Over the years, Kaymac Marine & Civil Engineering have gained valuable experience in the inspection, repair and full installation of sea outfalls across the whole of the UK, for a wide variety of clients. Kaymac Marine have sourced the very best plant equipment and personnel to enable us to offer a complete outfall solution to our customers which can not be found anywhere else.
We have gained valuable working knowledge of various working processes, installation plant, equipment & materials, which has enabled us to programme and deliver projects to strict timescales and budgets.
The Parrog Project (Morgan Sindall)
Firstly please take a look at the video below which shows an outfall installation project that we carried out in Parrog, West Wales, for Morgan Sindall on behalf of DCWW. This was a particularly sensitive area as, not only was it within the National Park, it was a SSSI site and a blue flag bathing beach. The only vehicular access to site was through the small nearby village of Newport.
Although the long sea outfall was universally considered necessary in order to further improve water quality in the bay, it naturally raised many concerns among local residents and the wider population. Kaymac's project team listened to these issues and worked closely with residents and the client to allay any concerns.
The accepted method of transporting and installing the 650m HDPE pipe was to transport it by truck in over 100 lengths of 6m pipe and then fusion weld the sections on site, in this case, the beach.
With careful planning and consultations with a Norwegian supplier, the pipeline was sourced, fabricated to the required design and delivered via a tug boat from Norway to Fishguard Harbour (over 960 nautical miles), to await the necessary preparatory works required by the design. Once delivered, the pipe was split into 3 lengths- 550.0m, 53.0m and 27.0m. Over 200 No. Pre-cast concrete collars each weighing 320 kg, were individually attached to the pipe by Kaymac operatives and steel sinking lids were fixed to the open pipe ends. These sinking lids included fixed valves, which allowed Kaymac to control the influx of water and air into the pipe during the sinking procedure.
Kaymac's experience in the marine environment allowed the design to be reviewed with regards to its 'buildability' and being able to source and transport the required materials to the site. The design was altered so that the original scope of importing thousands of Tonnes of rock as backfill material could be replaced with the use of pre-cast concrete weight collars and mattresses that would be fitted to and around the pipeline, with the pipe being laid in a deeper excavation as to what was originally proposed- Thus providing a more cost effective and environmentally friendly solution.
A number of our other outfall projects can also be seen below.
Kaymac Marine & Civil Engineering were commissioned by Morgan Sindall Plc to assist with Early Contractor Involvement to aid in the design and installation of a new 642m long outfall pipe in the Village of Parrog, Pembrokeshire.