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Part B - Verifications and approval requirements 
[Doc. No. 342] 
[Doc. No. 343] 
Supplementary reports to the geotechnical design report and other verified 
reports in compliance with BHS stipulations 
Verification report(s) pertaining to Docs. No. 340, 341 and 342. 
3.5 Operating phase 
3.5.1 Preliminary remarks 
Foundation elements are not subject to any specific operating requirements during the opera 
tion of the installation once they have been appropriately and professionally installed. 
In order to monitor the overall behaviour of the foundation elements during the operating 
phase, parameters, such as shifting, deformation, component stress and frequencies, shall be 
measured and recorded (monitoring) in the area of the foundation elements at representative 
offshore wind turbine sites. These sites shall be selected in coordination with the geotechnics 
expert. Based on these results, the compliance of the interaction between the subsoil and the 
structure with the design and planning results shall be regularly examined and assessed by an 
expert within the scope of the periodic inspections. 
For all types of offshore structures, special requirements resulting from specific installation 
results or special demands as a result of innovative new foundation principles may arise dur 
ing the normal operations. 
For measures introduced during normal operations, the level of stability of the foundation ele 
ments against collapse is generally verified using the observation method. 
3.5.2 Technical codes of practice 
The geotechnical codes of practice to be applied during the operating phase are derived from 
DIN EN 1997 (EC 7) and the references contained therein and comply with the features of the 
foundation elements contained in the specific design documentation. 
3.5.3 Requirements and required verifications 
The requirements and required verifications shall comply with the respective project-specific 
stipulations resulting from the approvals, permits, authorisations and orders issued by the 
BSH. 
3.5.4 Documents to be submitted for maintaining the operating permit 
The documents to be submitted with respect to maintaining the operating permit, shall com 
ply with the respective project-specific stipulations resulting from the approvals, permits, au 
thorisations and orders issued by the approval authority responsible for granting the operating 
permit.