<h1>Let's go ahead</h1>
<p>Every new project involves striking out into a piece of the future. At 3G we head towards the objective on the basis of mutual trust with our clients and with great enthusiasm for our common cause.</p>
<p><a style='color:#fff;' href='en/about-us/philosophy.html'>Find out more</a></p>

<h1 style='color:#000;'>Let's go ahead</h1>
<p style='color:#000;'>Every new project involves striking out into a piece of the future. At 3G we head towards the objective on the basis of mutual trust with our clients and with great enthusiasm for our common cause.</p>
<p><a style='color:#000;' href='en/about-us/philosophy.html'>Find out more</a></p>

Projects

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AVL - L191 Citytunnel Feldkirch - AUSTRIA

In the course of traffic planning and management, the provincial government of Vorarlberg plans a subsurface by-pass in Feldkirch (Austria). It is located in the west of Vorarlberg and borders to Liechtenstein.

Project:

Several parts of the city of Feldkirch will be connected by the traffic planning process “Feldkirch South“. Main part of the project is a conventionally mined round-about tunnel under the area of “Letze“. It will connect four tunnels at a depth of approximately 100 m below surface.

The eastern tunnel, which is a traffic connection to Walgau, leads under Maria Grün to Felsenau to the road L190. The northern tunnel links the southern inner city and the western tunnel underpasses the Blasenberg and ends in the Kapfweg in Tosters. The southern part of this project is the connection to Liechtenstein. The tunnel portal is located in Tisis, which is next to the border to Liechtenstein.

The tunnel construction will be 3.95 kilometres long (including cut-and-cover sections and roundabout tunnel). Furthermore, four emergency tunnels with a whole length of 2.7 km will be built.

Project Timetable:

2014: Environmental Impact Assessment (EIA)
2018: planned start of construction works
2025: tunnel's release for traffic

Services of 3G:

Design and execution of engineering geological – hydrogeological - geotechnical investigations:
- Engineering geological field mapping  
- Core logging (borehole depth: 15- 110 m)
- Evaluatiaon of geophysical borehole logging (Hybridseismic, OBI, ABI, Caliber-Log, Gamma-Log)
- Evaluation of hydrogeological borehole tests (Slug-test and WAP-Test)
- Evaluation and interpretation of mineralogical, soil- and rock-mechanical laboratory tests
 Preparation of engineering geological and hydrogeological report for the environmental impact assessment  
Design and execution of the hydrogeological preservation of evidence: since November 2009 the insitu parameter are measured once a month (discharge and depth to water, temperature and the electrical conductivity) at 62 test points (springs, water gauge and surface cannels).
Since May 2012 every six months water samples are taken at 16 test points for testing chemical/physical parameters, microbiological indicators and isotopical analysis
Preparation and interpretation of measured data for annual and final reports

Location: Feldkirch/Frastanz, Vorarlberg, Österreich

Perid of 3G tasks: Since 2008

Client: Government of Vorarlberg – Vllb-Road Construction Office Widnau 12 6800 Feldkirch - Austria

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