I'm trying to build up costs for the installation of 4 x DIA 900mm HDPE pipelines, PN6.4, SDR26, PE100 from the shore into the sea for 1100m in dregded trenches. Installation shall include all material to bury and anchor on shore and to screens underwater the pipes. I'm wondering if someone can support me with an estimate of time and costs (equivalent standard manhours direct and indirect shall be sufficient) for the installation works and if it is possible a description of activity execution plan with equipment and organisation needed. We are in shallow water with pipe installation at 2.5m from 0 to -10m. Those are the only info I have and I can supply. Thanks for your support.
Luigi