Preliminary investigations for North Sea I, Kriegers Flak II, Kattegat and Hesselø offshore wind farms
Read about the results of the preliminary investigations for North Sea I, Kriegers Flak II, Kattegat and Hesselø Offshore Wind Farms (OWF).
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.
Access to the data platform
- The data platform for North Sea I, Kriegers Flak II, Kattegat and the new Hesselø site is not yet available. Stay informed on this site for the latest update about data availability.
- For the access to the data platform regarding the former Hesselø site, please see further down.
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
| ID | Delivery | Date |
|---|---|---|
| 4000 | North Sea I – Offshore wind farm(s) | |
| 4100 | Metocean | |
| 4101 | Measurement Plan | Published |
| 4102 | Measurements (data) | 2024-10-31 |
| 4103 | Measurement Reports | 2024-10-31 |
| 4104 | Site Metocean Conditions Assessment Report | 2024-10-31 |
| 4105 | Site Wind Conditions Assessment Report | 2024-10-31 |
| 4106 | Statement of feasibility from Certification Body | 2024-12-31 |
| 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, A3 to POC Idomlund (Afgrænsningsudtalelse for miljøkonsekvensvurdering (VVM) af koncessionsvinderens landanlæg til Nordsøen I, A3 frem til POC Idomlund) |
Ultimo 2023 |
| 4203 | Scoping of environmental impact assessment (EIA) of the concessionaire’s [1 GW] land-based project for North Sea I, A2 to POC Endrup (Afgrænsningsudtalelse for miljøkonsekvensvurdering (VVM) af koncessionsvinderens landanlæg til Nordsøen I, A2 frem til POC Endrup) |
Ultimo 2023 |
| 4204 | Scoping of environmental impact assessment (EIA) of the concessionaire’s [1 GW] land-based project for North Sea I, A1 to POC Endrup (Afgrænsningsudtalelse for miljøkonsekvensvurdering (VVM) af koncessionsvinderens landanlæg til Nordsøen I, A1 frem til POC Endrup) |
Ultimo 2023 |
| 4205 | Environmental Statement/SEA report for North Sea I plan made public (Offentliggørelse af miljørapport for plan for Nordsøen I) |
February 2024 |
| 4206 | SEA summary statement (Sammenfattende redegørelse for miljøvurdering af plan (SMV)) |
August 2024 |
| 4207 | EIA report for the concessionaire’s [1 GW] land-based project submitted and made public, North Sea I, A3 to POC Idomlund | Q3 2025 |
| 4208 | EIA report for the concessionaire’s [1 GW] land-based project submitted and made public, North Sea I, A2 to POC Endrup | Q3 2025 |
| 4209 | EIA report for the concessionaire’s [1 GW] land-based project submitted and made public, North Sea I, A1 to POC Endrup | Q3 2025 |
| 4210 | EIA permit for the concessionaire’s [1 GW] land-based project obtained for North Sea I, A3 to POC Idomlund (VVM-tilladelse til landanlæg meddelt for koncessionsvinders landanlæg tilknyttet Nordsøen I, A3, der kobles til POC Idomlund) |
November 2025 |
| 4211 | EIA permit for the concessionaire’s [1 GW] land-based project obtained for North Sea I, A2 to POC Endrup (VVM-tilladelse til landanlæg meddelt for koncessionsvinders landanlæg tilknyttet Nordsøen I, A2, der kobles til POC Endrup) |
November 2025 |
| 4212 | EIA permit for the concessionaire’s [1 GW] land-based project obtained for North Sea I, A1 to POC Endrup (VVM-tilladelse til landanlæg meddelt for koncessionsvinders landanlæg tilknyttet Nordsøen I, A1, der kobles til POC Endrup) |
November 2025 |
| 4213 | Amendment to municipality plan and district plan for the concessionaire’s substation near shore, North Sea I, A3 POC Idomlund (Kommuneplantillæg og lokalplaner meddelt for koncessionsvinders kystnære station) | November 2025 |
