Hochwasserschutz Dorf Alpthal - Vormassnahmen

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The execution of the flood protection project will be carried out in two separate lots. - Lot preparatory measures - Lot main works The present invitation to tender includes the work from lot preparatory measures. The lot main works is not part of this invitation to tender. The work under lot preparatory measures comprises the following measures: Geissbergbach A new debris/bedload trap will be constructed above Hochweidstrasse. The inlet area will be constructed with blocks in concrete. As an outlet structure, a concrete wall with inserted steel beams (grating) will be constructed. Access for maintenance to the debris/bedload trap is provided from Hochweidstrasse via a new access road with gravel lawn. The existing culvert on Hochweidstrasse remains unchanged. Above the gravel/sediment trap, the channel will be expanded to the required floodwater (HW) cross-section by means of a newly created basin structure with sills, consisting of blocks weighing 1.5 to 2.5 tonnes in concrete. The blocks on the slopes will not be embedded in concrete. Further upstream, at the exit from the forest, a diversion/deflection dam will be constructed by means of terrain…

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