Uetliberg Tunnnel (CH): ILF helps Swissgrid turn up the voltage


Swissgrid has commis­sioned ILF, as part of the engineering consortium KiWa220 (@Suisseplan Bau, @Boess Gruppe), to plan and design the extension of the high-voltage line in the Zurich South area. In order to increase the security of electricity supply to the city of Zurich (CH) and the left side of Lake Zurich, the current line will be upgraded to 220 kilovolts (kV) and connected to the grid in the South.

In the first project section, the cable will be laid under­ground along the motorway. Subse­quently, the cable will be pulled through the conduit blocks already in place in both tubes of the Uetliberg Tunnel. In the third project section, a new 2‑km-long energy tunnel, with a diameter of approx. 4 m, will be driven using a tunnel boring machine.

Vorlage NEWS

Hydrogen Production Database for Canada


ILF has been chosen by the Canadian Hydrogen Fuel Cell Association (CHFCA), on behalf of Natural Resources Canada (NRCan), to conduct a survey and develop an evergreen database of existing and planned hydrogen production facilities in Canada, including those currently under construction.

Together with the CHFCA, our team developed a compre­hensive survey that was distri­buted to companies with existing and planned hydrogen production facilities in Canada. The questi­onnaire gathered infor­mation amongst others about hydrogen production, distri­bution systems, technology and carbon capture, utiliz­ation and storage (CCUS); all of which was then entered into the database.

Visit the CHFCA’s website to explore the database:

Hydrogen Production Database for Canada

Metro: ILF takes Warsaw’s Metro 3 to the next level


One of ILF’s long-term projects – the Metro Warsaw project – has taken a great step forward: We are proud to announce that the conceptual design for the new M3 metro line in Warsaw is complete.

In this key project for the residents of the Polish capital, ILF is respon­sible for the pre-design works, including the conceptual design, deter­mi­nation of the impact zones of the metro facilities on adjacent buildings, and the hydro­geo­lo­gical and engineering-geolo­gical documen­tation. In addition, ILF has prepared the functional and user program as well as the technical speci­fi­ca­tions for the execution and approval of works.

The building permit for the Karolin Station on the M2 metro line – another project in which ILF is one of the key players – has also recently been received and the stations Ulrychów und Bemowo have since been opened.

Metro: ILF takes Warsaw’s Metro 3 to the next level

The energy transition in Germany is gaining momentum


To transmit wind power from the windy North to the South, SuedLink, a high-voltage direct current (HVDC) trans­mission line consisting of multiple under­ground cables, is to be built in Germany.
The SuedLink is approx. 700 km long and will be imple­mented by the two project developers Trans­netBW GmbH and TenneT TSO GmbH, with two 2 GW connec­tions each starting in Schleswig-Holstein and running via Baden-Württemberg to Bavaria.

The project developer Trans­netBW GmbH has submitted the first permit appli­cation documents for the southernmost permit appli­cation section, E3, to the Federal Network Agency. ILF, as the regional engineering office, has assisted with the prepa­ration of these documents. The Federal Network Agency has already confirmed the comple­teness of the documents and the process of making the documents available for public review has been initiated.

What’s special about permit appli­cation section E3 is that this section of the trans­mission line runs through the Südwest­deutsche Salzwerke AG’s mines. The special structure in the mines will be connected via two new shafts, which will be almost 200 m deep. With the initiation of the final phase of the approval procedure, the founda­tions for an early start to construction of the SuedLink in the Heilbronn region have now been laid.

In the North, ILF, as the respon­sible regional engineering office, has also contri­buted to the permit appli­cation documents for permit appli­cation section A2 – the first northern section of the trans­mission line – being submitted to the Federal Network Agency in due time by the project developer TenneT TSO GmbH. The parti­cular challenge in this section was to integrate the requested alignment for the two under­ground cables into the design documents for the special structure ElbX, an approx. 5‑km-long tunnel structure between Schleswig-Holstein and Lower Saxony that runs under the River Elbe.

