With a relatively manageable amount of effort, the consequences of heavy or prolonged rainfall could be better brought under control in Puchheim-Ort.
This is suggested by the heavy rain concept of an engineering office, which was recently presented to the city council's environmental committee.
Puchheim - The slope water from the Parsberg - the real cause of full cellars in Altdorf - is to be partly held back and diverted, but also to be able to flow more easily into the Gröbenbach.
The residents on Alte Bahnhofstrasse, who are most affected by flooding in addition to the Ortles on the southern outskirts, are to be given more security by a protective line.
While the sewer network, which was driven through with cameras and flushed out on this occasion, met the requirements, the hydrologists identified two weak points on the surface.
On the one hand south of the forest road ditch.
The drainage trenches are already overloaded in heavy rain, but here the passages, although large in number, are too small.
The water runs over and towards the buildings instead of being able to get lost on the northern side.
The experts recommend a small wall to initially hold back the tide and further culverts at suitable points.
A larger measure is required at the football field, where the trenches with piped pipes come to the surface again and which is regularly flooded when there is heavy rainfall.
Here the experts would create a small flood basin and build a wall at the northern end or rather build a 80 centimeter high wall.
The water dammed in this way should flow faster into the neighboring Gröbenbach via a second passage.
The latter conversions, with a gross cost of 200,000 euros, would be significantly more complex than the modeling on the Parsberg slopes.
A step-by-step implementation is possible, anyway, all planning must be approved by the water management office.
From this side, however, there are grants of up to 50 percent.
In the end, the members of the committee were convinced that they approved the concept.
(op)
