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 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 2024-12-09

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

Site Metocean Conditions Assessment Report - Part A

Site Metocean Conditions Assessment Report - Part B

Published
4105 Site Wind Conditions Assessment Report Published
4106 Statement of feasibility from Certification Body 2025-01-31
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, A3 to POC Idomlund  (see link for report)
(Afgrænsningsudtalelse for miljøkonsekvensvurdering (VVM) af koncessionsvinderens landanlæg til Nordsøen I, A3 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, A2 to POC Endrup (see link for report)
(Afgrænsningsudtalelse for miljøkonsekvensvurdering (VVM) af koncessionsvinderens landanlæg til Nordsøen I, A2 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, A1 to POC Endrup (see link for report)
(Afgrænsningsudtalelse for miljøkonsekvensvurdering (VVM) af koncessionsvinderens landanlæg til Nordsøen I, A1 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, 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) 
Januar 2026
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)
Januar 2026
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)
Januar 2026
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  Published
4220 Marine mammals (Year 1) Published
4221 Marine mammals (Final) 2025-10-15
4222 Birds (Year 1) Published
Bird Distribution responses to wind farms – common scoter and divers Published
4223 Birds (Final) 2025-10-15
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 (final) 2025-10-15
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 2025-03-01
4304.34 Factual Report, Seabed CPT campaign - Complete laboratory data 2025-07-01
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 campign 2026-07-01
4308 UXO threat and risk assessment, report Published
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 2025-02-01
4312

Burial Assessment Study – Nymindegab North Cable Burial Risk

Assessment – Nymindegab North

Published

Burial Assessment Study – Nymindegab South Cable

Assessment Study – Nymindegab South

Published

Burial Assessment Study – Vedersø Klit

Cable Assessment Study – Vedersø klit

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.

Explanatory notes for the preliminary investigations and environmental assessments for Kriegers Flak II OWF

Change log -  Kriegers Flak II OWF- Updated 2024-11-27

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

Site MetOcean Conditions Assessment Report - Part A

Site MetOcean Conditions Assessment Report - Part B

Published
3105 Site Wind Conditions Assessment Report Published
3106 Site Ice Conditions Assessment Report Published
3107 Statement of feasibility from Certification Body 2025-01-31
3108 Reverification note for Site MetOcean Conditions Assessment Report 2025-02-28*
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)
Q1 2025
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 December 2025
3206 EIA permit for the concessionaire’s 1 GW land-based project obtained
(VVM-tilladelse til landanlæg meddelt)
May 2026
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 2024-12-06
3210 Marine mammals (Year 1) Published
3211 Marine mammals (Final) 2025-10-15
3212 Birds (Year 1) Published
3213 Birds (Final) 2025-10-01
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 (final) 2025-09-01
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

Integrated 3D geological model - North site

Integrated 3D geological model - South Site

Published
3306 UXO threat and risk assessment, report Published
3307 Marine archaeology: Geoarchaeological analysis, report 2025-01-15
3308 Export cables, cable route survey report 2025-02-01
3309

Burial Assessment Study

Cable Burial Risk Assessment

Published Published (See Azure)

3310

3310.11

3310.12

Export cables, Geotechnical Site Investigations

Landfall Site Investigations

Landfall to Substation Site Investigations

 

2025-02-01 

2025-02-01

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

Change log - Kattegat OWF - Updated 2024-12-09

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

Site MetOcean Conditions Assessment Report - Part A

Site MetOcean Conditions Assessment Report - Part B

Published
1105 Site Wind Conditions Assessment Report Published
1106 Site Ice Conditions Assessment Report Published
1107 Statement of feasibility from Certification Body 2025-01-20
1108 Reverification note for Site MetOcean Conditions Assessment Report 2025-02-28*
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
 
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 Q3 2025
1206 EIA permit for the concessionaire’s 1 GW land-based project obtained
(VVM-tilladelse til landanlæg meddelt)
March 2026
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 (Final) 2025-10-15
1212 Birds (Year 1) Published
1213 Birds (Final) 2025-10-01
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 (final) 2025-09-01
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 2025-01-15
1308 Export cables, cable route survey report 2025-02-01
1309

