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Extension of Sofia Metro, II-nd metrodiameter, Section from МS "James Bouchier" -МSII-11 up to МSII-12

Subway line II, section (from the subway station MS II-11, km 10+452) to the subway station MS II-12 with a line point after it (km 11+752) and a part of a transport ramp.
The total length of the subway section is 1300.3 m. The tunnel section of 781 m of length from the subway station MS II-11 to the inter-station Ventilation System II 11-12 is to be constructed using NATM (New Austrian Tunnel Method). The remaining part of the route is 

2014 - 2016

Contracting authority:    METROPOLITAN EAD
Consulting engineer:    CONSORTIUM MIK DZZD
Contractor:   METRO CHERNI VRAH 2013 CONSORTIUM
Members of the Consortium are:
- STANILOV LTD.
- G. P. GROUP EOOD
- METROPROJECT
Subway line II, section (from the subway station MS II-11, km 10+452) to the subway station MS II-12 with a line point after it (km 11+752) and a part of a transport ramp.
The total length of the subway section is 1300.3 m. The tunnel section of 781 m of length from the subway station MS II-11 to the inter-station Ventilation System II 11-12 is to be constructed using NATM (New Austrian Tunnel Method). The remaining part of the route is in a strengthened excavation.
Subway construction from km 10+452 to km 11+752.70. The following specifics have been defined:
• A section from km 10+452 (MS II-12) to km 11+233 (inter-station Ventilation System II 11-12), 781 m long: a tunnel using NATM has been constructed in this section. It is a two-track tunnel without a dividing wall.
• A section from km 11+233 to km 11+752.70, divided into three main parts:
• Section I – from km 11+233 to the beginning of subway station MS II-12. It starts with the inter-station Ventilation System, located in the eastern part of Cherni Vrah Blvd. in front of the tram No.10 roundabout. A two-track tunnel section follows; it crosses the intersection of Cherni Vrah Blvd. and Srebarna Street to the subway station MS II-12. Under Srebarna Street and above the subway tunnel, the pedestrian underpass is up to 70.5 m long. The total length of the section is 183.7 m.
• Section II – subway station MS II-12, 167 m long. The station is located under Cherni Vrah Blvd. between Srebarna Street and Todor Kableshkov Blvd.
• Section III – subway station MS II-12 to the end of a line point km 11+752.7, 169.6 m long – a line point with a transport tunnel along Cherni Vrah Blvd. under Todor Kableshkov Blvd. is located in this section.
The junction crossings are 2.
• The first one is on Cherni Vrah Blvd., at its intersection with Srebarna Street.
• The second one is on Cherni Vrah Blvd., at its intersection with Todor Kableshkov Blvd.