The Contractor continued with marking (setting out) of tunnel walls that began in February and continues. This is for the installation of overhead equipment including cable ladder, tunnel lighting, CCTV, traffic signs, radio antenna, fire detection sensor and other devices. Installation of HDPE conduit supports under the tunnel walkway continues. There are some deficiencies in these installations and are being addressed by Contractor. Electrical conduit works installations in outside areas at the South Toll Plaza building continues. Conduit support anchoring began on southern bridges in late April. A small amount of conduit and earth wire has been installed at the Ventilation Adit Building (VAB) and Vehicle Maintenance building (VMB). Design work at site has been the preparation and submittal of installation shop drawings. Detailed design continues in ABB Finland on systems (Fire alarm, communications, radio rebroadcast, traffic control, lighting control and main SCADA systems) and systems integration.

PKIII continues to participate in the hand over of sections of walkways and east side duct banks in the tunnel from the civil contractors. The hand over allows PKIII (and PKIV) access to install conduit in the trench under the walkways.

Coordination is still ongoing between PKIII and PKIV for space, and cableway requirements in the Electrostatic Precipitator areas (S/S 1, 2 and 4). This is primarily cable ladders from substation area to EP layby areas and tunnel crossings near PKIV high level air ducts. The substation layout for construction at the north portal plaza, S/S#5, has been handed over to PK1A. PK1A is responsible for construction of that substation.

The Engineer identified the North and South portal plaza areas as critical civil construction areas to enable early installation of main electrical cables and early supply of power for ventilation fan testing. The civil contractors began work in early March (PK1B) and late March (PK1A) in those areas.

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