Mainzelbahn tramway joint venture

The city’s tramway was extended from the main station to the Lerchenberg district with a section 9.6 km in length. Extensive follow-up and accompanying measures were required for the line management bodies Stadtwerke Mainz, Deutsche Telekom, RWE and Kraftwerke Mainz Wiesbaden to relocate supply lines ( water, high-pressure gas, low-pressure gas, district heating and house supply lines, 20 kV/0.4 kV electricity lines and the construction of new light and traffic signal lines).

Before the road and track construction measures for the sections to be built were started, the affected supply lines were relocated and also partially renewed. In areas where they crossed rail lines, the corresponding cables were laid deeper and also routed in a steel protective duct.

As joint venture partners Faber and Eiffage Rail were carrying out work at the same time, coordination was required to avoid hindering one another. Fixed time frames for the approved sections needed to be observed.

The scope of work included the following quantities:

• 3,000 m re-routing and relaying of gas pipeline, DN 25–DN 400, all pressure stages
• 1,800 m re-routing and relaying of water supply pipeline, DN 25–DN 400
• 3,600 m re-routing and relaying of medium-voltage cables, 20 kV
• 6,600 m re-routing and relaying of low-voltage cables, 0.4 kV
• 4,000 m re-routing and relaying of telecommunication cables
• 7,000 m re-routing and relaying of lighting cables
• 10,000 m cable pipelines for the city utility
• 9,000 m cable pipelines for Telekom
• 29,500 m cabling between 16.00 mm² and 88.00 mm²
• 4,690 m² tarmac works
• 1,000 m² paving works