Overvann

Maria Feghts gate in Drammen.

See movie with comments from the project director

Here we rerouted the stream. Before, the stream poured into a 530mm concrete pipe located in Maria Feghts St and flowed down to a common conduit and further on down to the sewage treatment plant. Now we have directed the stream into a new pipe 600DV (x-Stream) and further to a sand trap (K6) and on further to (K5) as a self-fall (gravity) or channel flow. K5 is an Aiwell Water full flow tank. In this tank, the flow becomes self perpetuating because of the gravity controlled pressurized system and the water is passed on in 355 PE100 SDR11 pipes to K4 at a much higher speed and in a smaller dimension tube, with an inside diameter of only 290mm. In K4 the water velocity is slowed down and the water goes on to K3 in 600DV (x-Stream) again. Overwater and drain water for the area are introduced into the system at K3. From K3 the water continues running in a 600DV (x-Stream) until it arrives at K2, which is also an Aiwell Water full-flow tank. Here the water continues in 355PE with an internal diameter of 290mm as a gravity controlled pressurized system to K1 which is a huge culvert. With this system, when the stream water is rerouted so that there can be no overflow of sewage into the ocean, the environment is saved.
Additionally, costs are reduced by using trenchless drilling with smaller dimensions. There is also quicksand in the area that would make digging very demanding and risky.

Aiwell Water AS entered into a collaboration with NTNU and Professor Sveinung Sægrov who has been a supervisor of a student in a project assignment. This was very useful for both Aiwell Water AS and the Drammen municipality.

Aiwell Water`s full flow tank in K5