Unexploded Explosive Ordnance (UXO) marine geophysical survey, identification and disposal at the platform location BorWin gamma in the German sector of the North Sea

Menge oder Umfang

The planned offshore converter station BorWin gamma is part of the transmission link BorWin3. The water depth at the platform location is ~ 40m relative to Lowest Astronomical Tide (LAT).The entire scope of the clearance services encompasses:— Geophysical survey to identify potential UXO objects within the prescribed area that will cover the footprint of the platform, the working area around and anchor areas for the installation spread. Contractor will host a ‘route working group meeting’, which aims at the set-up of the identification and disposal program on-site of potential UXO objects that cannot be avoided. A clearance certificate for areas free of objects has to be issued;— Positive identification of the potential UXO objects resulting from the ‘route working group meeting’ at the platform site;— Where required, disposal to shore of any actual UXO objects if safe to transport or detonation on-site if unsafe to do so. Where required, disposal to shore of any actual non-UXO objects that might hinder any installation works. Issuance of final target clearance certificate (s) for all objects inspected and removed.All work stages have to accompanied by at least 1 qualified EOD supervisor certified according section 20 German Explosive Law (SprengG) per working shift.Geophysical Survey:The geophysical survey will commence with full systems tests and calibrations in port and offshore, and a surrogate item trial on-site in order to prove the survey spread. Only when these are completed and approved shall the geophysical route survey be conducted within the specified area, acquiring multi-beam bathymetry, side-scan sonar, sub-bottom profiler and magnetic gradiometer data.During the survey, all data shall be processed on-site and delivered to the Contracting Entity within 24 hours of completion of acquisition so that decisions regarding data quality, gaps, re-work and development can be made on-site as soon as possible after acquisition. If this cannot be achieved offshore then an onshore data processing facility shall be set up to facilitate data transfer to shore and access to the Contracting Entity.Upon completion of the geophysical survey and prior to the submission of the draft final report, Contractor will host a ‘route working group meeting’ at its premises in order to review the geophysical data and agree with Contracting Entity and its UXO Consultant on the identification and disposal program. The outcome of this meeting shall be a field layout for installation that avoids as many potential UXO objects as possible, a final potential UXO object list for subsequent detailed identification the clearance certificate.The following submissions will be required as a minimum:— Mobilisation report of all tests, calibrations and the surrogate item trial (SIT). Mobilisation shall be complete when all activities are approved by the Contracting Entity;— Daily progress reports to be issued each morning for the previous day's work of an agreed format and content;— Preliminary processed bathymetric, sea-floor imagery, geological profiles and magnetic data within 24 hours of acquisition;— A field operations report shall be issued on completion of completion of the survey at sea, containing as a minimum the preliminary processed survey results and conclusions;— A complete draft final report including the method statements, results, conclusions and data (raw and processed) shall be delivered in German and English within the specified time after completion the survey at sea;— Final submissions in German and English shall be within the specified time after receipt of final comments from the Contracting Entity on the draft final submission.Identification and disposal operations:The phase will only commence with full systems tests and calibrations in port and offshore, and a surrogate item trial on-site in order to prove the working spread. Only when these are completed and approved shall the identification works commence. All objects given in the final potential UXO object list that cannot be avoided shall be inspected preferably by an ROV in order to determine if the object is actual UXO or not. This may require de-burying of the object. Non- UXO items may need to be recovered if they hinder the upcoming installation works. The Contractor will issue a clearance certificate for all objects inspected and identified stating the precise nature of the object if any is found.The following submissions will be required as a minimum:— Mobilisation report of all tests, calibrations and the surrogate item trial (SIT). Mobilisation shall be complete when all activities are approved by the Contracting Entity;— Daily progress reports to be issued each morning for the previous day's work of an agreed format and content;— Target search reports and original clearance certificates within 24 hours of inspection and identification;— A field operations report shall be issued on completion of completion of the survey at sea, containing as a minimum the inspection results, clearance certificates and conclusions;— A complete draft final report including all method statements, results, signed clearance certificates, conclusions and data (raw and processed) shall be delivered in German and English within the specified time after completion the survey at sea;— Final submissions in German and English shall be within the specified time after receipt of final comments from the Contracting Entity on the draft final submission.Disposal Operations (if conducted from a different vessel than the identification works) and Detonation:If conducted from a separate vessel spread to the visual identification works then this phase will only commence with full systems tests and calibrations in-port and offshore, and a surrogate item trial on-site in order to prove the working spread. Only when these are completed and approved shall the disposal works commence. Once a potential UXO target is positively identified as hazardous UXO that cannot be avoided, the Contractor's EOD Manager, who is certified according section 20 German Explosive Law, shall decide whether or not the UXO item can be safely recovered and transported to shore or if has to be detonated on-site. All applicable rules, guidelines, mitigation measures and ordinances will be followed, and appropriate communications with the relevant authorities (BSH, etc.) will be made. Final detonation will only take place when all regulatory permissions and clearances from the authorities and TenneT marine coordination centre are in place. The Contractor will issue clearance certificate for all actual objects cleared.The following submissions will be required as a minimum:— Daily progress reports to be issued each morning for the previous day's work of an agreed format and content;— Target search reports and original signed clearance certificates within 24 hours of disposal.If conducted from a separate vessel spread to the visual identification works, then the following reports will also be required:— Mobilisation report of all tests, calibrations and the surrogate item trial (SIT). Mobilisation shall be complete when all activities are approved by the Contracting Entity;— A field operations report shall be issued on completion of completion of the survey at sea, containing as a minimum the inspection results, clearance certificates and conclusions;— A complete draft final report including all method statements, results, signed clearance certificates, conclusions and data (raw and processed) shall be delivered in German and English within the specified time after completion the survey at sea;— Final submissions in German and English shall be within the specified time after receipt of final comments from the Contracting Entity on the draft final submission.(Mentioned route details and periods are up to further clarification).

Zusätzliche Informationen

Tendering authority will only accept participation requests which are handed in completely and in due time. Participation requests must be handed in via post only to: DC Netz BorWin3 GmbH.

Attention of: PRC-GBC/Jana Gerlach, Eisenbahnlängweg 2a, 31275 Lehrte, Germany.

Tenderer must hand in 1 hard-copy and 1 digitalized copy in a standard format like .PDF on a USB drive or CD. Participation requests transmitted via e-mail are not acceptable and may lead to an exclusion of the concerning attendee.

DC Netz BorWin3 GmbH reserves the right to suspend or terminate the whole tender procedure or a part thereof. Tenderers will not be entitled to any compensation in that event.

DC Netz BorWin3 and all of its affiliates according to the AG §§ 15ff Akt, reserve the right of extension to use this contract.

The time-limit in accordance with § 107 Abs. 3 Nr. 4 GWB is relevant.

DC Netz BorWin3 GmbH receives the right to short-list the number of tenderers during the tendering/negotiation phase, based on the award criteria.

Concerning II.3) Duration of the contract:

This duration is to be confirmed but the following options are considered which may require multi-vessel survey, inspection and disposal spread operations.

Platform site: Approximate duration 2 months commencing 2

(dates/periods are only estimated and non-binding).

Rechtsform der Gruppe von Wirtschaftsteilnehmern, an die der Auftrag vergeben werden soll

In the case of different bidders syndicating to a consortium the client will only accept a joint liability of the consortium. The consortium has to name explicitly consortium leader. Furthermore the bidder constellation and legal construction have to be explained.