Burial Assessment Study

Cable Burial Risk Assessment

Published

1310

1310.11

1310.12

Export cables, Geotechnical Site Investigations

Landfall Site Investigations

Landfall to Substation Site Investigations

 

2025-02-01

2025-02-01

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 Hesselø OWF (new site)

Change log - Hesselø OWF - Updated 2024-12-09

 

ID Delivery Date
2000 Hesselø Offshore Wind Farm (new)  
2100 Metocean  
2101 Measurement Plan (Updated January 2024) Published
2102 Measurements (data) Published
2103 Measurement Reports, final Published (see Azure)
2104

Site Metocean Conditions Assessment Report – Part A

Site Metocean Conditions Assessment Report – Part C

Published
2105 Site Wind Conditions Assessment Report

Published

Note

2106 Site Ice Conditions Assessment Report Published
2107 Statement of feasibility from Certification Body 2025-01-20
2108 Reverification note for Site Metocean Conditions Assessment Report 2025-02-28*
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)
Published
2204 SEA summary statement
(Sammenfattende redegørelse for miljøvurdering (SMV) af plan)
Published
2205 EIA report for the land-based project submitted and made public Published
2206 EIA permit for land-based project obtained
(VVM-tilladelse til landanlæg meddelt)
Ultimo 2024*
2207 Planning documents for Hesselø onshore elements
Plangrundlag (landsplandirektiv)
Published
  Technical reports and reports on environment  
2208 Benthic fauna and flora Published
2209 Marine mammals (Year 1) Published
2210 Marine mammals (Final) 2025-10-15
2211 Birds (Year 1) Published
2212 Birds (Final) 2025-10-01
2213 Bats (Year 1) Published
2214 Fish and fish populations Published
2215 Fisheries Published
2216 Underwater noise and vibrations Published
2217 Radar and radio interference Published
2218 Marine traffic and safety of navigation (HAZID) Published
2219 Bats (Final) 2025-09-01
2300 Seabed investigations  
2301 Geology and sea-level, desk study Published
2302 Marine archaeology: Archaeological analysis, desk study Published
2303 Geophysical site survey, report Published
2304 Preliminary geotechnical investigations, report Published (see Azure)
Updated July 2024
2305 Integrated 3D geological model Published
2306 UXO threat and risk assessment, report Published
2307

Marine Archaeology: Geoarchaeological Analysis, Report

Marine Archaeology: Geoarchaeological Analysis, Kabeltracé

Published
2308 Export cables, cable route survey report Published
2309 Export cables, Cable Burial Assessment Published
2310 Export cables, Landfall Site investigations Published

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
Hesselø - Ice Assessment
Certification Report - Metocean and Ice Conditions
Statement of Feasibility

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) 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

Birds

Ornithological assessment in relation to plans for offshore wind farm development in the Hesselø area, Kattegat

Published Published Note 1
209 Marine mammals - technical report Published Note 16
210 Benthic flora and fauna: Hard bottom - Technical report
Benthic flora and fauna: Soft bottom - Technical report
Benthic Soft bottom - Appendix 2 (Sediment sample analysis)
Published Note 17
211 Visualiseringsrapport – Hesselø Havvindmøllepark – eksempelvisualiseringer
Synlighedsanalyse - Teknisk rapport
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

Geophysical survey report, wind farm site

3D Seismic Survey Report

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

Geoarkæologisk Analyse OWF - Bilag

Geoarkæologisk Analyse – Export Cable Corridor

Geoarkæologisk Analyse ECR

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 Geological desk study Published Note 1
308 Final Factual Geotechnical Report Published Note 5
309

3D geological model reports

Integrated Geomodel
Integrated Geomodel - Enclosure 1

Published Note 6
310 Desk study: Metocean weather windows Published Note 1
311 Landfall HDD - Geotechnical investigations – Gilbjerg Hoved Published  

Contact

Preinvestigations
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Special Advisor
Randi Lucie Aliaga
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Advisor
Anders Møller Jørgensen
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Advisor
Sofie Bille Bruun
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