The Wrexham Gas Fired Generating Station Order 2017

Articles 2 and 3

SCHEDULE 1 AUTHORISED DEVELOPMENT

In the County Borough of Wrexham—

A nationally significant infrastructure project as defined in sections 14 and 15 of the 2008 Act comprising—

Work No. 1A development comprising—

(a) one gas turbine building with up to two gas turbines, and one steam turbine building with one steam turbine, each connected to its own generator with a gross rated electrical output of up to 299 MWe;

(b) up to two exhaust gas emission flue stacks;

(c) up to two Heat Recovery Steam Generator buildings with up to two Heat Recovery Steam Generators (HRSG’s);

(d) air cooled condenser; and

(e) switchgear room.

Work No. 1B development comprising—

(a) a workshop;

(b) telemetry apparatus;

(c) auxiliary distilled fuel oil generator; and

(d) a natural gas pressure regulating installation (PRI) (also known as a gas receiving station and gas treatment compound) within the power station complex containing—

(i) full bore 400mm nominal bore manually and remotely actuated isolation valves;

(ii) bypass valves, slam-shut valves, creep-relief valves and pressure reduction valves;

(iii) gas filters;

(iv) liquid separator;

(v) up to two 100% gas heaters (bath water type);

(vi) gas meter(s);

(vii) non-return and relief valves;

(viii) control and instrument kiosk;

(ix) electricity supply kiosk;

(x) a section of isolated pipe suitable for receiving a pressure inspection gauge (PIG) (also known as PIG launching/receiving facility); and

(xi) high pressure steel pipeline with a nominal bore of 400mm.

Work No. 1C development comprising—

(a) a water treatment system;

(b) a raw/fire water storage tank and up to two water storage tanks; and

(c) an above ground foul water pump station.

Work No. 1D development comprising—

(a) a 132kV switchyard containing plant required to manage the transmission of electricity into the distribution network; and

(b) up to three transformer compounds with up to three transformers.

Work No. 1E development comprising an administration/control building.

Work No. 1F development comprising a heat network interface building.

Work No. 1G development comprising—

(a) security infrastructure, including cameras, perimeter fencing, fencing, gate and a gatehouse;

(b) site lighting infrastructure, including perimeter lighting columns and lights;

(c) internal roadways, car parking, pedestrian network, cycle parking and hardstanding;

(d) foul, surface water and trade effluent drainage (including underground pipework and access chambers);

(e) waste management infrastructure;

(f) electricity, water, wastewater and telecommunications and other services;

(g) site preparation works including earthworks and enabling works and tree removal;

(h) high voltage and low voltage cabling, equipment and controls and associated telemetry and electrical protection auxiliary cabling;

(i) part of underground gas pipeline connection;

(j) other ancillary equipment; and

(k) construction compound.

Work No. 2A development comprising temporary construction laydown and car parking area comprising—

(a) fencing;

(b) tree removal;

(c) lighting infrastructure including lighting columns and lighting;

(d) concrete batching plant;

(e) signage;

(f) security kiosk;

(g) weighbridge;

(h) staff welfare cabins; and

(i) site preparation works including earthworks and enabling works and tree removal.

Work No. 2B development comprising—

(a) creation of a construction laydown and car parking area comprising—

(i) fencing;

(ii) tree removal;

(iii) lighting infrastructure including lighting columns and lighting;

(iv) concrete batching plant;

(v) signage;

(vi) security kiosk;

(vii) weighbridge;

(viii) staff welfare cabins; and

(ix) site preparation works including earthworks and enabling works and tree removal; and

(b) an operational and maintenance laydown area comprising—

(i) hardstanding;

(ii) lighting columns and lights; and

(iii) fencing.

Work No. 3 development comprising—

(a) surface water drainage comprising—

(i) underground pipework;

(ii) access chambers; and

(iii) outfall to Redwither Brook;

(b) tree removal;

(c) landscaping and ecological mitigation; and

(d) construction and maintenance of up to three surface water retention pond(s) providing a total minimum capacity of 2,085m3 and vortex flow control to limit the discharge rate to a maximum of 12.2 litres per second.

Work No. 4 development comprising landscaping, bunding, fencing, boundary treatments, tree planting, habitat creation and ecological mitigation.

Work No. 5 development comprising the alteration of the existing access road to Kingmoor Park, off the east side of Bryn Lane including levelling, regrading and resurfacing,

and such other ancillary buildings, structures, works or operations as are integral to and part of the construction, operation and maintenance of the works in this Schedule 1 but only within the Order limits and insofar as they are unlikely to give rise to any materially new or materially different environmental effects from those assessed in the environmental statement.