OCSC was appointed by Fingal County Council to undertake the design, contract administration and site supervision of a major distributor road at Tyrrelstown. The project involved the construction of a section of dual carriageway to connect the M3 and M2 National Primary Routes. The road acts as a relief for the M50 orbital motorway and serves some 260 hectares of zoned land in the administrative area of Fingal County Council. The route joins the R121 at Tyrrelstown to the N2 at the Cherryhound Interchange and comprises approximately 4.5 kilometres of dual carriageway incorporating a central median, two 8-metre wide carriageways, grass margins, footpaths and cycle tracks. Six large diameter (70 m – 80 m) at grade roundabouts are included in the scheme.
The project also included 3 kilometres of 600mm ductile iron water main and 3 kilometres of 300mm main. The project also includes 3.5 km foul drainage along with 8 km of surface water drainage. Two large scale municipal foul pumping stations were also designed by OCSC and constructed a s part of the overall contract. When completely built out the zoned lands have the potential to accommodate close to 15,000 jobs. Part of the works included the widening and realigning of existing roads.
OCSC provided a ‘cradle to grave’ service on the project including Constraints Study, Preferred Route Report, Cost Benefit Analysis, EIS, Compulsory Land Purchase, Detailed Design, Tender Assessment, Contract Administration and Site Supervision.