| 4214 | Amendment to municipality plan and district plan for the concessionaire’s substation near the grid connection point, North Sea I, A3 POC Idomlund (Kommuneplantillæg og lokalplaner meddelt for koncessionsvinders station nær POC) | November 2025 |
| 4215 | Amendment to municipality plan and district plan for the concessionaire’s substation near shore, North Sea I, A2 POC Endrup (Kommuneplantillæg og lokalplaner meddelt for koncessionsvinders kystnære station) | November 2025 |
| 4216 | Amendment to municipality plan and district plan for the concessionaire’s substation near the grid connection point, North Sea I, A2 POC Endrup (Kommuneplantillæg og lokalplaner meddelt for koncessionsvinders station nær POC) | November 2025 |
| 4217 | Amendment to municipality plan and district plan for the concessionaire’s substation near shore, North Sea I, A1 POC Endrup (Kommuneplantillæg og lokalplaner meddelt for koncessionsvinders kystnære station) | November 2025 |
| 4218 | Amendment to municipality plan and district plan for the concessionaire’s substation near the grid connection point, North Sea I, A1 POC Endrup (Kommuneplantillæg og lokalplaner meddelt for koncessionsvinders station nær POC) | November 2025 |
| Technical reports and reports on environment | ||
| 4219 | Benthic fauna and flora | 2024-11-15 |
| 4220 | Marine mammals (Year 1) | 2024-11-15 |
| 4221 | Marine mammals (Final) | Ultimo 2025 |
| 4222 | Birds (Year 1) | 2024-11-15 |
| 4223 | Birds (Final) | Ultimo 2025 |
| 4224 | Bats (Year 1) | 2024-11-15 |
| 4225 | Fish and fish populations | 2024-11-15 |
| 4226 | Fisheries | 2024-11-05 |
| 4227 | Underwater noise and vibrations | 2024-10-05 |
| 4228 | Radar and radio interference | 2024-06-05 |
| 4229 | Marine traffic and safety of navigation (HAZID) | 2024-10-05 |
| 4230 | Bats (final) | Ultimo 2025 |
| 4300 | Seabed investigations | |
| 4301 | Geology and sea-level, desk study | Published |
| 4302 | Marine archaeology: Archaeological analysis, desk study | 2023-12-15 |
| 4303 | Geophysical site survey, report | 2024-10-01 |
| 4304 | Preliminary geotechnical investigations, report – Area 1 | 2025-07-01 |
| 4305 | Preliminary geotechnical investigations, report – Area 2 (potential future tender(s)) | 2026-07-01 |
| 4306 | Integrated 3D geological model – Area 1 | 2025-12-31 |
| 4307 | Integrated 3D geological model – Area 2 (potential future tender(s)) | 2026-12-31 |
| 4308 | UXO threat and risk assessment, report | 2023-12-31 |
| 4309 |
Marine archaeology: Geoarchaeological analysis, report – Area 1 |
2025-02-01 |
| 4310 | Marine archaeology: Geoarchaeological analysis, report – Area 2 (potential future tender(s)) | 2025-08-01 |
| 4311 | Export cables, cable route survey report | 2024-12-01 |
| 4312 | Export cables, Cable Burial Assessment | 2025-02-01 |
| 4313 | Export cables, Landfall Site investigations | 2024-12-01 |
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 | Published |
| 3102 | Measurements (data) | 2024-10-31 |
| 3103 | Measurement Reports | 2024-10-31 |
| 3104 | Site MetOcean Conditions Assessment Report | 2024-09-30 |
| 3105 | Site Wind Conditions Assessment Report | 2024-09-30 |
| 3106 | Site Ice Conditions Assessment Report | 2024-09-30 |
| 3107 | Statement of feasibility from Certification Body | 2024-11-30* |
| 3108 | Reverification note for Site MetOcean Conditions Assessment Report | 2025-02-28* |
| 3109 | Reverification note for Site Wind Conditions Assessment Report | 2024-11-30* |
| 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) |
Medio 2023 |
| 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) | February 2024 |
| 3204 | SEA summary statement (Sammenfattende redegørelse for miljøvurdering af planen (SMV)) |
August 2024 |
