References
Welcome to Unwa Oy’s reference page!
We are a professional diving contractor based in Central Finland, with our main office located in Muurame. Each year, we are commissioned to perform demanding underwater inspection and construction work. We are experts in water and shoreline construction. Our company has over 30 years of combined experience in underwater specialization!
At Unwa Oy, our site managers are seasoned professionals who ensure that each diving team operates safely and to the highest standards. Our divers have worked at over 50 different hydropower plants across Finland annually and have participated in numerous underwater construction projects.
Below, you can explore examples of our client stories.
Bridge Repair Work at Suopuro and Niemenjoki
In 2024, we worked as the diving contractor for Oteran Oy on the repair projects of the Suopuro and Niemenjoki bridges. Our tasks included...
Waterway Transport Services on Lake Päijänne
During the summer season from June 1st to August 14th, 2024, we provided waterway transport services for Laukaa Energia Oy. We transported their...
Needle Dam Installation at Isohaara Hydropower Plant
We worked as a subcontractor for Ramago Oy on the installation of a needle dam at the Isohaara hydropower plant. The needle dam was installed in...
Underwater Concrete Repairs at Merikoski Hydropower Plant’s Tailrace Channel
We are working as a subcontractor for Ramago Oy at the Merikoski hydropower plant. Our responsibilities include all underwater construction and...
Foundation Repairs of the Guest Marina Pier at Toijala Harbor
In the summer of 2023, a diving inspection was carried out at the guest marina pier of Toijala Harbor, operated by the City of Akaa. The guest pier...
Diving Inspection of the Tailings and Clarification Basins at GTK Mintec, Outokumpu
We carried out a comprehensive diving inspection at GTK Mintec’s tailings and clarification basins in Outokumpu. The inspection covered a total of three basins.
Diving Inspections at the Jyväskylä Yacht Club’s Home Harbor
The Jyväskylä Yacht Club’s home harbor is located on Juurikkasaari island in the Säynätsalo district of Jyväskylä. Unwa Oy was commissioned to carry out diving inspections for 130 stern buoys at this site.
Inspection and Relocation of Pressure Sewer in 2023 and 2024
In 2023 and 2024, Varpaisjärvi Earthworks and Water Technology commissioned several diving inspections from Unwa Oy. The inspections focused on a pressure sewer and its location on the shoreline of Ainola in Korpilahti.
Unwa Oy Project Photos
