Marine construction works for improving the Inkoo sea route

Summary

The tender concerns a lump-sum general contract for marine construction works. The project includes dredging, disposal works, underwater rock blasting and changes to navigation aids. It is divided into two main contracts: Contract 1 and Contract 2, with Contract 2 split into sections A (Inkoo sea route) and B (Koverhar sea route). The works include deepening and widening sea routes, with about 70,000 cubic metres of dredging and underwater blasting in Contract 1, about 200,000 cubic metres of dredging in Contract 2A, and deepening the Koverhar/Lappohja route from 12 m to a design depth of 14 m in Contract 2B. Some dredged material must be handled separately and placed in basins on the port area for further treatment. The notice says the detailed requirements must be checked in the tender documents.