| 3205 | EIA report for the concessionaire’s 1 GW land-based project submitted and made public | Q3 2025 |
| 3206 | EIA permit for the concessionaire’s 1 GW land-based project obtained (VVM-tilladelse til landanlæg meddelt) |
November 2025 |
| 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) | November 2025 |
| Technical reports and reports on environment | ||
| 3209 | Benthic fauna and flora | 2024-12-01 |
| 3210 | Marine mammals (Year 1) | 2024-11-15 |
| 3211 | Marine mammals (Final) | Ultimo 2025 |
| 3212 | Birds (Year 1) | 2024-11-15 |
| 3213 | Birds (Final) | Ultimo 2025 |
| 3214 | Bats | 2024-11-15 |
| 3215 | Fish and fish populations | 2024-12-01 |
| 3216 | Fisheries | 2024-11-05 |
| 3217 | Underwater noise and vibrations | 2024-05-05 |
| 3218 | Radar and radio interference | 2024-04-05 |
| 3219 | Marine traffic and safety of navigation (HAZID) | 2024-08-05 |
| 3220 | Bats (final) | Ultimo 2025 |
| 3300 | Seabed investigations | |
| 3301 | Geology and sea-level, desk study | Published |
| 3302 | Marine archaeology: Archaeological analysis, desk study | 2023-12-15 |
| 3303 | Geophysical site survey, report | 2024-05-01 |
| 3304 | Preliminary geotechnical investigations, report | 2024-07-01 |
| 3305 | Integrated 3D geological model | 2024-09-01 |
| 3306 | UXO threat and risk assessment, report | 2023-12-01 |
| 3307 | Marine archaeology: Geoarchaeological analysis, report | 2025-01-15 |
| 3308 | Export cables, cable route survey report | 2024-09-01 |
| 3309 | Export cables, Cable Burial Assessment | 2024-09-01 |
| 3310 | Export cables, Landfall Site investigations | 2024-09-01 |
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
| ID | Delivery | Date |
|---|---|---|
| 1000 | Kattegat – Offshore wind farm | |
| 1100 |
MetOcean
|
|
| 1101 | Measurement Plan | Published |
| 1102 | Measurements (data) | 2024-09-30 |
| 1103 | Measurement Reports | 2024-09-30 |
| 1104 | Site MetOcean Conditions Assessment Report | 2024-10-31 |
| 1105 | Site Wind Conditions Assessment Report | 2024-10-31 |
| 1106 | Site Ice Conditions Assessment Report | 2024-10-31 |
| 1107 | Statement of feasibility from Certification Body | 2024-12-31* |
| 1108 | Reverification note for Site MetOcean Conditions Assessment Report | 2025-02-28* |
| 1109 | Reverification note for Site Wind Conditions Assessment Report | 2024-11-30 |
| 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
(Afgrænsningsudtalelse for miljøkonsekvensvurdering (VVM) af koncessionsvinderens landanlæg til Kattegat)
|
January/February 2024 |
| 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) | February 2024 |
| 1204 | SEA summary statement (Sammenfattende redegørelse for miljøvurdering af planen (SMV)) |
August 2024 |
| 1205 | EIA report for the concessionaire’s 1 GW land-based project submitted and made public | Q3 2025 |
| 1206 | EIA permit for the concessionaire’s 1 GW land-based project obtained (VVM-tilladelse til landanlæg meddelt) |
November 2025 |
| 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) | November 2025 |
| Technical reports and reports on environment | ||
| 1209 | Benthic fauna and flora | 2024-12-01 |
| 1210 | Marine mammals (Year 1) | 2024-11-15 |
| 1211 | Marine mammals (Final) | Ultimo 2025 |
| 1212 | Birds (Year 1) | 2024-11-15 |
| 1213 | Birds (Final) | Ultimo 2025 |
| 1214 | Bats | 2024-11-15 |
| 1215 | Fish and fish populations | 2024-12-01 |
| 1216 | Fisheries | 2024-11-05 |
| 1217 | Underwater noise and vibrations | 2024-05-05 |
| 1218 | Radar and radio interference | 2024-04-05 |
| 1219 | Marine traffic and safety of navigation (HAZID) | 2024-08-05 |
| 1220 | Bats (final) | Ultimo 2025 |
| 1300 | Seabed investigations | |
| 1301 | Geology and sea-level, desk study | Published |