The energy transition in Germany is gaining momentum

Microtunneling: Transit and retention collector in Warsaw (POL)


The Municipal Water and Sewerage Company commis­sioned ILF to prepare compre­hensive design documen­tation for the final stage of the construction of the Vistula collector In Warsaw.

This largest transit and retention collector in Poland’s capital is expected to mitigate the negative effects of climate change on the city. Besides trans­porting waste­water, the new infra­st­ructure facility will also temporarily store excess rainwater and therefore decrease the risk of flooding and reduce storm overflows into the Vistula river. The existing storm sewers as well as the sewer collectors to the Farysa facility and the pressure pipe from the Powiśle pumping station will be connected to the new collector. The collector, with a capacity of 50,000 m³ and base diameters from 1.2 m to 3.2 m, will be about 9.5 km long and will be constructed at a depth of 6 to 15 m below ground. For the construction of the collector, state-of-the-art trenchless micro­tun­neling technology will be applied.

“ILF’s task is to prepare compre­hensive design documen­tation for the third stage of construction of the Vistula collector – speci­fi­cally, from the connection chamber with the Bielański collector to the Farysa facility, along with the pumping station and the necessary̨ associated infra­st­ructure,” explains Marcin Przepiórka, Managing Director from ILF Poland.

The investment is part of a broader project co-financed by EU funds and imple­mented by the Municipal Water and Sewerage Company in Warsaw. Completion of the project documen­tation (construction design and detailed designs) is scheduled for late 2022.

ILF Microtunneling: The largest transit and retention collector in Warsaw

Offshore Wind Farms: Baltica 2 and Baltica 3


ILF is involved in the construction of the largest wind farm in the Polish waters of the Baltic Sea – OWF Baltica 2 and OWF Baltica 3. The project is carried out by PGE Baltica together with Ørsted under the Offshore Program.

The Baltica‑2 OWF will have a capacity of up to 1,498 MW; the Baltica 3 OWF a capacity of up to 1,045 MW. The works are going on and the planned start of green energy production is 2026 (Baltica 3) and 2027 (Baltica 2). The lifetime of the wind farm is expected to be around 30 years.

ILF is respon­sible, among others, for the feasi­bility study, building permit design and obtaining a building permit for the Baltica 3 and Baltica 2 Offshore Wind Farms grid connections.

EDCS: ILF develops concept for industrial energy supply system


As part of an energy research project, ILF has carried out a specific technical, economic and ecolo­gical evaluation of an innovative EDCSproof energy concept for Wiesbauer, an Austrian sausage producer. EDCSproof stands for “Energy Demand Control System – Process Optimiz­ation For indus­trial low-tempe­rature systems” and is a colla­bo­rative research project led by the Austrian Institute of Technology (AIT), funded by the Austrian Research Promotion Agency (FFG) and involving eight scien­tific and indus­trial partners.

The primary goal is to develop an online control concept for indus­trial energy supply systems. This concept shall support the integration of renewables through the use of energy storage, create “flexible consumers” for electric grids, increase efficiency through optimal control of the overall system, and utilize waste heat by using high-tempe­rature heat pumps (<150°C). Hence, it is a concept for decar­bo­niz­ation which recognizes the possi­bi­lities of digitalization.

The evaluation carried out by ILF included an investment calcu­lation based on possible instal­lation locations and the integration of the respective components in the power supply system taking into account the route of the existing piping, spatial condi­tions and other project parameters. ILF compared the EDCSproof energy concept with Wiesbauer’s existing energy concept (CO2 savings, reduction of primary energy factor, cost reduction, etc.) and detected an energy and production cost saving potential.

Please see our White Paper for more details, contact persons and additional infor­mation about energy efficiency (only available in German):

EDCS_ILF develops concept for industrial energy supply system

ILF BIM model for Drammen Railway Tunnel (NOR)


As part of the ongoing Vestfold­banen railway upgrade scheme, the state-owned Norwegian railway infra­st­ructure company Bane NOR is constructing 10 km of new double-track railway between Drammen and Kobbervikdalen.

