Contract - 420768 Fossumdalen stage 5-6, Pipeline route.

River Nidelva from the sewage network by establishing a separated main stem for W&S from the sewage zone Lerkendal where surface water is led to the River Nidelva, and waste water is fed by a self-fall to Høvringen treatment facility. In "Fossumdalen stage 5-6, Ledningstrasé", the existing overflow

(OP04) shall be established in "Fossumdalen stage 4" connects to the Høvringen sewage tunnel via a diving pipeline under the River Nidelva with a flushing magazine. The pipeline installation starts with drilling rock from the west side of