Our HVAC and HVDC cables will connect to the Converter Station, the route from Monks Hill Beach to the Converter Station involves the installation of the cables onto Solent Airport.
Work on the airfield during 2018 and early 2019 will involve excavation of trenches and joint bays, installation of ducts for the cables in the trenches, backfilling and reinstatement. Installation of the cables and jointing works will follow on from this work during spring and summer of 2019.
In October 2017, National Grid IFA2 undertook EMF trials on Solent airport. Using AC and DC cable systems installed and energised in the configuration and current rating reflecting the actual conditions in service. This was to verify compliance with the planning conditions and that there was no interference with aircraft avionics.
All participants, including airfield users confirmed that:
- During the trials all aircraft systems functioned as normal
- There were no anomalies observed on any of the aircraft avionics
- Magnetic compass deviation was temporary and minor
- For more information on Solent Airport please visit www.solentairport.co.uk
- Until April 2019 we will be digging the trenches to install the ducts for the cables. These will be completed in 50 -100m sections.
- We are currently installing ducts above Monk’s Hill beach and are welding pipe sections which will carry the cables in the cable ducts.
Monks Hill Beach
This is where both the HVAC and HVDC cables will come onshore. All work will take place within a compound in the eastern part of the car park. We’ll access this using a purpose-built haul road through a field to the north of the car park. This will mean full public access to the western part of the car park; the beach and the beach huts are preserved throughout the construction period.
Our work will consist of the excavation of trenches to install the cable ducts, backfilling and reinstatement and the construction of 3 transition joint bays in the car park which will be backfilled and reinstated after completion of the jointing works.
When carrying out this work we will:
- Ensure the working areas are safely segregated from the public
- Complete the beach works and work within the eastern car park area within one season (2019)
- Maintain access to the western section of the car park ensuring that access to all beach huts is maintained.
Monks Hill Beach information poster
HVAC vessel work areas
- We have established site hoardings and a stoning the area to the south of Crofton Avenue which is the main access for our construction traffic down to Monks Hill Car Park.
- Fencing will be put up on the beach in front of these hoardings next week for approximately two months. Access along the car park from East to West, and to The Shack, will be maintained. This fencing marks our working area for excavating trenches for the interconnector cables. Pink buoys will mark our working area on the water. There will be open excavations and obstructions under the water and the area is therefore restricted for your safety. Please do not enter this restricted working area on the beach or in the water. For more information please see the poster above.
- Excavation work for cable duct trenches is under way behind our hoardings at Monks Hill Car Park.
- Our jack up barge, the C59 Emotion, will be arriving from Southampton and will be visible from the beach as it carries out work in the water off Monk’s Hill car park. The working area for this barge is marked by buoys and will be patrolled by safety vessels for your protection; please avoid this active working area.
- The NP 289, our cable laying barge will be moving between Monk’s Hill Beach and Chilling to lay the six HVAC cables from late May for approximately two months. The vessel’s working and anchor areas will be marked by buoys to create a safety zone for your protection. The barge moves on anchors; its route and the anchor point areas are shown in the chart above. Please be vigilant on the water and avoid this working area.
Chilling is the point that IFA2 will connect to the electricity transmission network. We are laying cables from the shore area to an existing National Grid facility on Chilling Lane.
We have used a technique known as Horizontal Direct Drilling (HDD) to install cables in the shore area. This involves drilling underground and installing a series of ducts, which we then pull the cables through.
Elsewhere, we will dig trenches, bury the ducts, reinstate the ground, and pull the cables through. In all cases, the cables will not be visible when we have finished. For further information on NGET and the work at Chilling please visit: https://www.nationalgridet.com/infrastructure-projects/ifa-2-connection
To reduce the impact of our project traffic in the area we will do the following:
- Impose a 10mph speed limit for construction vehicles through Hook Village
- Escort any HGVs moving through Hook Village
- Brief drivers about Chilling Lane’s use as a footpath and cycleway
- We have now completed the crossings over Chilling Lane and Workmans Lane.
- We returned to site in mid-March after a shutdown period to protect overwintering birds.
Last updated: Thursday, April 4, 2019