Blanchardstown Regional Drainage Scheme

Fingal County Council
Blanchardstown Regional Drainage Scheme

This Scheme consisted of following sub-projects:

  • 1)Production of a Drainage Area Plan (DAP) for the contributing catchment's and upgrade to the existing system
  • 2)Duplication of the 9C-trunk sewer and provision of offline storage where required
  • 3)Refurbishment of the River Liffey Siphons
  • 4)Refurbishment of the existing 9C sewer.


In order to produce a drainage area plan the manholes and sewers in the contributing catchments Manhole Surveying and Sewer Surveying needed to be carried out. USA Ltd. carried out 3,800 Manhole Surveys, cleaned 45km of sewer and CCTV surveying of 122 km of sewer as part of this contract. USA Ltd. also collated all information to produce a complete drainage network for all sewers feeding into the 9C Sewer.

The refurbishing of the River Liffey Siphons required a detailed survey of each of these structures to be undertaken. The survey of the 20 structures was undertaken by USA Ltd.. Detailed drawings of the Siphons were produced.

Footage of DRAINAGE AREA PLAN surveyed by USA Ltd, Chapelizod Road

Job Vacancies

We require an experienced sewer relining technician to join our team of highly qualified staff.

Apply now