Winners of TDI Awards 2025

Hölscher Jensen are proud TDI Awards 2025 winners of Equiptment or Material Innovation of the Year for MainOps and Dewatering Contractor Project of the Year for the Nordhavnstunnel project. TDI Awards are an annual celebration of excellence across the dewatering industry, which for the first time in 2025 was celebrated in-person as the culmination of a two day conference gathering global industry experts. Thank you to The Dewatering Institute for an inspiring conference and for acknowledging our dedicated work with these two awards.

The award for Equiptment or Material Innovation of the Year was given based on our digital platform MainOps, an advanced online platform developed by Hölscher Jensen, designed for planning, documentation and invoicing of complex drilling and ground water lowering opererations. The platform consolidates the entire project workflow in one place, from the initial planning stage to final invoicing – ensuring complete transparency, efficiency and traceability for all stakeholders.

Project managers are able to create the framework of their project from the begining, with tendering, safety forms and toolbox meeting recorded directly in MainOps. Tasks are automatically linked to the specific documentation and cost agreeed with the client, and can be assigned directly in the system, consilidating daily planning in one place. Once the task is perfomed and approved, any paid tasks and hours are automatically transfered to the invoice without additional handling.

Employees working in the field are able to access their daily work schedules via smartphone or tablet, enabling functional documentation with tests, installations, maintenance reports and related data automatically stored in the database with date, time and GPS-coordinates. Measurements of water levels, pressure and flow are registered in real-time via QR-codes, and automatically transfered directly into the SCADA system for calibration of sensors and equiptment – eliminating doubt about measurements carried out correctly and on time. Daily logs can be filled out and saved throughout the day, to ensure the works are documented as performed – and once the log is complete by the end of day, all hours are automatically incoorporated to each employees hour sheet.

By combining automation, digital documentation and real-time data, MainOps sets a new benchmark for digitalisation within drilling and groundwater lowering operations allowing focus to remain on the construction process itself.

Hölscher Jensen was awarded Dewatering Contractor Project of the Year for our ongoing work with Denmarks largest dewatering project, for the Nordhavn Tunnel project in metropolitain Copenhagen. The project’s risk-led approach coupled with compartmentation and targeted grouting with responsive pump control to limit geotechnical and environmental uncertainty at each construction stage, has created an unusually large scale dewatering project in a dense urban-marine setting, requiring disciplined hydraulic control to succeed.

The dewatering scope was abstraction of approximately 16–20 million m³ of groundwater over ~28 months, with reinfiltration used strategically to stabilise heads and minimise advective transport. A defining feature is the use of distributed reinfiltration as a hydraulic barrier to protect sensitive structures and minimize the risk of mobilising contamination.

Across heterogeneous strata—from marine sands to Copenhagen limestone—the team has maintained excavation stability and target drawdowns under live city constraints, supported by an integrated network comprising 19,4 km of pipework that ties together pumping, reinfiltration and water treatment plants for discharge to Copenhagen harbor. An achievement enabled by our solution-oriented approach, dedicated effort, and strong collaboration with the project’s main contractor to revise and improve the dewatering plan as needed.

The project’s high priority of Environmental Health and Safety has been a focus point throughout, with monthly and annual recognizions of project Safety Representatives. Notably, Hölscher Jensens’s Safety Representative Luca Garrone was recognised as Safety Representative of the Year 2024 for proactive engagement, including the reporting of 25 near-miss incidents within a single year—helping to prevent hazardous situations and reinforcing a safety culture that matches the project’s technical ambition.

Dewatering at the Nordhavn Tunnel, will continue for the remainder of the project – currently estimated to be finalized mid-2027. We are looking forward to continuing our strong collaboration with the main contractor BESIX-MTH JV, until the project’s successfull completion.