
Underwater work, sampling, hydraulic engineering and turnkey JETfloat floating jetty systems from Kesswil

Stuwatec Wasserbau GmbH
Kesswil (CH) · Hafenstrasse 14, 8593 KesswilNew on Amplifa
About Stuwatec
Stuwatec Wasserbau GmbH from Kesswil on Lake Constance is a Swiss specialist company for underwater work, sampling, hydraulic engineering and floating jetties. In the field of underwater work, the company carries out inspections using underwater video and photos, repairs such as welding and cutting, installations, salvage operations and blasting. Its range of services also includes soil and water samples, core freezing, consulting, echo sounding and underwater ultrasonic thickness measurements. In hydraulic engineering, Stuwatec implements bank reinforcements, bank protection, renaturalisation, pile and sheet piling driving, jetty systems, drilling and dredging. As the Swiss representative of JETFLOAT International GmbH (founded in 1971), the company offers modular floating elements made of high-quality HDPE (LUPOLEN 5261 Z) — from requirement analysis and concept development through to turnkey implementation. The underwater work is carried out using a range of hydraulic tools, including a percussion drill, concrete chain saw, stone milling machine and core drill.
- Site
- Kesswil
- Processes
- Underwater work / inspections (underwater video and photos), Underwater repairs (welding, cutting), Installations, salvage operations, blasting (underwater), Soil sampling, Water sampling (physics/chemistry), Core freezing, Echo sounding / consulting, Bank reinforcements / bank protection / renaturalisation
- Materials
- HDPE LUPOLEN 5261 Z, Steel (sheet piles, piles), Concrete
- Industries
- Hydraulic engineering, Diving/underwater work, Port and bank infrastructure
- 01
Requirement analysis and consulting
- 02
Concept development
- 03
Underwater work / hydraulic engineering / installation
- 04
Turnkey implementation incl. inspections (underwater video, photos, thickness
Materials & Processes
HDPE LUPOLEN 5261 Z
High-quality HDPE as the exclusive material for the modular JETFLOAT floating elements.
Steel (sheet piles, piles)
Material for driving work on piles and sheet piling in hydraulic engineering.
Concrete
Underwater processing with core drill, concrete chain saw and demolition hammer.
Locations
Kesswil
CHHead office
- Materials
- HDPE, Stahl, Beton
- Percussion drill (underwater hydraulic tool)
- Concrete chain saw
- Cutting and grinding disc
- Waste water pump (clog-free)
- Stone milling machine
- Impact wrench
- Chain saw
- Demolition hammer
- Core drill
- Ultrasonic thickness gauge (5–99.9 mm)
- Ultrasonic thickness gauge with cable version (2–250 mm, 50 m cable)
Components & Systems

Inside the production








Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Underwater work / inspections (underwater video and photos)Testing | – | – | – | – | – |
| Underwater repairs (welding, cutting)Joining | – | – | – | – | – |
| Installations, salvage operations, blasting (underwater)Assembly | – | – | – | – | – |
| Soil samplingTesting | – | – | – | – | – |
| Water sampling (physics/chemistry)Testing | – | – | – | – | – |
| Core freezingTesting | – | – | – | – | – |
| Echo sounding / consultingEngineering | – | – | – | – | – |
| Bank reinforcements / bank protection / renaturalisationAssembly | – | – | – | – | Steel (sheet piles, piles), Concrete, Stone |
| Driving (piles, sheet piling)Assembly | – | – | – | – | Steel, Concrete, Wood |
| Jetty constructionAssembly | – | – | – | – | Wood, Aluminium, Steel |
| Drilling (hydraulic engineering)Machining | – | – | – | – | Concrete, Rock |
| DredgingAssembly | – | – | – | – | – |
| JETfloat systems: requirement analysis, concept development, implementation, turnkeyAssembly | – | – | – | – | HDPE (LUPOLEN 5261 Z) |
| Ultrasonic thickness measurement under water (5mm–99.9mm or 2mm–250mm with cable version)Testing | – | – | – | – | Metal, Plastic |
11 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Percussion drill (underwater hydraulic tool) | – | – | – | – | Kesswil |
| Concrete chain saw | – | – | – | – | Kesswil |
| Cutting and grinding disc | – | – | – | – | Kesswil |
| Waste water pump (clog-free) | – | – | – | – | Kesswil |
| Stone milling machine | – | – | – | – | Kesswil |
| Impact wrench | – | – | – | – | Kesswil |
| Chain saw | – | – | – | – | Kesswil |
| Demolition hammer | – | – | – | – | Kesswil |
| Core drill | – | – | – | – | Kesswil |
| Ultrasonic thickness gauge | – | – | Measuring range 5mm–99.9mm | – | Kesswil |
| Ultrasonic thickness gauge (cable version) | – | – | Measuring range 2mm–250mm, cable length 50 metres | – | Kesswil |
Additional services
History
- 1971
Foundation of JETFLOAT International GmbH, whose Swiss representation Stuwatec has taken over