Trinkwasser / Löschwasser

The worldwide availability of clean drinking water is very limited. First indications of serious future problems are already apparent in various parts of the world. A more responsible and frugal use of the available resources is therefore all the more important. Therefore, igr incorporates balanced and sustainable water supply designs into its planning for new drinking, non-potable and fire extinguishing water systems.

The range of our services encompasses the planning of new water extraction plants, water storage facilities and water distribution systems, and also current status logging and the rehabilitation of existing plants (for example, water towers). Here, demonstrating possible ways to optimise savings from maintenance overheads and energy costs is our main focus. A technical and economic comparison of various rehabilitation options, ensures the best possible solution is proposed.

We offer comprehensive expertise in the following areas

  • Water collection
  • Water treatment
  • Water storage
  • Water distribution
  • Hydraulic calculation
  • Data base
  • Fire extinguishing water supply

Selected references


Rain water represents a valuable resource, which should not be wasted by being disposed of mixed with waste water. Discharging it into local de-centralised surface water systems or ground water reduces urban pollution of the local water cycle. The goal is a regulated cycle that combines the environmental concerns of nature conservation with the economic objectives of the operating company.

Studies have shown that storm water contains heavy pollution, in part through urban contamination. That is why, in some German states treatment is undertaken before discharge into the surface water system. Our expertise includes a comprehensive repertoire of relevant treatment methods, such as, for example, rain water clarifier or retention soil filters.

We offer comprehensive expertise in the following areas

  • Storm water catchment
  • Storm water treatment
  • Storm water retention
  • Planning approval acc. § 68 WHG

Selected references

 Bingen am Rhein (Kreis Mainz-Bingen),Sanierung Durchlass Mühebach

Rehabilitation of the Mühebach culvert, town of Bingen am Rhein, District of Mainz-Bingen

In the course of renovating the existing 35 m long stream culvert (DN 1000) on the Mühebach in Bingen-Bingerbrück, an application for planning permission was submitted according to § 68 WHG. On the basis of the new hydraulic calculations, the upgrading of the Mühebach with a wider diameter (DN 2000) and longer pipe (67 m) will be undertaken. In addition, a crossbar fabricated as a stone barrier was planned. An investigation of options with economic analysis was required in the course of the planning approval process. igr was also commissioned with the detailed design, the tendering process and assisting in awarding the contract, as well as the on-site construction supervision.

Services provided by igr

  • Investigation of options for the application for planning approval
  • Application for planning approval acc. § 68 WHG, with evidence of the hydraulic efficiency of the open ditch and the piped stream profile
  • Crossbar fabricated as a stone barrier in the upstream of the Mühebach, with evidence of the integrity/stability of the composite-stone ramp
  • Detailed design
  • Tendering and assistance in awarding the contract
  • Dismantling of a dry stone wall, embankment protection and stream bottom stabilisation in stream bed

Key figures

  • 35 m renovation of culvert DN 1000
  • 67 m new stream pipework DN 2000
  • 55 m³ crossbar fabricated as a composite-stone barrier
  • 300 m² dismantling of a dry stone wall, embankment protection

Surface waterway ecological restorations, and waterway development and re-construction belong to engineering tasks in which nature protection plays a major role. igr has guided many planning permission processes, for example, for the new build of a bridge over the Alsenz, with an associated re-routing of a section of the river, or for the development of building or business areas requiring waterway re-routing. Where possible, the waterways are removed from concrete pipes and transformed into natural waterway beds. igr has also been able to support large projects, such as airports, with extensive waterway re-constructions, flood retaining basins, weirs and the installation of water gauges.

In cases of flood protection from near-by waterways, igr has also been able, with the help of technical measures, to protect against further flooding, for example in the underground garage of the German embassy in Paris.

In all projects, we are happy to prepare and guide the authorisations through to planning permission in accordance with § 68 WHG, or in accordance with regional water laws, including undertaking the hydraulic calculations.

We offer comprehensive expertise in the following areas

  • Flood protection
  • Hydraulic engineering
  • Watercourse upgrading
  • Ecological restoration

Selected references


Time does not stand still. New demands on water supply and sanitary engineering are the result of changes and developments in our society. That is why igr collaborates on innovative research projects such as, SinOptiKom (cross-sectorial process optimisation in the transformation of rural municipal infrastructures) sponsored by BMBF (The Federal Ministry of Education and Research). Here we are engaged with population decline, climate change and the energy revolution, which will lead in the future, above all in rural areas, to extensive adaptations in municipal supply and disposal infrastructures. Future proofed adaptation and transformation strategies for municipal infrastructures need to be developed.

Selected references