Mainka at a glance
Total output 2025
> 330
€ million p.a.
Founded
1895/1949
Branches
- Lingen (head office)
- Brunsbüttel
- Gelsenkirchen
- Cologne
- Münster
- Osnabrück
- Papenburg
- Wuppertal
Mainka employees
> 750
Accident statistics
Construction projects for chemicals, energy and logistics
We plan, construct, renovate and maintain industrial buildings safely, reliably and with many years of experience. Our focus is on complex projects in sensitive industrial environments such as chemical parks, power stations, refineries, energy infrastructure and large logistics sites.
Extension and Conversion of the Mehrum Substation
Extension and Conversion of the Mehrum Substation
For our client TenneT, we are carrying out the extension and conversion of the Mehrum substation. The project includes the replacement construction of the 220‑kV switchgear as well as the extension of the 380‑kV substation. Key challenges include the installation of numerous precast foundation elements, complex steel construction and reinforced‑concrete works.
The project enables a sustainable increase in transmission capacity at this location within the power grid.
Figures and facts:
- Demolition works
- Earthworks
- Concrete works
- Installation of multiple precast individual foundations
- Steel construction
| Customer | TenneT |
|---|---|
| Location | Mehrum |
| Contract value | approx. €20 million |
| Main construction period | 50 month |
Similar references
Of our more than 750 employees, around 60% are construction site personnel, whom we train regularly. On average, we devote 2% of annual working hours to training.
For whom and why?
We generate more than 90% of our turnover in the chemical, energy and specialised logistics sectors. Customers from these sectors trust in our experience because we construct complex industrial buildings reliably and safely.
