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Lohsa (dpa / sn) - The renovation of the Knappensee will take a long time after the massive landslide in March.
A concept of how the slipped bank should be secured will not be available until next spring, announced the Saxon Mining Authority.
The flooded open-cast mine was actually intended to be released for recreational use in the 2022 season.
When swimming and boating will be possible instead, is still open, according to the Oberbergamt.
In March, the bank of the lake in the Bautzen district was 500 meters long.
About a million cubic meters of earth began to slide.
Eyewitnesses reported a 1.5 meter high surge wave.
On the diagonally opposite side of the lake, some buildings were damaged.
The cause of the landslide is still not clear.
A report on the results of the investigations is expected in mid-May.
The mining company LMBV has been working on securing the lake since 2014.
Work was also carried out on the water on the day of the landslide, but at a different location.
Around 80 percent of the bank is already considered secured.
The slipped point is not one of them.
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Because the edge is very steep and further landslides cannot be ruled out, the LBMV has now stacked 575 big bags - very large sandbags - on the other side of the lake at Groß Särchen.
They are supposed to protect against a surge wave.
The remedial work of the LMBV continues away from the landslide.
© dpa-infocom, dpa: 210507-99-501394 / 2
LMBV to Knappensee