History
The outdoor swimming pool in Hallenberg was built in the 1930s and underwent its first modernisation in the late 1960s. It was operated as a disinfected pool in accordance with DIN 19643 until 2005, then in 2009, it was renovated and reopened as a natural pool.
Description of the Bath
As part of the renovation measures, the obsolete conventional pool technology was dismantled and the old functional building was also completely demolished. A new building with a concrete flat slab resting on filigree concrete supports was constructed on the same site. The façades of the functional rooms, which are located as individual cubes under the “floating” roof, were clad with wooden slats. In the middle of the building is the entrance with ticket office, kiosk and lifeguard area. To the left and right of these are the women’s and men’s changing rooms and the sanitary areas. In addition to this, family-friendly collective changing rooms have been provided. From the middle of the building, the guest can walk along a slightly curved path to the central walkway of the swimming area. This separates the old 50 m pool into a new 25 m pool with an adjacent rock used for diving. A non-swimmers’ pool was separated in the front part of the old pool. The non-swimmer area is completely enclosed by a white-sand beach. In addition, there is a separate paddling area for toddlers with spring stones and a small slide. A special attraction for the little ones is the fountain field in the access area to the middle pier. Another water playground was built on the adjacent low mountain stream of the Nuhne. In the peripheral areas of the facility, new retreat spaces were created from wooden platforms, which in some areas also offer shaded areas with spanned awnings. In its new form, the bath has increasingly become a centre of attraction for visitors from the surrounding communities.
Water treatment
River water from the Nuhne is used as filling water for the natural swimming pool in Hallenberg. For treatment, the river water is first purified via a ‘in-ground’ filter before being fed into the basins. The bathing water is treated via a combination of hydrobotanic, wet and Neptune filter. The wet and the Hydrobotanic filters were integrated into the old basin, so that the raw water can flow directly underneath the footbridges. This saved the relatively expensive overflow channels in this area. The Neptune filter was built separately next to the toddler area and enclosed with two rows of natural stones above ground level so that additional seating could be created here.
Characteristics
Total water surface area: 1,150 m²
Total water volume: 1,578 m³
Usable water area: 770 m²
Water treatment: Neptune filter (208 m²), submerged ground filter (290 m²)
Control: PLC, remote maintenance
Nominal number of bathers: 620 bathers/day
Annual visitors: 23,000 bathers /year