| 1302 | Marine archaeology: Archaeological analysis, desk study | Published |
| 1303 | Geophysical site survey, report | 2024-04-01 |
| 1304 | Preliminary geotechnical investigations, report | 2024-07-01 |
| 1305 | Integrated 3D geological model | 2024-09-01 |
| 1306 | UXO threat and risk assessment, report | 2023-12-01 |
| 1307 | Marine archaeology: Geoarchaeological analysis, report | 2025-01-15 |
| 1308 | Export cables, cable route survey report | 2024-09-01 |
| 1309 | Export cables, Cable Burial Assessment | 2024-09-01 |
| 1310 | Export cables, Landfall Site investigations | 2024-09-01 |
* Dates are tentative and will be updated when confirmed.
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 |
|---|---|---|
| 2000 | Hesselø Offshore Wind Farm (new) | |
| 2100 | Metocean | |
| 2101 | Measurement Plan | Published |
| 2102 | Measurements (data) | 2024-09-30 |
| 2103 | Measurement Reports | 2024-09-30 |
| 2104 | Site Metocean Conditions Assessment Report | 2024-09-30 |
| 2105 | Site Wind Conditions Assessment Report | 2024-09-30 |
| 2106 | Site Ice Conditions Assessment Report | 2024-09-30 |
| 2107 | Statement of feasibility from Certification Body | 2024-11-30* |
| 2108 | Reverification note for Site Metocean Conditions Assessment Report | 2025-02-28* |
| 2109 | Reverification note for Site Wind Conditions Assessment Report | 2024-11-30 |
| 2200 | Environmental assessments and permits | |
| 2201 | Afgrænsningsudtalelse for miljøvurdering af plan for Hesselø (Scoping of Strategic environmental assessment (SEA) for Hesselø OWF, in Danish) | Published |
| 2202 | Afgrænsningsudtalelse for miljøkonsekvensvurdering (VVM) af landanlægget til Hesselø (Scoping of environmental impact assessment (EIA) of the land-based project for Hesselø OWF, in Danish) | Published |
| 2203 | Environmental Statement/SEA report for Hesselø plan made public (Offentliggørelse af miljørapport for plan for Hesselø) |
Feb 2024* |
| 2204 | SEA summary statement (Sammenfattende redegørelse for miljøvurdering (SMV) af plan) |
Medio 2024* |
| 2205 | EIA report for the land-based project submitted and made public | February 2024* |
| 2206 | EIA permit for land-based project obtained (VVM-tilladelse til landanlæg meddelt) |
Medio 2024* |
| 2207 | Planning documents for Hesselø onshore elements Plangrundlag (landsplandirektiv) |
Medio 2024* |
| Technical reports and reports on environment | ||
| 2208 | Benthic fauna and flora | 2024-12-01 |
| 2209 | Marine mammals (Year 1) | 2024-11-15 |
| 2210 | Marine mammals (Final) | Ultimo 2025 |
| 2211 | Birds (Year 1) | 2024-11-15 |
| 2212 | Birds (Final) | Ultimo 2025 |
| 2213 | Bats | 2024-11-15 |
| 2214 | Fish and fish populations | 2024-12-01 |
| 2215 | Fisheries | 2024-11-05 |
| 2216 | Underwater noise and vibrations | 2024-05-05 |
| 2217 | Radar and radio interference | 2024-04-05 |
| 2218 | Marine traffic and safety of navigation (HAZID) | 2024-08-05 |
| 2219 | Bats (Final) | Ultimo 2025 |
| 2300 | Seabed investigations | |
| 2301 | Geology and sea-level, desk study | Published |
| 2302 | Marine archaeology: Archaeological analysis, desk study | Published |
| 2303 | Geophysical site survey, report | 2024-07-01 |
| 2304 | Preliminary geotechnical investigations, report | 2024-04-01 |
| 2305 | Integrated 3D geological model | 2024-09-01 |
| 2306 | UXO threat and risk assessment, report | 2023-12-01 |
| 2307 | Marine archaeology: Geoarchaeological analysis, report | 2024-09-01 |
| 2308 | Export cables, cable route survey report | 2024-09-01* |
| 2309 | Export cables, Cable Burial Assessment | 2024-09-01* |
| 2310 | Export cables, Landfall Site investigations | 2024-09-01* |
* Dates are tentative and will be updated when confirmed.
