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.
Semi turnkey Construction of a Gas and Steam Turbine Power Plant
Semi‑turnkey Construction of a Gas and Steam Turbine Power Plant
For our client RheinEnergie, we delivered the semi‑turnkey construction of a modern gas and steam turbine power plant. The project comprised extensive earthworks, concrete and reinforced‑concrete works as well as full interior construction. Special requirements — such as complex pipeline and sewer construction, formwork and reinforcement works, and the creation of media‑tight surfaces — were successfully implemented.
In addition, we took on the technical building services, including planning.
Figures and facts:
- Earthworks
- Sewer and pipeline construction
- Road construction works
- Asphalt construction
- Concrete works
- Reinforced‑concrete works
- Interior works
- Construction of media‑tight surfaces
- Excavation works
| Customer | Rhein Energie AG |
|---|---|
| Location | Cologne-Niehl, Germany |
| Contract value | approx. €21 million |
| Main construction period | 22 months |
| Man hours | About 200,000 |
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.