In 2018, ILF was hired by the Norwegian contractor Veidekke Entre­prenør AS as the designer of the most techni­cally challenging section of this project: a 290 m long tunnel mined in difficult geology below the ground­water table – the Soil Tunnel. ILF prepared the tender design, supported Veidekke during the Compe­titive Dialogue compe­tition, and developed the conceptual design as well as the detailed design of the soil tunnel. This includes a BIM model that is integrated into a combined model of all of the works within the contract.
ILF staff from our offices in Austria and Norway attended the breakthrough ceremony for the Soil tunnel top heading together with more than 200 other guests.

ILF is proud to be part of such a remar­kable and presti­gious project.

Circular Economy: ILF provides EPCM services


ILF is respon­sible for providing EPCM services for Synthos’ project to expand the production capacity for InVento products. The EPCM services which ILF is providing include the design, bidding and procu­rement processes and construction management for the project. ILF’s tasks also include the creation of a 3D model of the project for all phases and disciplines.

Rafał Blankiewicz, Managing Director of ILF Consulting Engineers Polska, on EPCM projects: “Our company has experience in managing invest­ments in the EPCM model. We success­fully completed our first project using this formula in Poland between 2007 and 2010, at a time when the model was still quite unknown.”

ILF has completed the building permit design for the construction of the second production line at Synthos and has obtained the building permit. In the near future, ILF will recommend the contractors for the individual purchase packages and will begin the process of taking over the construction site. The new production line is scheduled to be completed in the first half of 2023.

InVento is an ecolo­gical product used in thermal insulation, manufac­tured using an ecolo­gical geopo­lymer additive which acts as a factor reducing the heat transfer coeffi­cient and thus improving the thermal insulation properties of final building products. InVento products are charac­te­rized by full recyc­la­bility and contain 30% recycled content coming from post-consumer waste in their formula.

Circular Economy: ILF provides EPCM services

ILF among the Top 10 Technical Transaction Advisors (SparkSpread)


SparkS­pread (formerly Inframation), a global platform providing business intel­li­gence on transac­tions worldwide, has ranked ILF among the Top 10 Technical Transaction Advisors in the energy, environment, power and transport sectors (September 2022). In the overall compa­rison of Technical Transaction Advisors, ILF is also ranked 12th.

We would like to thank our numerous clients for the confi­dence they place in us!
We look forward to conti­nuing to support you in the realiz­ation of your various projects in the future. We would also like to extend a special thank you to our more than 2,500 ILF-ers.
Thanks to your commitment, relia­bility, creativity and great dedication, we have achieved this top-10 position together.

Thank you very much!

ILF among the Top 10 Technical Transaction Advisors on SparkSpread

Design works for Northern Feeder Line of Brenner Base Tunnel


Together with one of ÖBB Infra­struktur AG’s and DB Netz AG’s partners, ILF has been commis­sioned with a new project as part of the four-track upgrade of the Northern Feeder Line of the Brenner Base Tunnel. This project comprises the route design and project planning works needed for the submission of the environ­mental impact statement (in Austria) and the conceptual design (in Germany) for the Kirnstein–Schaftenau cross-border section. The approx. 13 km long cross-border Laiming Tunnel is the core element of this upgraded section.

In addition to the Laiming Tunnel, the respective adjacent open-track sections and the associated traffic facilities are also being designed. All of the design services will be carried out using the BIM method and the scope of these design services can also be extended to include the detailed design phase (in Austria) and the basic design phase (in Germany).

Having already been involved in the previous design phases for this section, in parti­cular in the route selection procedure, ILF is pleased to be able to continue working on this complex project in the further design phases.

The section being upgraded forms part of the Northern Feeder Line of the Brenner Base Tunnel, which will be the longest railway tunnel in the world when it is completed. Thus it consti­tutes an indis­pensable part of the Scandinavian–Mediterranean Corridor (Scan–Med Corridor) from Stockholm to Naples – the most important North–South railway link in Europe.


