Construction work for highways, roads

Tender description

The proposed works include: — construction of a new 2-span bridge over N3 with pile foundation immediately adjacent to existing Snugborough road bridge inclusive of footpath and cycle track. — construction of a new 2-span pedestrian/cyclist bridge (with potential vehicle loading) with pile foundation to the north of Snugborough road. — construction of 2 new pedestrian underpass. The proposed works include: — construction of a new 2-span bridge over N3 with pile foundation immediately adjacent to existing Snugborough road bridge inclusive of footpath and cycle track, — construction of a new 2-span pedestrian/cyclist bridge (with potential vehicle loading) with pile foundation to the north of Snugborough road, — construction of 2 new pedestrian underpass. One underpass is located to the north of existing pedestrian underpass, and another underpass is located 30 m south of the re-aligned N3 on-ramp, — construction of reinforced earth wall, — contractor designed elements to include design of precast concrete underpass structures, reinforced earth walls, and bridge beams, — modify existing bridge to one-way traffic flow southbound, — remove and replace existing bridge parapet with class H2 parapet, — 9C main sewer diversion, with peak flows over 1000l/s. Works include construction of approximately 150 m of new 1.2 m dia new sewer line, constructing new chambers, modification of existing chambers and constructing chamber on existing sewer line. Over-pumping works will be required, — lane widening of the Snugborough Road northeast and southwest approaches to the interchange, — lane widening of the L3020, Blanchardstown Main Street (R806) and N3 On-Ramp, — realign the N3 eastbound on ramp, — upgrade Waterville roundabout into a signalised junction, — provision of improved cyclist and pedestrian facilities, — 500 mm dia AC watermain diversion, — utilities diversion including BT, Eir, Irish Water, Smart Telecom, Virgin Media, gas distribution main, — drainage works including construction of detention basin, and underground water attenuation tank, — provision of public lighting, signage, CCTV road lining and landscaping associated with the above works.