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Metadata: 2013, N-Sea Survey BV, Walney Extension, Geotechnical Investigation
Abstract:
N-Sea Survey B.V. (hereinafter referred to as N-Sea) was awarded the contract by DONG Energy Walney Extension (UK) Ltd. to undertake geotechnical sampling investigations, consisting of CPTs (cone penetration tests) and vibrocores at specified locations. Sixty six (66) locations were identified by DONG: 17 within the WOW03 site and 49 along the proposed export cable route. Geotechnical services were provided by specialist subcontractor Marine Sampling Holland (MSH) who provided the Manta CPT, hydraulic vibrocore equipment and four operators. Fieldwork operations were undertaken from the 32 m multicat, M.P.R. 3, which was chartered from Marine Projects Rotterdam. A total of 79 CPTs (including 13 repeats) and 76 vibrocores (incl. 10 repeats) were completed between 20 September and 5 October 2013. The approximate water depths ranged from -3 m LAT near shore to +48 m LAT at the WOW03 site. Various seabed features, including mega ripples and sand waves, were present on the seabed.
Data holder:
The Crown Estate
| Other details | ||
| Internal code | Internally assigned metadata identifier | 19391 |
| Title | The title is used to provide a brief and precise description of the dataset such as 'Date', 'Originating organisation/programme', 'Location' and 'Type of survey'. All acronyms and abbreviations should be reproduced in full. | 2013, N-Sea Survey BV, Walney Extension, Geotechnical Investigation |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | Geotechnical Investigation |
| File Identifier | The File Identifier is a code, preferably a GUID, that is globally unique and remains with the same metadata record even if the record is edited or transferred between portals or tools. | c6b6ffc7-7eda-40af-86da-be21493df30c |
| Resource Identifier | This is the code assigned by the data owner. | TCE-2221 |
| Resource type | The resource type will likely be a dataset but could also be a series (collection of datasets with a common specification) or a service. | series |
| Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 2013-09-20 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2013-10-05 |
| Frequency of updates | This describes the frequency with which the resource is modified or updated i.e. a monitoring programme that samples once per year has a frequency that is described as 'annually'. | notPlanned |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | N-Sea Survey B.V. (hereinafter referred to as N-Sea) was awarded the contract by DONG Energy Walney Extension (UK) Ltd. to undertake geotechnical sampling investigations, consisting of CPTs (cone penetration tests) and vibrocores at specified locations. Sixty six (66) locations were identified by DONG: 17 within the WOW03 site and 49 along the proposed export cable route. Geotechnical services were provided by specialist subcontractor Marine Sampling Holland (MSH) who provided the Manta CPT, hydraulic vibrocore equipment and four operators. Fieldwork operations were undertaken from the 32 m multicat, M.P.R. 3, which was chartered from Marine Projects Rotterdam. A total of 79 CPTs (including 13 repeats) and 76 vibrocores (incl. 10 repeats) were completed between 20 September and 5 October 2013. The approximate water depths ranged from -3 m LAT near shore to +48 m LAT at the WOW03 site. Various seabed features, including mega ripples and sand waves, were present on the seabed. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Surface positioning of the vessel was achieved using two identical Veripos LD2 GPS systems with ‘Ultra’ Precise Point Positioning solution. These units were configured to receive corrections from different geostationary satellites thus making them truly independent for effective redundancy. The Veripos Ultra solution has a quoted horizontal accuracy of 0.1m. The CPT and vibrocore locations were positioned subsea using an AppliedAcoustics Nexus EasyTrak USBL system with a transponder attached to a known position on the top of the CPT frame / vibrocorer. For sites where the water depth was too shallow to use subsea positioning effectively, the coordinates were determined by applying a fixed offset from a known control point on the vessel to the CPT/vibrocore deployment location. This method was believed to have an accuracy of around ±1m, because there was little deviation of the CPT/vibrocore from the vertical position of the crane wire, and was used at sites WE45, WE47, WE48 and WE49. To minimise settlement of the CPT rig in areas of soft sediment, hinged footplates were mounted on the frame to increase the footprint and spread the load. In order to measure any settlement of the CPT rig that occurred in spite of the mitigation measures, an altimeter was mounted on the frame at a known height of 2.27m above the base. The altimeter was monitored in real-time as the CPT rig was lowered onto the seabed. An initial reading was recorded when the CPT was landed on the seabed, and a final reading was recorded prior to recovery to deck. In both cases the settlement was calculated by subtracting the observed altitude from the altimeter offset of 2.27m. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Sedimentary structure |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Geological sample density | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Geotechnics | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Pre-Construction engineering | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Renewable Energy Lease area | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Offshore Cable Corridor | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Soil | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Elevation | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 54.2483 |
| East | The eastern-most limit of the data resource in decimal degrees | -2.7561 |
| South | The southern-most limit of the data resource in decimal degrees | 53.7316 |
| West | The western-most limit of the data resource in decimal degrees | -3.852 |
| Responsible organisations | ||
| Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
| Organisation name | The Crown Estate | |
| Phone | +44 020 7851 5000 | |
| enquiries@thecrownestate.co.uk | ||
| Role | The custodian is the person or organisation that accepts responsibility for the resource and ensures appropriate care and maintenance. If a dataset has been lodged with a Data Archive Centre for maintenance then this organisation is be entered here. | custodian |
| Organisation name | The Crown Estate | |
| Phone | +44 020 7851 5000 | |
| enquiries@thecrownestate.co.uk | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | N-Sea Survey BV | |
| info@n-sea.com | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | The Crown Estate | |
| Phone | +44 020 7851 5000 | |
| enquiries@thecrownestate.co.uk | ||
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | Orsted | |
| Customer-questions@orsted.com | ||
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk/details/TCE-2221/summary |
| Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk | |
| Dataset constraints | ||
| 20.1 Limitations on Public Access - Access constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 20.2 Limitations on Public Access - Other constraints | There will be no limitations when published on the Marine Data Exchange | |
| 21.1 Conditions for Access and Use - Use constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 21.2 Conditions for Access and Use - Other constraints | This states any constraints on use of the data. Multiple conditions can be recorded for different parts of the data resource. If no conditions apply, then `No condtions apply` is recorded. This uses free text. | Data Must be used in accordance to the Marine Data Exchange's Terms of Use: https://www.marinedataexchange.co.uk/content/info/terms-of-use |
| Version info | ||
| Date of publication | The publication date of the resource or if previously unpublished the date that the resource was made publicly available via the MEDIN network. | 2021-05-17 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-12 |
| Metadata date | The date when the content of this metadata record was last updated. | 2026-03-27 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 3.1.2 |