Semmering Tunnel Chain - Existing Portal Pipework Rehabilitation

This Austrian public works tender concerns the rehabilitation of existing portal pipework across six specific tunnels: Grasberg, Eselstein, Semmering, Steinhaus, Spital, and Ganzstein, all located within the Semmering Tunnel Chain in the Östliche Obersteiermark region of Styria. The work likely involves inspection, repair, replacement, and potential upgrades of pipework located at the tunnel entrances. This may include tasks such as welding, pipefitting, concrete repair around pipe penetrations, corrosion protection application, and potentially drainage system improvements. Due to the multiple tunnel locations and the need to work within existing tunnel infrastructure, logistical challenges should be expected, including limited access, working at height, and potential disruptions to rail traffic (though this is not explicitly stated). The 'general' trade classification implies the prime contractor will manage multiple sub-trades.