Chelsea to Battersea Tunnel and Gas Pipeline

Barhale carried out work on the new Chelsea to Battersea gas pipeline. As part of the ongoing work to replace and upgrade large diameter gas mains throughout central London, a new gas pipeline was required underneath the River Thames between the Royal Hospital Chelsea and Battersea Park.

The overall project was split in to two separate contracts, both of which were awarded to Barhale:

Contract 1: Construction of two shafts, connected via a new tunnel
underneath the River Thames, which would facilitate the installation
of the new 600mm diameter gas main. This contract was delivered to

Contract 2: Installation of the 600mm diameter, welded steel pipeline
through the tunnel. Including the installation of several governors
and the connection of the new pipeline into the existing network. This
contract was delivered directly to Cadent Gas Ltd.

Kilmarnock Phase 1

Barhale were engaged to provide civils work to facilitate upgrades to the existing Kilmarnock South Substation which could no longer provide sufficient capacity. The existing substation was located to the South of the town of Kilmarnock, East Ayrshire, and consisted of 400/275/132kv compounds.

Phase 1 of the works consisted of construction and installation of 360 reinforced concrete foundation bases and approximately 2000m of concrete cable trough. These foundations were for a variety of structures such as a new transformer bund and base, GIB structures, breakers, height restriction barriers and new fencing.

Chipperlaigan GIB Substation

Barhale’s team in Scotland successfully delivered all civil works,
including a new access road and substation platform, at the new
Chipperlaigan GIB compound in Ayrshire, Scotland for Iberdrola
Engineering and Construction.

The works were required to facilitate Iberdrola’s need to upgrade
their Kilmarnock to Coylton circuit. This overhead line cable circuit
runs north to south between Kilmarnock and Coylton with a ‘tee’
connection at the Chipperlaigan site, which enables the circuit to link
to the town of Ayr in the west. To accommodate a required increase
in load flow, the existing cable at Chipperlaigan was replaced with a
275kV Gas Insulated Busbar (GIB) arrangement.

Galawhistle Control Building

To facilitate a grid connection for a proposed wind farm, Barhale were
tasked with the construction of a new substation control building and
associated civil works. Works took place to the west of the village of
Douglas in South Lanarkshire.

The new substation control building was a single story steel portal
frame structure, which was constructed on top of a reinforced
concrete floor slab. External facing bricks were constructed to a
defined level, in front of which an insulated aluminium cladding
façade was attached to the frame to provide the external walls. The
same cladding was attached to the top of the steel portal frame to
construct the roof structure.

Westerdod 132kV Substation

To facilitate the connection of the new Aikengall II Windfarm, the existing Crystal Rig 400/132kV Substation in East Lothian needed to be extended. This was done through the construction of a new 132kV substation at Westerdod and the installation of a 132kV cable between both substation sites. Barhale were engaged by Iberdrola Engineering and Construction (IEC) to deliver a new control building and all associated civil works.

The Barhale team were tasked with delivering all civil works associated
with the new 132kV substation; prior to the installation of all electrical
equipment by a third party ‘Balance of Plant’ contractor.

INTU Lakeside Enabling Works

To facilitate a new 225,000 square foot extension to the INTU Lakeside shopping centre in Essex, Barhale were required to divert existing utility services away from the new building footprint by carrying out extensive open cut excavation.

The new extension will act as a focal point for the shopping centre, housing numerous leisure facilities including; a bowling alley, various food and drink outlets and an interactive family entertainment centre.

There were three existing services, which clashed with the footprint of
the new building:
• Potable water main
• Gas main
• HV electricity ducting