“The northwest is becoming more and more thirsty.”
How an outstanding project will ensure water supply
To secure water supplies for the population in the region, the Oldenburgisch-Ostfriesische Wasserverband (OOWV) is constructing a new drinking water transportation pipeline. Some segments are installed underneath several roads and waterbodies via trenchless installation using horizontal directional drilling (HDD) to keep any impairment of humans and nature as low as possible — the egeplast SLM® 3.0 protective-layer pipe system was used for this purpose.
More than 120.000 ft. long, costing approx. 60 million euros, more than 730 days of construction time: The Oldenburgische-Ostfriesische Wasserverband (OOWV) is faced with needing to stem a project the scale of which is quite rare in the German water supply system. A supplementary transportation pipeline is to safeguard the public water supply of the regional population and to improve the distribution of water quantities in the existing supply network.
“The northwest is becoming more and more thirsty”, Sven Ambrosy, district administrator of the Friesland district and head of the OOWV association, declares about the ever-increasing demand.
The transportation pipeline will connect the waterworks in Sandelermöns to the pumpedstorage power plant in Diekmannshausen. On its way there, it crosses the districts of Friesland, Wittmund and Wesermarsch. The start of construction was preceded by several years of planning which, among other things, takes protection of the flora and fauna into account. Planning was performed by the engineering office, Lindschulte from Nordhorn, and involved drawing on the expertise of the egeplast field service and applications engineering throughout the entire planning phase. The first construction phase comprises approx. 16 kilometres of 710 mm egelen pipe.
For approx. two kilometres, the SLM® 3.0 Protective layer pipe system will be used and installed through HDD. This method will be used e. g. to preserve some historical hedgerows along the pipe route or in order to cross under roads and water.
“As in the case of any construction site, we want to keep the impact of the works on humans and nature as limited as possible,” says OOWV Project Managerin Jasmin Hübner.
ARGE PPS Pipeline Systems GmbH from Quakenbrück and RN Rohrleitungsbau Niederrhein GmbH from Krefeld were commissioned with the first construction phase. Processing of the deliveries enabling a fast and uninterrupted construction workflow will be performed in close cooperation between the ARGE project management and egeplast. This cooperation allows for just-in-time manufacturing and freight-optimized deliveries to the respective site at the construction site at large as well as optimal utilization of the limited onsite storage capacities. The next two construction phases will seamlessly follow the first construction phase. The completion and commissioning of the pipeline as a whole is scheduled for 2024.
egeplast international GmbH
Phone: +49 2575 9710 222
Oldenburgisch-Ostfriesischer Wasserverband (OOWV), Drinking water pipeline OD 710, Construction Phase 1 – 16,000 m, OD 710 mm, with 2,000 m consisting in a protective layer pipe
Crossings under waters and tree avenues
Laying of the SLM® 3.0 protective layer pipe OD 710 SDR 11 using the HDD horizontal drilling method
Client: Oldenburgisch-Ostfriesischer Wasserverband
Planning Office: Lindschulte Ingenieurgesellschaft mbH
Contractor: ARGE PPS Pipeline Systems GmbH, Quakenbrück, Rohrleitungsbau Niederrhein GmbH Krefeld