badenovaWÄRMEPLUS GmbH & Co. KG intends to expand the district heating network in several districts of Freiburg as part of the "Freiburg-West Heat Network" funding project. The total length of the planned network expansions is around 20 km and is to be carried out over the next few years. The present tender includes a section with a route length of 990 m of the district heating main "Freiburg-Betzenhausen/Mooswald" along Hofacker Straße between Elsässer Str. in the north-east and Sundgauallee in the south-west. The sections adjacent to the two ends will be awarded in separate tenders. Earthworks and pipeline construction works:

Demolition and restoration of surfaces in the area of the pipeline trenches: approx. 1,800 m2

Aushub: approx. 3500 m3

District heating pipeline construction: plastic casing pipe single pipe DN 200/400 approx. 1,040 m route length

Civil engineering and pipeline construction work on district heating:

The laying of pipelines is carried out in an open trench.

Cable length: approx. 1,040 m

Pipeline type: Plastic casing pipe as a single pipe system

Nominal diameter: DN 200/400

Medium pipe: Steel pipe

Thermal insulation: Composite insulation made of rigid PUR foam

Sheath pipe: Plastic (PE-HD)

Transport medium: water

Nenndruckstufe: PN 16

Operating temperature flow: 95 °C

Operating temperature return: 55 °C

Network monitoring system: Nordic

Additional cable conduits and cable pull shafts will be laid

Earthworks, pipelines and road works

Traffic safety

Road construction: Demolition and restoration of road and pavement surfaces in the area of the

Leitungsgraben (ca. 1.800 m²)

Pipeline trenches, earthworks, excavation pits for connection to existing buildings (approx. 3,500 m³)