The Mäßtobel presents a high risk of rock falls and mudslides. Prolonged rain and melting snow can result in relatively large landslides. These pose an immediate threat to the road below and, in the worst case, might even reach the populated area of St. Gallenkirch.
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In the past, there have been major rock slides on Breitenberg, a 600 m high escarpment to the south of Dornbirn. Minor rock falls in recent years provided the incentive to install a measuring and warning system.
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The Dornbirn Achfurt, a ford across the River Ach, is a public road that carries approximately 7,000 vehicles a day and is regularly flooded. People come to harm time and again because they misjudge the situation.
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The risk potential is high at the Markklamm, a well known avalanche point in the Mittenwald region. The immediate danger is for the traffic routes that lie below, such as the main road and the Innsbruck-Garmisch railway line.
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It is frequently slips that trigger major mudflows. This also applies to the Wartschenbach, where, because of the geological situation, the population and the infrastructure are both at risk.
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After heavy rainfalls in November 2000, parts of the South Tyrolean village of Nals were devastated by a debris flow. The slope movement responsible for this mudslide has not yet stopped and continues to be active. Constant monitoring is indispensable in order to ensure the safety of the village and its inhabitants.
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The 2,758 m high Stilfserjoch is one of the highest alpine passes in Europe that can be crossed by motor vehicles. Since, at this altitude, heavy snowfalls can occur even in summer, the road must be cleared of snow or sections of road must be temporarily closed for the safety of road users.
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