Project Summary
Coffey delivered the R402 Enfield to Edenderry Road Improvement Project for Kildare County Council. The works involved the construction of 11 km of realigned single carriageway along the R402 regional road between Enfield and Edenderry in County Kildare, enhancing safety, efficiency, and connectivity on this busy route. The project required a combination of online and offline improvements, realignment of side junctions, and the construction of a new roundabout at Carberry Village, all while managing environmentally sensitive areas and maintaining traffic flow.
Project Description
The project involved the construction of a new carriageway, generally 7.3 m wide with 2.5 m hard shoulders and 3 m verges, reduced in width in village areas due to physical constraints. Works included both online and offline realignments, reconstruction of side junctions, and integration of a new roundabout where the new alignment crossed the existing R402. Proximity to Carbury Bog and watercourses feeding into the River Boyne and River Blackwater required careful environmental management and coordination with relevant agencies.
Coffey carried out the majority of works using directly employed staff, plant, and equipment, with subcontractors engaged for macadam surfacing, white lining, and public lighting connections.
Scope of Works
The works included:
- 10 new concrete culverts, including two major stream replacements with environmental controls approved by Inland Fisheries Ireland.
- Over 23 km of drainage pipes and 10 stormwater attenuation ponds with a combined storage capacity of 7,700 m³.
- Installation of 10 km of PE water mains, 5 km of ductile iron water mains, and 40 km of ducts for telecoms and electricity.
- Traffic management on a live route carrying 5,600 vehicles daily, using methods such as single-lane shuttling, convoy working, and speed limit reductions to avoid road closures.
- Fencing, noise barriers, safety barriers, signage, lighting, and accommodation works, including property and land access.
- Demolition of dwellings, outbuildings, and other redundant structures.
Technical Highlights
- Designed and installed a comprehensive drainage system to protect sensitive watercourses.
- Constructed major culverts using precast concrete box sections, reinforced headwalls, and gabion mattresses.
- Delivered complex utility diversions and new installations under a dedicated utility coordination role.
- Implemented tailored traffic management strategies overseen by qualified safety personnel.
Added Value
- Maintained full traffic flow without any road closures.
- Maximised reuse of materials on site to reduce waste and costs.
- Coordinated closely with environmental agencies to protect sensitive habitats.
- Delivered the project to programme and specification.
Environmental, Safety or Community
- Robust environmental protection measures for Carbury Bog and nearby rivers.
- Stormwater attenuation ponds designed to reduce flood risk and protect habitats.
- Compliance with Inland Fisheries Ireland requirements for in-stream works.
- Continuous stakeholder engagement with landowners, utility providers, and local authorities to minimise disruption.
To learn more about Coffey’s work in active travel and urban infrastructure, or to discuss future opportunities, please contact us at 091 844356 or info@coffeygroup.com.