Railways: Design works for the longest railway tunnel in the world

GIPL: Commercial operation begins


ILF has prepared the feasi­bility study for the Gas Inter­con­nection Poland–Lithuania (GIPL) and is pleased to announce that commercial operation of the pipeline has now begun.
The gas inter­con­nection, which is appro­xi­mately 508 km long, enables gas to be trans­ported both from Poland to Lithuania and from Lithuania to Poland. Full-scale commis­sioning of the GIPL project is scheduled to take place in autumn of this year.

ILF is extremely proud that its work has contri­buted to streng­t­hening Poland’s energy security.

Click here to learn more about this project in detail… 

ILF supports Engineers Without Borders in Tshumbe (DR Congo)


ILF has been supporting and providing technical advice for Engineers Without Borders Austria (IOG), a non-profit association for technical develo­pment coope­ration, since 2017.

From 2021 until 2024, the IOG project team, together with the Tyrolean partner association “Zukunft für Tshumbe” (Future for Tshumbe), are planning to implement a water project for a primary school and kinder­garten in Tshumbe (DR Congo).
This TSHUWA project shall comprise facilities for waste­water treatment, rainwater drainage, sustainable drinking water abstraction and state-of the-art rainwater storage.

The IOG team, which includes committed ILF staff, have been helping with the technical design for this project. They have planned and designed the constructed wetland waste­water treatment plant and the rainwater storage and drainage facilities.

© Ingenieure ohne Grenzen Austria und Zukunft für Tshumbe

ILF among the Top 50 in the ENR Ranking


We are delighted to have made it into the Top 50 in the ENR Ranking of the Top 225 Inter­na­tional Design Firms.

The list of the Inter­na­tional Design Firms is based on the revenue achieved by companies outside of their domestic markets. In 2022, ILF is ranked 47th.
Among the top 150 global design firms, ILF has achieved 124th place, with the ranking in this category being based on the overall revenue of the companies.

We would like to thank our numerous clients for the confi­dence they place in us! We will be happy to continue supporting you in the realiz­ation of your various projects in the future. We would also like to extend a special thank you to our more than 2,500 ILF-ers.
Thanks to your commitment, your relia­bility, your creativity and your great dedication we have achieved this together.

Thank you very much!

ILF among the Top 50 in the ENR Ranking

Microtunneling: ILF completes design of stormwater drainage


ILF was commis­sioned by the political munici­pality of Nieder­glatt (Switz­erland) to perform the civil engineering works for a storm­water drainage system.

This paperless project was success­fully executed in a consortium with B+B using the BIM2Field method. The micro­tun­nelling works (DN 1400) over two reaches with a total length of 350 m were completed in July 2021. The civil engineering works have also been completed and included various shaft struc­tures, an intake structure below the river water level and various adjus­t­ments to the existing sewer system.

Despite delays of around three months due to lowering of the ground­water level in the difficult subsoil condi­tions, ILF was able to complete the works within the origi­nally planned time frame.

How sustainable is ILF? The Sustainability Report informs


ILF joins the global movement of companies measuring and disclosing their impacts on the environment, society, economy and gover­nance in accordance with inter­na­tional reporting standards.
The Sustaina­bility Report 2021, which is now available, helps ILF to identify its strengths and weaknesses and to define mid- and long-term goals to reduce our environ­mental footprint and promote corporate sustainability.
We are proud to have taken this first step in making ILF more sustainable.

Read the complete ILF Sustaina­bility Report here …


The two authors of the ILF Sustainability Report Hannah Göttgens and Stefanie Garnitschnig with CEO Klaus Lässer.

Geotechnics and Tunneling: ILF’s part in the Woodsmith Project


ILF is proud to be part of the Woodsmith Project – as a design consultant, working for Strabag’s UK branch to deliver the project for their client Anglo American.

The project in the Woodsmith Mine (ENG) comprises a 37-km-long Material Transport System (MTS) tunnel with a diameter of 4.7 m as well as associated caverns and venti­lation shafts. Mined polyhalite will be trans­ported through this tunnel, in an environ­mentally friendly manner, via conveyor belts under­neath the North York Moors National Park, directly to the materials handling facility in Wilton for further processing. The polyhalite obtained will be used as fertilizer.

