II.2.1) Teitl

Lot 1 - Intrusive Marine Ground Investigation 2024 - Tipner West Regeneration Project

II.2.2) Cod(au) CPV ychwanegol

45111250

45120000

71351100

71351200

71351500

71351720

71351913

71351924

71510000

71621000

71900000

II.2.3) Man cyflawni

Cod NUTS:

UKJ31

Prif safle neu fan cyflawni:

Portsmouth Harbour, Tipner West, Horsea Island - Portsmouth

II.2.4) Disgrifiad o’r caffaeliad

The GI works period is significantly constrained by bird migration and breeding patterns meaning that works may only commence from April 2024 and must be complete by July 2024.

It should be noted that this works period may be subject to review and as such the Council will require flexibility from the appointed contractor in the event that these dates need to be moved forward or backwards.

The ground investigation will comprise overwater investigations in the Dredged Channel area.

The Works are to be undertaken predominately on the Intertidal Zone and within the existing SSSI and SPA. As such all works will therefore need to be undertaken in a highly controlled manner to avoid impacts to Marine Ecology. An MMO application for the GI Works has been submitted by WSP.

The Ordnance Survey National Grid Coordinate for the centre of the Site is 463378E 103291N.

SCOPE

The ground investigation will comprise overwater investigations.

The contractor will be responsible for determining that each exploratory hole location is safe for the temporary founding of the jack up legs and for clearing each jack up leg and exploratory hole location of the presence of any UXOs. The scope of the investigation will be as follows:

 Six overwater Dynamic Sample / Rotary Cored boreholes to approximately 8 metres below bed level (m BBL) along the proposed land reclamation boundary.

 Six Cone Penetration Testing (CPT) overwater to refusal with Unexploded Ordnance (UXO) clearance to 8 m bbl. Alternative methods can be proposed to clear each borehole for UXO, however CPTs would still be a preference.

General

The above scope will also require:

• Onsite inspection and logging of samples;

• In-situ testing in boreholes;

• Chemical and geotechnical sampling in exploratory holes;

• Laboratory geotechnical testing of soils and rock and chemical testing of soil and groundwater samples; and,

• UXO survey of all overwater exploratory holes prior to intrusive works.

Reports

The Principal Contractor is only to prepare the specified factual part of the Ground Investigation Report.

One factual report will be required and named as follows:

• Tipner Dredged Channel

II.2.5) Meini prawf dyfarnu

Nid pris yw’r unig faen prawf dyfarnu a dim ond yn y dogfennau caffael y mae’r holl feini prawf wedi’u nodi

II.2.6) Gwerth amcangyfrifedig

Gwerth heb gynnwys TAW: 450 000.00 GBP

II.2.7) Hyd y contract, y cytundeb fframwaith neu’r system brynu ddynamig

Hyd mewn misoedd: 4

Gall y contract hwn gael ei adnewyddu: Na

II.2.9) Gwybodaeth am y cyfyngiadau ar nifer yr ymgeiswyr a gaiff eu gwahodd

II.2.10) Gwybodaeth am amrywiadau

Derbynnir amrywiadau: Na

II.2.11) Gwybodaeth am opsiynau

Opsiynau: Na

II.2.13) Gwybodaeth am Gronfeydd yr Undeb Ewropeaidd

Mae'r broses gaffael yn gysylltiedig â phrosiect a/neu raglen a ariennir gan gronfeydd yr Undeb Ewropeaidd: Na

II.2.1) Teitl

Lot 2 - Non-Intrusive Marine and Unmanned Aerial Vehicle Surveys 2024 - Tipner West Regeneration Project

II.2.2) Cod(au) CPV ychwanegol

71352000

71354500

II.2.3) Man cyflawni

Cod NUTS:

UKJ31

Prif safle neu fan cyflawni:

Tipner West, Portsmouth

II.2.4) Disgrifiad o’r caffaeliad

The Non-Intrusive Marine and UAV Surveys are not time constrained and may commence from contract award and must be complete as soon as possible, but by April 2024 at the latest.

It should be noted that this works period may be subject to review and as such the Council will require flexibility from the appointed contractor in the event that these dates need to be moved forward or backwards.

A Stage 1 Geotechnical Investigation (GI) was carried out in 2021 and included a suite of Magnetometry/Side Scan Survey and Bathymetry surveys for UXO and archaeological purposes. The proposed marine surveys are required to extend to those areas not covered in the 2021 surveys.

The non-intrusive Marine and UAV Surveys contractor will be required to survey the proposed Dredge Channel, situated within and north of the Tipner channel, between Tipner West and HIE, the proposed survey buffer comprises 26.5 ha and is approximately centred at National Grid Reference (NGR) 463755 103729. This survey area will likely require a combination of marine and UAV surveys.

II.2.5) Meini prawf dyfarnu

Nid pris yw’r unig faen prawf dyfarnu a dim ond yn y dogfennau caffael y mae’r holl feini prawf wedi’u nodi

II.2.6) Gwerth amcangyfrifedig

Gwerth heb gynnwys TAW: 75 000.00 GBP

II.2.7) Hyd y contract, y cytundeb fframwaith neu’r system brynu ddynamig

Hyd mewn misoedd: 2

Gall y contract hwn gael ei adnewyddu: Na

II.2.9) Gwybodaeth am y cyfyngiadau ar nifer yr ymgeiswyr a gaiff eu gwahodd

II.2.10) Gwybodaeth am amrywiadau

Derbynnir amrywiadau: Na

II.2.11) Gwybodaeth am opsiynau

Opsiynau: Na

II.2.13) Gwybodaeth am Gronfeydd yr Undeb Ewropeaidd

Mae'r broses gaffael yn gysylltiedig â phrosiect a/neu raglen a ariennir gan gronfeydd yr Undeb Ewropeaidd: Na

II.2.14) Gwybodaeth ychwanegol

SCOPE

The appointed contractor will be the Main Contractor responsible for providing all boats, equipment, welfare for the purposes of undertaking the survey, and is also responsible for obtaining any necessary permits, undertaking the surveys and providing reports.

The following survey types are required:

Side scan sonar (SSS)

Multi beam echo sounder (MBES)

Marine Magnetometry Survey (Mag)

Flown Marine Magnetometry Survey (Mag) (If required),

The High Court of Justice

The Strand

London

WCA 2LL

UK

Ffôn: +44 2079476000