In connection with construction of a new sewage treatment plant, with laying of 6 780 m transmission line from the new pumping station PA130 to the new wastewater treatment plant at Tangen, and 1 400 m of transmission line from Sørumsand to Tangen. The tender includes the delivery and work with laying of the lines. The work also includes connectors, weights, the construction of the terminals for lines from land etc. The current pipeline routes are shown in the overview drawings.

Maximum water depth in the river is about 7 m.

Pipes dimensions and lengths:

Ø450 mm PE100 SDR 11, length = 6 780 m, sewage pump line

PA301-Tangen.

Ø355 mm PE100 SDR 11, length = 1 400 m, sewage pump line

Sørumsand-Tangen.

The lines should be weighed down with concrete weights corresponding to 80 % of the air-fill ratio. The lines are to be laid at the bottom along most of the route. Outside of Tangen, bottom adjustment are necessary over a length of approx. 600 m (PA301-Tangen) and approx. 140 m (Sørumsand-Tangen).