In Waldweg and Bad Lausicker Straße, approx. 195 m of foul, approx. 98 m of stormwater and approx. 30 m of combined sewers were laid. The sewers were laid in solid-wall polypropylene pipes in nominal sizes DN 200 to 600. The exception is the combined sewer DN 700 crossing the state road, which, due to its large nominal size and the higher loading, was made of glass-fibre reinforced plastic pipe (GFK).

In Brückenstraße, approx. 160 m of combined sewers DN 250 to 300 PP were laid and 6 manholes DN 1000 Sb were built. As a result, 10 house connections were connected to the new combined sewer. The old sewers running across private land were largely taken out of service or will serve in future as private stormwater sewers.

Furthermore, in Grimmaer Straße, 6 foul-water house connections were made following local coordination.

A closed, round, so-called "cyclone tank" in monolithic reinforced-concrete construction with earth covering was designed and built. A usable volume of approx. 62 m³ is provided and the outflow of combined water to the treatment plant is throttled to 6 l/s.

The separating structure with a 3 m long overflow weir, which simultaneously functions as a throttle chamber, is arranged tangentially on the outer wall. During heavy rainfall the combined water is temporarily stored in the catch tank (diameter 7 m) and mechanically treated.

In the centre of the catch tank a pump shaft with a clear diameter of 2 m is arranged for tank emptying. The temporarily stored combined water is returned in a controlled manner to the throttle outflow via 2 submersible motor pumps once the water level in the inlet chamber ahead of the throttle has fallen below a calculated level.

The tank overflow is also arranged on the outer wall of the catch tank. Via a 3 m long weir, on which a lamella submerged wall is mounted, the combined water is discharged directly into the relief sewer DN 600, which further downstream discharges into the piped Jordanbach DN 600. In addition to the relief sewer, an emergency outlet RE 500/300 lying 66 cm higher is provided, which shortly after the structure discharges into an open ditch to be newly profiled and, after 20 m, into the open Jordanbach.

To control the emptying pumps and to record the overflow frequency and overflow duration of the stormwater overflow tank, measurement of the water levels in the tank and in the separating structure by means of hydrostatic level measurement is provided.

By means of a pollutant-load simulation it was demonstrated that the combined water to be discharged during heavy rain via a lamella submerged wall into the receiving watercourse complies with all requirements according to the recognised codes of practice, here in particular the DWA worksheet A128, and that reliable protection of the very weak receiving watercourse can thus be ensured. As a special feature it should be noted that the hydraulically insufficient relief sewer to the receiving watercourse had to be supplemented by an "emergency overflow", which conveys the excess water to the receiving watercourse via a second existing railway crossing.