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 involved 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
- We have finished laying the offshore HVAC cables and are now burying them.
- To prepare for the arrival of the HVDC cables we are digging a trench in the intertidal area at Monks Hill Beach.
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
- Fencing is in place on the beach and pink buoys are positioned on the water around our jack up barges, the C57 Red Squirrel and C59 Emotion, to mark our working construction area. There are 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. These vessels are expected to depart in WC 9/9/19.
- The CAPALL MARA (shown below) will arrive on site shortly for trenching work associated with the HVDC cables. We will be working up to 2km from shore with the CAPALL MARA and will share further details shortly. The HVDC cable pull is scheduled for mid-October after CAPALL MARA has completed trenching works.
- We have site hoardings around the area to the south of Crofton Avenue which is the main access for our construction traffic down to Monks Hill Car Park.
- We have completed the installation of sheet piling off Monks Hill Beach. We aim to finish trenching work there by mid-September and will then return the beach to its original condition.
- We have temporarily diverted the public footpath from the car park to The Shack café while we excavate trenches underneath the footpath route. The temporary footbridge in place as part of the diversion will be removed in WC 9/9/19.
- We are burying the six HVAC cables between Monk’s Hill Beach and Chilling using the JIF ARTEMIS and GREEN QUEST (safety vessel). We expect to complete this work in November.
- The current position of our vessels can be tracked on the MarineTraffic.comtool on the Offshore Cable section of this site.
C57 Red Squirrel
The CAPALL MARA
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: Wednesday, September 4, 2019