Case studies

A solution for every project

The expertise and know-how we have developed over the years, combined with the commitment of our employees, allow us to successfully meet the various challenges that our customers  submit to us.

For us, each project is unique and we dedicate the efforts and resources needed to develop the optimal solution that takes your technical, time and cost constraints into consideration.

Our markets

With international expertise in high-precision machining, fabrication and mechanical assembly, Marmen is a highly regarded subcontractor for major OEMs and one of the largest manufacturers of wind towers in North America. For more than 40 years, we have been serving multiple markets, including aviation, oil and gas, hydropower, steam and gas turbines, nuclear power, mining and steel mills, wind power, infrastructure, space, defense and military and many more.

Here are a few examples of projects that demonstrate our ability to meet specific needs.

Project: Wells Dam

Washington state, USA

Rehabilitation of a turbine wheel


Toshiba America Energy Systems Corporation entrusted us with the mandate to rebuild a Kaplan-type turbine wheel, which is almost 8 meters (26 feet) in diameter. The assembly of this complex part consisted of more than 5,000 components. The main challenge was the complexity of managing the multiple stages of the cycle: disassembly, cleaning, inspection, repair and / or replacement with new parts, welding, machining and assembly. A refurbishing project involves a degree of uncertainty about component wear and has a significant impact on planning.


The great skills of our technical team allowed us to propose solutions to minimize costs and to stay on schedule despite the unexpected. Our numerous equipment allows us to have greater production flexibility in a context of repairing many parts of all sizes. In addition, the variety of processes that we offer internally (welding, NDT inspection, machining, painting, assembly and logistics) considerably reduces cycle time.


Thanks to the coordination and cooperation between the teams of our various departments, the refurbishing went well and we delivered high quality parts, on time, to our client.

Project: Riel Converter Station, Manitoba Hydro

Manitoba, Canada

Outstanding assembly


The challenge of this major project was to provide our customer, Voith, with state-of-the-art expertise for the design and complete manufacture of four 200 tons (200,000 kg) synchronous capacitors, including welding, machining, assembly, stacking and winding. The manual assembly of more than 100,000 plates was also a real challenge for our teams.


We prepared a design review according to ASME standards of a section VIII division I pressure vessel and based on our expertise acquired in previous projects for this same type of part.

For assembly, a special team was formed to work with the client. Then, specific pressure and sealing tests were carried out to ensure the proper functioning of the part.

To meet the customer's schedule, we established sound planning with very precise workflows. In addition, the effective training of our employees to perform specific operations, such as stacking and winding, combined with a 7-day, 24-hour work schedule, contributed to the successful completion of this large project.


The success of this project is the result of the mobilization and close collaboration between several departments at Marmen and the client. We optimized the design of the part to reduce customer costs through the judicious use of a machine fully developed in-house.

All these initiatives contributed to the realization of a large-scale project, delivered on time and with superior quality.

Project: Henvey Inlet

Ontario, Canada

Very high towers, very big challenges


Vestas entrusted us with the mandate to manufacture the highest and heaviest wind turbine towers ever made in America, with a height of 134 meters (440 feet) and a weight of 450 tons (450,000 kg). The Henvey Inlet project consisted of 87 towers of 7 sections each for a total of 609 sections to be delivered in a limited time.


To carry out this project, we used two of our wind turbine manufacturing plants, those in Matane and Trois-Rivières. To optimize the production of these new towers, we modified the production line to adapt it to the new thickness of plates and added a specialized production line.


Our teams in Trois-Rivières and Matane worked closely together and were innovative in carrying out this project. We delivered towers of exceptional quality on time, to the great satisfaction of the customer.

Project: Girders for the new Champlain bridge

Quebec, Canada

Oversize and complex parts


Canam entrusted us with the mandate to produce 168 girders, each 60 to 100 feet long and weighing 55 to 85 tons (55,000 kg to 85,000 kg), to serve as a structure for the deck of the new Champlain Bridge in Montreal. The challenges of this project were, without a doubt, the size and weight of the parts to be manufactured, the quantity and the tight schedule. This was also our first infrastructure project of this magnitude.


To carry out this impressive project, we almost doubled the size of our fabrication plant, increasing it by 4,000 square meters (40,000 sq. ft.) and installed specialized equipment for assembly, mechanized welding, sandblasting and handling of the girders. We also implemented quality standards from the Ministry of Transport and formed a working team of 100 people dedicated to this project.


Thanks to the total commitment of our teams dedicated to this major infrastructure project, we completed and delivered quality girders in the required time.