BSG have completed the Design and Build Construction or Build only of numerous of sea outfalls.
We have gained experience dealing with Crown Estates, Commissioners of Irish Lights, NIEA Marine Construction Licence section, and have liaised with fishermen, the public and other interested bodies through our public relations department.
Benone Area SS
This project involved the installation of a new 300mm diameter outfall pipe into the North Channel at Magilligan Point as part of the Benone Area SS. The work was completed in a Special Area of Conservation and an Area of Special Scientific Interest under strict controls identified within the Marine Construction Licence issued by NIEA in relation to the works. Specialist offshore equipment and divers were utilised to complete the installation with minimal disturbance to the sea bed and the environmentally sensitive area.
This project involved the installation of a new 630mm OD HPPE pipe 133m into the sea at Kilkeel. The work also included the provision of a discharge point with tide flex valve and marker buoy. Additionally we constructed 450m of 600mm Concrete pipe with manholes on the Beach parallel to the sea.
The work was completed under strict controls identified within the Marine Construction Licence issued by NIEA in relation to the works and with approval from Crown Estates
Ballymartin Sea Outfall
This project was part of an overall scheme which included the construction of new pump stations at Ballymartin and Blackrock and included 6.1km of rising main that discharged at Kilkeel treatment works. Work was also completed to improve and extend the existing gravity network.
As part of the scheme the existing overflow pipe and sea outfall were upgraded.
To this end we constructed and installed a new 300mm PE outfall pipe which was encased in a 525mm diameter concrete pipe 145m into the sea at Ballymartin. The annuals of the pipes were filled with concrete.
The outfall pipe starts as a buried pipe from an existing manhole chamber; it crosses the existing roadway and is laid in the beach on the line of the disbanded outfall pipe. A tide flex valve was fitted at the end of the pipe; this work was completed by divers. The beach was then reinstated; minimal disturbance was made to the sea bed of this environmentally sensitive area.