Silver Forest Tunnel
Russia, Moscow
2004 – 2006

This project involved tunnelling under the conservation area known as "Serebryanny Bor" (the silver forest) northwest of Moscow on the banks of the river Moskva, the objective being to facilitate the flow of road and metro traffic. Two double storey tunnels were planned, with the upper storey accommodating a three lane highway for road traffic and the lower storey reserved for the "Strogino" metro line.

The once world's largest Mixshield that had already been deployed in the construction of the fourth Elbe tunnel and the Moscow Lefortovo road tunnel was once again on a tunnelling mission. Refurbished, modified and now named "Elisaveta", the machine excavated the first tunnel in 2005. Following its repositioning, S-250 was back underground in autumn, ready for the challenge of the second part. The Mixshield "Elisaveta" reached breakthrough on October 12, 2006 well ahead of schedule.

A Herrenknecht Mixshield with a diameter of 6,280mm excavated at the same time the parallel service tunnel. Tunnelling of 1.5 kilometers was completed after ten months.

Data Sheet

Country, Location

Russia, Moscow


2004 – 2006


Road, Metro, Service tunnel


Heterogeneous ground
Sand, clay, rock

Tunnelling length

4,508 m

Machine Data

1x Mixshield:
Diameter: 14,200 mm
Lining method: Segmental lining
Cutterhead power: 3,200 kW
Torque: 26,600 kNm

1x Mixshield:
Diameter: 6,280 mm
Lining method: Segmental lining
Cutterhead power: 630 kW
Torque: 2,332 kNm

Your contact person Contact us

Steffen Dubé President and General Manager Herrenknecht Tunnelling Systems USA Inc.
Gerhard Goisser Commercial Manager Herrenknecht Tunnelling Systems USA, Inc.