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
Access to data regarding the former Hesselø site can be obtained the following way:
Step 1: Interested bidders can request access to the data by notifying the Danish Energy Agency. Send the request to Randi Lucie Aliaga (rla@ens.dk) or Anders Møller Jørgensen (anmj@ens.dk) and include the following information:
-
Applicant name (company name or name of the consortium)
-
Applicant’s contact person, (name)
-
Applicant’s contact person, (email)
-
Applicant’s contact person, (telephone number)
Step 2: Energinet will thus send the applicant instructions regarding access to the FTP server with username and password.
|
ID |
Deliverable |
Date |
Note |
|---|---|---|---|
|
|
|
|
|
|
100 |
MetOcean |
|
|
|
101 |
Published |
Note 7 |
|
|
102 |
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) for Hesselø OWF (Afgrænsningsudtalelse for strategisk miljøvurdering (SMV) af Hesselø Havvindmøllepark) |
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) |
2022 |
Note 12 |
|
204 |
Environmental Statement/SEA report for plan Hesselø OWF made public (Offentliggørelse af miljørapport (SMV) for planen for Hesselø Havvindmøllepark) |
April 2022 |
Note 13 |
|
205 |
EIA report for the land-based project submitted and made public (Miljøkonsekvensrapport for landanlæg til Hesselø Havvindmøllepark i høring) |
April 2022 |
Note 14 |
|
206 |
EIA permit for land-based project obtained (VVM-tilladelse til landanlæg meddelt) |
Mid-2022 |
Note 15 |
|
207 |
SEA summary statement (Sammenfattende redegørelse for strategisk miljøvurdering (SMV)) |
Mid-2022 |
Note 23 |
|
|
|
|
|
|
|
Technical reports and reports on environment |
|
|
|
208 |
Published Published |
Note 1 |
|
|
209 |
Published |
Note 16 |
|
|
210 |
Benthic flora and fauna: Hard bottom - Technical report |
Published |
Note 17 |
|
211 |
Visualiseringsrapport – Hesselø Havvindmøllepark – eksempelvisualiseringer |
Published |
Note 18 |
|
212 |
Navigational risk assessment of Hesselø offshore wind farm - Risk Assessment Report |
Published |
Note 19 |
|
213 |
Published |
Note 20 |
|
|
214 |
Published |
Note 21 |
|
|
215 |
Published |
Note 22 |
|
|
|
|
|
|
|
300 |
Seabed investigations |
|
|
|
|
Geophysical survey |
|
|
|
301 |
Published
|
Note 1 |
|
|
302 |
Published |
Note 1 |
|
|
303 |
Published |
Note 2 |
|
|
304 |
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 – Hesselø windfarm site Desk study for potential UXO contamination – Hesselø export cable route |
Published |
Note 1 |
|
|
Geotechnical investigations |
|
|
|
307 |
Published |
Note 1 |
|
|
308 |
Published |
Note 5 |
|
|
309 |
3D geological model reports |
Published |
Note 6 |
|
310 |
Published |
Note 1 |
|
|
311 |
Published |
|