SEA) for Kattegat (II) and Kriegers Flak II, in Danish) |
Published |
| 1202 |
Scoping of environmental impact assessment (EIA) of
the concessionaire’s 1 GW land-based project for Kattegat |
Published |
| 1203 | Environmental report (SEA) for the plan of Kattegat and Kriegers Flak II made public (Offentliggørelse af miljørapport for plan for Kattegat og Kriegers Flak II) (see link for full report) |
Published |
| 1204 | SEA summary statement (see link for report) (Sammenfattende redegørelse for miljøvurdering af planen (SMV)) |
Published |
| 1205 | EIA report for the concessionaire’s 1 GW land-based project submitted and made public |
Paused - Until further notice |
| 1206 | EIA permit for the concessionaire’s 1 GW land-based project obtained (VVM-tilladelse til landanlæg meddelt) |
Paused - Until further notice |
| 1207 | Amendment to municipality plan and district plan for the concessionaire’s substation near shore (Kommuneplantillæg og lokalplaner meddelt for koncessionsvinders kystnære station) |
November 2025 |
| 1208 | Amendment to municipality plan and district plan for concessionaire’s substation near the grid connection point (Kommuneplantillæg og lokalplaner meddelt for koncessionsvinders station nær POC) |
March 2026 |
| Technical reports and reports on environment | ||
| 1209 | Benthic fauna and flora | Published |
| 1210 | Marine mammals (Year 1) | Published |
| 1211 | Marine mammals (Year 2) | Published |
| 1212 | Birds (Year 1) | Published |
| 1213 | Birds (Year 2) | Published |
| 1214 | Bats (Year 1) | Published |
| 1215 | Fish and fish populations | Published |
| 1216 | Fisheries | Published |
| 1217 | Underwater noise and vibrations | Published |
| 1218 | Radar and radio interference | Published |
| 1219 | Marine traffic and safety of navigation (HAZID) | Published |
| 1220 | Bats (Year 2) | 2025-11-19 |
| 1300 | Seabed investigations | |
| 1301 | Geology and sea-level, desk study | Published |
| 1302 | Marine archaeology: Archaeological analysis, desk study | Published |
| 1303 | Geophysical site survey, report | Published |
| 1304 | Preliminary geotechnical investigations, report | Published (see Azure) Updated July 2024 |
| 1305 | Integrated 3D geological model | Published |
| 1306 | UXO threat and risk assessment, report | Published |
| 1307 | Marine archaeology: Geoarchaeological analysis, report | Published |
| 1308 | Export cables, cable route survey report | Published |
| 1309 | Published | |
|
1310 1310.11 1310.12 |
Export cables, Geotechnical Site Investigations Landfall to Substation Site Investigations |
Published Published (see Azure) |
The list is continuously updated with an indication of when each report and dataset is expected to be published. The Danish Energy Agency will upload the reports on this webpage as soon as possible when they are finalised.
The list below shows the results of the preliminary investigations and environmental assessments carried out for the former location of Hesselø OWF. The list will not be further updated as it has been politically decided to move Hesselø OWF to a new location.
Data and results from preliminary investigations
| ID | Deliverable | Date | Note |
|---|---|---|---|
| 100 | MetOcean | ||
| 101 | Lidar Final Report | Published | Note 7 |
| 102 | Site Wind Conditions Assessment | Published | Note 8 |
| 103 |
Reports on Ocean data (Hindcast) Metocean Conditions Assessment |
Published | Note 9 |
| 200 | Environmental assessments and permits | ||
| 201 |
Scoping of strategic environmental assessment (SEA) (Afgrænsningsudtalelse for strategisk miljøvurdering |
Published | Note 10 |
| 202 | Scoping of environmental impact assessment (EIA) of the land-based project for Hesselø OWF (Afgrænsningsudtalelse for miljøvurdering (VVM) af landanlægget til Hesselø Havvindmøllepark) |
Published | Note 11 |
| 203 | Planning consent for extension of Hovegård substation and new Pårup substation approved and made public (Landsplandirektiv for udvidelse af Hovegård højspændingsstation og ny kompenseringsstation ved Pårup vedtaget og publiceret) |
See new site | Note 12 |
| 204 | Environmental Statement/SEA report for plan Hesselø OWF made public (Offentliggørelse af miljørapport (SMV) for planen for Hesselø Havvindmøllepark) |
See new site | Note 13 |
| 205 | EIA report for the land-based project submitted and made public (Miljøkonsekvensrapport for landanlæg til Hesselø Havvindmøllepark i høring) |
See new site | Note 14 |
| 206 | EIA permit for land-based project obtained (VVM-tilladelse til landanlæg meddelt) |
See new site | Note 15 |
| 207 | SEA summary statement (Sammenfattende redegørelse for strategisk miljøvurdering (SMV)) |
See new site | Note 23 |
| Technical reports and reports on environment | |||
| 208 |
Ornithological assessment in relation to plans |
Published Published |
Note 1 |
| 209 | Marine mammals - technical report | Published | Note 16 |
| 210 |
Benthic flora and fauna: Hard bottom |
Published | Note 17 |
| 211 |
Visualiseringsrapport – Hesselø Havvindmøllepark |
Published | Note 18 |
| 212 | Navigational risk assessment of Hesselø offshore wind farm - Risk Assessment Report |
Published | Note 19 |
| 213 | Radar and radio interference - Technical report | Published | Note 20 |
| 214 | Fish – technical report Fisheries – technical report |
Published | Note 21 |
| 215 | Underwater noise – technical report | Published | Note 22 |
| 300 | Seabed investigations | ||
| Geophysical survey | |||
| 301 | Published | Note 1 | |
| 302 | Export cables routes survey report | Published | Note 1 |
| 303 | Hydrographical Report, wind farm site | Published | Note 2 |
| 304 | Hydrographical report, export cable routes | Published | Note 3 |
| 305 |
Marine Archaeology Geoarkæologisk Analyse – Offshore Wind Farm Geoarkæologisk Analyse OWF - Bilag Geoarkæologisk Analyse – Export Cable Corridor |
Published | Note 4 |
| 306 |
UXO risk assessment report Desk study for potential UXO contamination Desk study for potential UXO contamination |
Published | Note 1 |
| Geotechnical investigations | |||
| 307 | Geological desk study | Published | Note 1 |
| 308 | Final Factual Geotechnical Report | Published | Note 5 |
| 309 |
3D geological model reports |
Published | Note 6 |
| 310 | Desk study: Metocean weather windows | Published | Note 1 |
| 311 | Landfall HDD - Geotechnical investigations – Gilbjerg Hoved |
Published |
The scope of works for seabed investigations are available (zip)
WSP (2023) – Notes on migratory birds for Kattegat II og Hesselø Syd
GIS-files for surveyed export cables (North Sea I, Kriegers Flak II, Kattegat and Hesselø)
WSP (2023) – Notes on Bats near Hesselø and the Southern Kattegat
Notes on environmental assessment for offshore wind farm tenders
Regarding Bathymetric Data
Appendix – Application Template for Access Request to Bathymetric Data – Hesselø South
Appendix – Application Template for Access Request to Bathymetric Data – Nordsøen I – Mid
Appendix - Application Template for Access Request to Bathymetric Data – Nordsøen I - South