Heavy duty silt curtains

By nils@undervannsarbeid.no

For the construction of Norways longest Railway Bridge, Waens installs heavy duty silt curtains that withstand ice, currents and wind. Environmental authorities often require silt curtains for construction work in sea, lakes and waterways. All too often, one sees that the most common prefabricated silt curtains cannot withstand  currents, strong winds or ice and end…

Norways largest silt curtain

By nils@undervannsarbeid.no

Waens is building 45000 m2 silt curtain in Frier Fjord, Norway. In Frierfjorden in Telemark, Norway, a large new industrial and port area is being developed on Frier Vest. Waens has been commissioned by the main contractor Hæhre to protect the Frierfjord against particle dispersion from the filling with 45,000 m2 of silt curtains placed…

Marine services for 170kV power supply

By nils@undervannsarbeid.no

Waens takes on all handling on sea and contain pollution by silt curtains. This year, the Herøya industrial area received a new power supply of 170 kV via a river crossing carried out by directional drilling under Porsgrunnselva river. The cables were pulled through 5 pcs Ø225 PE pipes. It was these pipes that Steg…

Marine infrastructure works

By nils@undervannsarbeid.no

Waens working with subsea pipelines and threncing in lake Mjøsa, Norway Waens main work area is protection of marine environment, but the knowledge and experience of our staff can also be useful in marine  construction.  In this case, establishing subsea pipelines for a new housing development project in Kapp by the lake Mjøsa.  The scope…

Bubble curtains as sediment barrier

By nils@undervannsarbeid.no

The Port of Drammen is expanding the port and Waen’s bubble curtain will stop particle dispersion from the construction. Most cars that arrive in Norway are unloaded at the Port of Drammen. The port is therefore embarking on a major development of the Holmen area in the middle of Drammenselva’s outlet. As a measure against…

Bubble curtains kills underwater noise

By nils@undervannsarbeid.no

Test installations of bubble curtains showed massive noise reduction from underwater blasting with charges up to 1800 kg TNT. The Norwegian Coastal Administration; Kystverket, had decided to do scientific testing of the effects of bubble curtains on underwater noise.  They did the testing in connection with real life underwater blasting works in the harbour of…