The contract has been awarded to Jones Bros Ruthin after an announcement by the previous contractor in July that it could no longer fulfil its commitments to the project.
According to the company, the foundation will be manufactured in an environment adapted for scaled up production.
Minesto is a part of the Deep Green consortium, which includes Minesto UK, KTH Royal Institute of Technology in Stockholm and The Netherlands-based Technobis.
Besides, the global consulting firm Arup Group has been given the task of completing and verifying the design of the foundation.
Taking into the delivery time for the new foundation, Minesto has moved the installation of its unique tidal energy technology in Holyhead Deep to 2018.
Minesto CEO Martin Edlund said: "We are well positioned to meet time frames and deliverables towards our public funding partners, to demonstrate the unique advantages of the Deep Green technology and develop this required source of renewable energy. This situation allows us to prepare and perform the upcoming installation with even greater efficiency and precision.”
In February, Minesto revealed intentions to expand the capacity of its Deep Green technology in Holyhead Deep to 80MW.
In this regard, the Swedish marine energy developer has requested Marine Management Organisation and Natural Resources Wales for their scoping opinion to develop an 80MW facility in Holyhead Deep.