ILF has been providing detailed design services for the “Ladycross” steel lining shaft and the associated secant pile shaft in the same location.
In addition, ILF has carried out a CAT III check of the “Lockwood Beck” steel lining shaft design, parts of the MTS tunnel as well as the primary and secondary lining of the sprayed concrete lining tunnels.

ILF to deliver services for the longest offshore gas pipeline in


NNPC (Nigerian National Petroleum Corpo­ration), Nigeria and ONHYM (Office National Des Hydro­car­bures et Des Mines), Morrocco, are progressing with the plans for their mega-project Nigeria–Morocco Gas Pipeline (NMGP). The NMGP, an onshore and offshore gas pipeline crossing the land and waters of 16 countries along the Atlantic coast, shall bring Nigerian gas to North Africa and further to Spain for the European market. The pipeline will not only supply the local markets with reliable energy, it will also support indus­trial and economic develo­pment, create a compe­titive regional power market and benefit all West African countries and their economies.

ILF and DORIS Engineering are delighted to carry out the Project Management Consul­tancy services for the FEED Phase II of this project. ILF and DORIS can make use of their combined expertise and provide funda­mental support to the clients in the delivery of this strate­gi­cally important project.

The PMC services cover the Onshore and Offshore Pipeline and Compressor Station Engineering, the Engineering Surveys, the Environ­mental & Social Impact Assessment (ESIA) and Land Acqui­sition Studies (LAS) and the Project Imple­men­tation Framework. The project explores the potential for using renewable energy resources to power the pipeline and reduce the project’s carbon footprint.

“With ILF having already been part of the Feasi­bility Phase and FEED Phase I of this world-scale project, the award of Phase II to us demons­trates the confi­dence that our long-term clients ONHYM and NNPC have in our Project Management Excel­lence and Relia­bility in delivering world class projects,” said Carles Giro, Area Manager Indus­trial Plants of ILF.

When completed, the over 6,000 km long gas pipeline will be the longest offshore pipeline in the world and the second longest pipeline ever. It has a planned diameter of 48″ offshore and 56″ onshore, with a planned throughput of 30BCMa.
The project coinci­deswith the “Decade of Gas Master Plan” that Nigeria’s President Muhammadu Buhari launched in 2020. On the Moroccan side, this landmark project is part of the South–South coope­ration upheld by King Mohammed VI.


Road tunnels: Completion of the Belchen rehabilitation tunnel


On behalf of the Swiss Federal Roads Office, FEDRO, ILF took the lead in the local site super­vision in an engineering consortium for completing the works at the Belchen rehabi­li­tation tunnel.

The project includes the connection of 11 cross passages to the existing central tube, two service tunnels between the existing and new portal control stations, two crossing passages for the emergency services at the tunnel entrance, a smoke partition wall and an access ramp to the isolated construction site.
The excavation works with a 13.97 diameter TBM taking place at the same time as the struc­tural construction works for the 3.2 km long tunnel were very complex with regard to logistics, design, planning and construction.



Update for one of the most spectacular airports


The Airports Authority of India (AAI) has appointed ILF to carry out a feasi­bility study for the develo­pment and upgradation of Agatti Airport.

This airport is the gateway to the Lakshadweep islands and is the only airport off the West Coast of India. The runway is to undergo a change in design and is to be extended to enable Airbus A320 operation. The terminal building, the apron, the runway end safety area (RESA) system and the taxiway are also to be upgraded for passenger flights. The upgradation of this airport is a challenge due to its special location, the required recla­mation of land and the non-availa­bility of local construction materials and labor.

Along with the feasi­bility study, ILF is also performing the surveying works and environ­mental studies for this project in which environment protection – e.g. marine and wildlife activities such as coral reef rehabi­li­tation – will play a key role.

ILF - Agatti airport - ©
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