Desilting of six rainwater retention basins in Hanover

After M&P successfully accompanied the rehabilitation of the Maschteich and Vierthaler Teich on behalf of the City of Hannover from 2016 to 2017, six rainwater retention basins (RRB), mainly in Hannover's south-west district, are now to follow in order to sustainably improve their water quality as well.

In general, a total of approx. 10,000 m³ of sludge is to be pumped out of the RRBs in the coming winter half-year 2018/2019 by means of buoyant suction vehicles, dewatered in a watertight manner and then transported to the corresponding recycling or disposal facilities according to in situ sampling. Current work in January 2018 For the concept development and the preparation of the tender documents, site inspections of all six RRBs were carried out in order to be able to take into account both infrastructural and species protection concerns in the context of the tender. In addition, all RRBs were sampled in situ in coordination with the waste authority in order to be able to do without a declaration in containers within the framework of the actual desludging measure. This way, the material can be disposed of directly after appropriate treatment. On four days in January, close-meshed sampling of all RRBs was carried out by boat using a sludge sampler. At the same time, a detailed survey of the RRB was carried out. After evaluation of the data and coordination with other authorities, the measure will be put out to tender in February/March.

M&P Engineering Company Ltd.

Hans-Böckler-Allee 9

30173 Hanover

Tel.: +49 (0) 511 / 12 35 59-0