Road construction works

Tender description

Realignment of the N56 for 3.15km between Letterkenny and Kilmacrennan, in the townlands of Coolboy, Ballykeernan, Keenaghan, approximately 5km northwest of Letterkenny. The N56 Coolboy to Kilmacrennan Road Realignment Scheme comprises but is not restricted to the following works: The proposed works will involve construction of approximately 3 km of Type 2 Single Carriageway, typically with 2 x 3,5 m carriageway lanes with 0,5 m hardstrips and varying width verges that accommodate a 2 m shared footway / cycle track on both sides of the new N56. The road improvement section will comprise of approximately 2 km online widening and realignment and 1 km offline. The works include the removal of deep peat / soft ground and extensive traffic management adjacent to such excavations. Existing trunk and distributor water mains serving Letterkenny and local needs run adjacent to and along the existing N56. Enabling works include early diversions to these trunk and distribution mains to reduce interference during the main construction activities. This scheme includes 6 nº local road junctions (2 ghost island) and various other access junctions onto the N56 with construction of associated realigned local roads, service roads, culvert crossings and associated earthworks. Various landscaping, environmental and mitigation works. Various accommodation works including access to properties and lands. Various fencing and safety barrier systems. Various road marking and signing. Various works including diversion of assets of utilities and service providers and including new watermains. Various road drainage works including the provision of an attenuation pond, drainage outfalls and pollution control measures. Various pavement construction: Enabling works include: embankment construction, diversion of the existing water trunk and distribution mains and attenuation pond construction.