Avalanche Prevention

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1 Avalanche Prevention WEIßSEE GLETSCHERBAHNEN, STUBACH BEI UTTENDORF (SALZBURG), AT

2 WEIßSEE GLETSCHERBAHNEN, STUBACH BEI UTTENDORF (SALZBURG) Avalanche Prevention Project Weißsee Gletscherbahnen, Stubach bei Uttendorf (Salzburg) Project number P Street Stubach 90 Zip code 5723 Place Uttendorf Country/Region Austria Year of installation 2016 Customer Engineering Contractor Weißsee Gletscherwelt GmbH Ingenieurkonsulent DDipl.-Ing. Stefan Oberndorfer Felbermayr Bau GmbH & Co KG, Abt. FST, Niederlassung Lienz Situation Falling rocks and weathering had damaged the previous wooden avalanche protection structure. The original protective function had to be restored. Furthermore, other hazardous areas had to be secured in order to provide better protection for the entire ropeway system. In the project which was originally submitted, the intention was to construct massive avalanche wedges made of reinforced concrete. These were designed to directly protect double supports 21a and 21b, as well as support 22. On account of the enormous dimensions of this structure, the associated costs, and the considerable impact on the landscape in a conservation area on the edge of the Hohe Tauern National Park, a new protection project was created. Description The new protection concept combines three elements: permanent protection against avalanches through an avalanche protection structure made of snow nets temporary protection against avalanches through avalanche blasting in conjunction with an avalanche diversion dam to protect objects Overall, eight sets of SPIDER Avalanche snow nets with a total length of 140 meters are being erected in three potential avalanche starting zones. With this measure, it is only necessary to construct a 35-meter-long and approximately 3-meter-high dam made of locally acquired, heavy rubble. With the hardly visible snow nets and natural dam, the authorities were extremely satisfied in terms of conservation of nature and the landscape. Protected object Systems Touristic infrastructure SPIDER Avalanche Corrosion protection Galvanized, GEOBRUGG SUPERCOATING Avalanche Prevention Weißsee Gletscherbahnen, Stubach bei Uttendorf (Salzburg), AT 2/7

3 System length 8 m - 28 m Effective height (Dĸ, snow thickness) 3.0 Gliding factor 2.5 Avalanche Prevention Weißsee Gletscherbahnen, Stubach bei Uttendorf (Salzburg), AT 3/7

The ropeway then continues to Rudolfshütte at 2,315 m above sea level.

4 Short set made up of two edge nets. In the background on the left, you can see the Grünsee mid-station at 1,742 m above sea level. The ropeway then continues to Rudolfshütte at 2,315 m above sea level. Overview of the project area with the potential starting zones and the ropeway line to be protected. The double supports are most at risk. They are to be protected against any flowing avalanches that may occur by an additional diversion dam made of natural stone. The existing wooden avalanche guards have been severely damaged due to frequent rockfalls and weathering. They not longer guarantee the protection required and are therefore being removed. Avalanche Prevention Weißsee Gletscherbahnen, Stubach bei Uttendorf (Salzburg), AT 4/7

The avalanche nets from the SPIDER Avalanche system have not just proven their capabilities as an ideal avalanche construction they have also

The pressure plate forms the ideal foundation for the supports in terrain with a 45 incline and a rocky substrate.

5 The avalanche nets from the SPIDER Avalanche system have not just proven their capabilities as an ideal avalanche construction they have also been successfully tested against rockfall. This durability when faced with falling rocks is the key advantage of the Geobrugg system. The pressure plate forms the ideal foundation for the supports in terrain with a 45 incline and a rocky substrate. It is loosely held in position with two ground ropes anchored on the slope, on leveled terrain measuring around 0.7 m x 0.7 m. The avalanche nets are fixed to the uphill rope anchor with a retention rope, which is cut to size at the factory, with the corresponding number of loops. The rope anchor used is relatively insusceptible to the rockfalls which happen regularly here. Avalanche Prevention Weißsee Gletscherbahnen, Stubach bei Uttendorf (Salzburg), AT 5/7

The SPIDER net surface is supplied from the factory with a

6 The SPIDER net surface is supplied from the factory with a screen-like fixed fine mesh and prevents the snow from penetrating. View of the supports to be protected on the Weißsee glacier ropeway. From the gondola, the avalanche nets blend seamlessly into the alpine landscape they are hardly noticeable. Avalanche Prevention Weißsee Gletscherbahnen, Stubach bei Uttendorf (Salzburg), AT 6/7

com Generala Dorokhova st. 14 119530 Moscow Russia info@geobrugg.

7 For questions please contact our Geobrugg specialist at your side Alexander Barinov, Geographer PhD Phone Mobile Generala Dorokhova st Moscow Russia A company of the BRUGG Group Certified to ISO 9001 Avalanche Prevention Weißsee Gletscherbahnen, Stubach bei Uttendorf (Salzburg), AT 7/7

Protezione contre le valanghe

Protezione contre le valanghe WEIßSEE GLETSCHERBAHNEN, STUBACH BEI UTTENDORF (SALZBURG), AT WEIßSEE GLETSCHERBAHNEN, STUBACH BEI UTTENDORF (SALZBURG) Protezione contre le valanghe Progetto Weißsee Gletscherbahnen,