Most of the older drainage systems in Ireland are Combined Sewers Systems, which were designed to collect both wastewater and storm run off in the same pipes. The Combined Sewer System is designed to overflow during rains and discharge excess wastewater directly to rivers, streams and other bodies of water. This discharge occurs via a Storm Overflow chamber. The location and surveying of these Combined Sewage Overflow ( CSO Survey ) chambers has a very important role to play as a result and in fact form an integral part of any Drainage Area Studies in an area.

USA Ltd. have carried out surveys of the SWO/CSO’s as part of many projects. The survey will generally consist of a survey of the structure itself (condition and operational) and also the route of the overflow pipe to outfall. A CCTV survey maybe required to trace the pipe to the outfall and there will also be a GPS survey carried out to provide the location of all associated assets to Irish National Grid and the provide the invert levels of all associated pipes.

For more information on our SWO/CSO Survey services, contact USA Ltd on +353 45 394010 or info@usa-ltd.ie