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N4 Collooney to Castlebaldwin Road Development Project

  • Project Type Roads / Bridges
  • Client Sligo County Council
  • Company Involvement Design and Construction of the Project
  • Form of Contract Public Works Contract for Civil Engineering Works Designed by the Contractor (PW-CF4)
  • Dates January 2019 – July 2021
  • Location This project commences at the southern end of Sligo in the townland of Collooney heading towards Castlebaldwin



Key Features

  • 12.12km of offline realignment from Doorly Td. to Cloghoge Lower Td
  • 2.58km of widening and improvement of the existing N4 single carriageway to a Type 2 Dual Carriageway
  • Major Earthworks including excavation of 700,000m3 peat & silts
  • New side roads and upgrading of existing local roads
  • 1 no. Compact Grade Separated Junction on the mainline, (Drumfin/Cloonlurg Junction)
  • 1 no. at-grade roundabout Junction on the mainline, (Castlebaldwin Junction)
  • 3 no. roundabout Junctions on sideroads
  • 4 no. road overbridges, 6 no. road underbridges, 2 no. river bridges
  • Culverts and associated diversions of existing minor watercourses and drainage ditches
  • All necessary drainage works, diversion of services and utilities, environmental mitigation works and accommodation tracks