The Wöhrder See in Nuremberg, once created for flood protection, is now a popular local recreation area. As part of the transformation into the "Water World Wöhrder See", a bathing bay with a sandy beach and protected areas for biodiversity were created. To secure the lake, 14 New, foldable steel supports were installed. They were sealed with light aluminum stop logs from BÜSCH over a total length of around 22.4 m. This protective measure withstands a water pressure of 130 tons and is 3.1 m high.

Scope of delivery:

+ Stop logs made of aluminium

The Wöhrder See in Nuremberg, once created for flood protection, is now a popular local recreation area. As part of the transformation into the "Water World Wöhrder See", a bathing bay with a sandy beach and protected areas for biodiversity were created. To secure the lake, 14 New, foldable steel supports were installed. They were sealed with light aluminum stop logs from BÜSCH over a total length of around 22.4 m. This protective measure withstands a water pressure of 130 tons and is 3.1 m high.

Scope of delivery:

+ Stop logs made of aluminium

Scope of delivery:

+ 4x Double plate penstock 1640 × 2850 mm
+ Stop gate

Double gate penstocks for improved controllability and operational reliability
Modernization under continuous operation

Hüttenteich reservoir in the Harz region (Germany) serves as an intermediate buffer for intermittently occurring discharge water from drinking water production as well as for stormwater runoff. During construction works, this buffering function had to be maintained at all times, and regulated discharge into the Grane receiving watercourse had to be ensured. At the same time, new shut-off devices were to be installed at the outlet structure to improve robustness, maintainability, and controllability of operation.

Structural solution:

• Installation of four side-by-side double gate penstocks (each 1640 × 2850 mm), with independently operable gates for flexible control and redundancy
• Design in accordance with DIN 19704 (steel hydraulic structures)
• Integrated stoplog frame for safe penstock inspection and maintenance
• Installation within the existing structure: bolted to a site-installed stainless steel support structure and laterally concreted into the existing wall – enabling precise installation, permanent load transfer, and watertightness

Operation during construction (bypass concept):

• Inflow to the Grane was ensured via a water main running parallel to the reservoir, conveying reservoir water
• Discharge water temporarily stored in the reservoir was conveyed via a DN 150 siphon line with downstream penstock (flow rate control) and blended into the reservoir water from the bypass pipeline
• This fully decoupled the Grane inflow from the construction site; in the event of potential turbidity development in the reservoir/construction area, the siphon line could be shut off immediately without impairing the water quality of the Grane

Schedule and environmental constraints:

• The time frame for the work on the Hüttenteich pond was very tight. For nature conservation reasons (amphibian migration), preparatory works outside the water body, such as site establishment, were permitted only from July onward. Works within the water body, e.g., for dewatering measures, were allowed only from August
• Weather risk in the Harz region (Germany) : concreting-critical temperatures are to be expected as early as November; therefore, a tight concreting window with assured curing measures was required to achieve final strength

Operational reliability and maintenance:

• Double gate penstocks provide fine control, redundancy during maintenance or fault conditions, and safe inspection via the stoplog frame

Conclusion:

Despite tight environmental and weather-related constraints, the outlet structure was successfully modernized under continuous operation. The combination of four double gate penstocks (1640 × 2850 mm), DIN 19704-compliant design, an integrated stoplog frame, and hybrid integration into the existing structure provides flexible, maintenance-friendly, and permanently reliable operating conditions. The bypass/siphon concept reliably decoupled the Grane inflow from the construction site while ensuring water quality and schedule compliance.

