High safety and environmental standards
At Swissgrid, safety is the top priority. With this in mind, we enforced strict safety and environmental regulations at the job site. The high alpine terrain and unpredictable weather of the snowy 2018/2019 winter on the Albula Pass posed serious challenges for the repair crew. Temperatures were extremely low in April and May, and there was also snowfall, which the strong wind blew into drifts. The local avalanche commission issued an avalanche bulletin every day, and pass crossings and activities were scheduled according to this information. The specialists at the work sites were equipped with avalanche detectors and a container would have provided shelter for 48 hours in an emergency. The work was completed without any accidents.
To protect the high alpine landscape, Swissgrid developed and executed a comprehensive environmental plan. Helicopters were required to stay within defined corridors when travelling from the road directly to the pylon work sites, for example. Construction equipment was driven to the work sites once only and, upon its arrival, moved as little as possible. Soil layers were removed and stockpiled separately and were then placed back in their original locations once the foundation work was done. The natural world was then restored to its original condition as much as possible.
The original lines between La Punt and Filisur were put into service in 1968 by Elektrizitäts-Gesellschaft Laufenburg (EGL).
||380 kV line Pradella – Sils
|Circuits||Filisur – Robbia
Pradella – Robbia – Sils
|Number of pylons affected
|Amount of concrete used||approx. 300 tons|
|Amount of steel used||120 tons|
|Length of conductors installed||30 km
|Number of people involved in the project||approx. 70|
|Costs||CHF 2.8 million