Scope of delivery:

+ 4x XL4 penstock of 1350 × 1100 mm & 1550 × 1800 mm
+ 4x XL3 weir type channel penstock of 2100 × 1500 mm

Scope of delivery:

+ 4x XL4 penstock of 1350 × 1100 mm & 1550 × 1800 mm
+ 4x XL3 weir type channel penstock of 2100 × 1500 mm

Scope of delivery:

+ 4x XL4 penstock of 1350 × 1100 mm & 1550 × 1800 mm
+ 4x XL3 weir type channel penstock of 2100 × 1500 mm

The special console has a total height of 2.5 m. For better operation, a grating level (customer-specific) is subsequently installed. The installation depth of the lower penstock is: 12.34 m plus an operating height of 1.3 m.

Scope of delivery:

+2x special XL4 penstocks without bridge with 1000 × 1000 mm and 1000 × 1200 mm with 11.5 mWs each

After the extreme floods in May 2014, which caused dozens of deaths and great financial damage in the region, the project of the flood protection structure was pushed ahead by the state with high priority. On January 14th, 2015, the four XL4 penstocks could be installed in a flood protection structure in be installed on site near Brčko by our assembly team.

Scope of delivery:

+ 4x XL4 penstock 1400 × 2250 mm

Scope of delivery:

+ 4x XL4 semicircular penstock - 900 × 1350 mm & 800 × 1200 mm
+ 21x SAFOX G from DN 300 - DN 1600
+ 9x Flap valve from DN 400 - DN 1400

Tailor-made stainless steel penstock and flaps for flood protection

DN 1400 flap valve with counterweight and XL4 semicircular penstock with customised shaped invert have already been installed for construction section VII/VIII 2022-2025. Thanks to the shape of the base, which corresponds 1:1 to the shape of the channel, and the base seal on the plate, the penstock seals the channel perfectly. The penstock can be moved into the maintenance position for maintenance work. The modular actuation system with special emergency actuation via our MOBITORQ mobile actuatorrounds off the durable and safe functionality of the penstocks.

The subsequent stages are already in the planning phase. BÜSCH will be equipping the other construction phases with stainless steel penstocks up to and including 2028. Because future integrated water management needs reliable solutions.

Scope of delivery:

+ 4x XL4 semicircular penstock - 900 × 1350 mm & 800 × 1200 mm
+ 21x SAFOX G from DN 300 - DN 1600
+ 9x Flap valve from DN 400 - DN 1400

Tailor-made stainless steel penstock and flaps for flood protection

DN 1400 flap valve with counterweight and XL4 semicircular penstock with customised shaped invert have already been installed for construction section VII/VIII 2022-2025. Thanks to the shape of the base, which corresponds 1:1 to the shape of the channel, and the base seal on the plate, the penstock seals the channel perfectly. The penstock can be moved into the maintenance position for maintenance work. The modular actuation system with special emergency actuation via our MOBITORQ mobile actuatorrounds off the durable and safe functionality of the penstocks.

The subsequent stages are already in the planning phase. BÜSCH will be equipping the other construction phases with stainless steel penstocks up to and including 2028. Because future integrated water management needs reliable solutions.

Scope of delivery:

+ 4x XL4 semicircular penstock - 900 × 1350 mm & 800 × 1200 mm
+ 21x SAFOX G from DN 300 - DN 1600
+ 9x Flap valve from DN 400 - DN 1400

Tailor-made stainless steel penstock and flaps for flood protection

DN 1400 flap valve with counterweight and XL4 semicircular penstock with customised shaped invert have already been installed for construction section VII/VIII 2022-2025. Thanks to the shape of the base, which corresponds 1:1 to the shape of the channel, and the base seal on the plate, the penstock seals the channel perfectly. The penstock can be moved into the maintenance position for maintenance work. The modular actuation system with special emergency actuation via our MOBITORQ mobile actuatorrounds off the durable and safe functionality of the penstocks.

The subsequent stages are already in the planning phase. BÜSCH will be equipping the other construction phases with stainless steel penstocks up to and including 2028. Because future integrated water management needs reliable solutions.

Scope of delivery:

+ XL4 semicircular penstock 900 × 900 mm, 1200 × 1200 mm with bracket headstocks
+ Hand wheel