Ship landing stages
Landing stages at the Millstätter See (Millstatt, Seeboden, Döbriach). Inspection of berth edges.
Waters · Lake
Underwater Inspection at the Millstätter See — Carinthia's second-largest lake
The Millstätter See, with 13 km² and a maximum depth of 141 m, is Carinthia's second-largest lake and is shaped by hotel infrastructure in Millstatt, Seeboden and Döbriach. ScanSustain inspects the entire lake depth ROV-based — a multi-day deployment is typical. Actual deployments are subject to approval by the responsible local authorities, facility operators and shipping administrations.
Characteristic Structures
These structure types can be inspected ROV-based at the Millstätter See — subject to approval from local authorities and operators:
Hotel jetties
Jetties of the hotel industry around the lake. Condition assessment of components.
Lido facilities
Municipal lidos. Inspection of jetty and platform structures.
Gauge infrastructure
Gauges of the Carinthian Hydrographic Service.
Typical Damage Patterns
What can be professionally captured at the Millstätter See — a structured overview of the locally typical damage patterns:
Timber-pile damage
Support piles: fungal attack, pile drift.
Algae growth
Seasonal growth layers.
Sediment deposits
Accumulation in bays and in the approach zones of landing stages.
On-Site Methodology
Millstätter See water is clear (visibility 3 to 5 m). ROV optics primarily, sonar for structured bed captures. Depth inspection in the deep areas with higher positioning accuracy.
How Deep is the Millstätter See?
For method selection in ROV deployments, the lake's depth profile is decisive: near-shore structures such as jetties, landing stages and lido facilities typically lie in the range of 1 to 10 m, while the lake drops off markedly towards the centre.
Maximum depth
141 m — one of the deepest lakes in Austria and the deepest lake in Carinthia. ROV systems cover the entire depth range.
Lake area
Around 13 km² — Carinthia's second-largest lake.
Mean depth and the exact position of the thermocline vary by source and season. For projects with accuracy requirements we recommend verifying these values in advance against a current hydrographic source — we do not take them as given unchecked when planning a deployment anyway.
Survey & Mapping at the Millstätter See
Beyond pure condition inspection, municipalities, hotel businesses and engineering offices at the Millstätter See are increasingly asking for geometric data — for example for the rehabilitation planning of landing stages, the as-built documentation of high-quality hotel jetties or the bathymetric mapping of shoreline sections ahead of a construction project. With Survey & Mapping, ScanSustain offers photogrammetric and multibeam-sonar-based capture that delivers depth profiles, site plans and 3D models in CAD/GIS-ready formats.
At the Millstätter See, the clear water quality (visibility 3 to 5 m, see On-Site Methodology) enables a good combination of optical detail capture and multibeam sonar for the surface geometry. This combination is particularly relevant for gauge structures, berth edges and larger jetty facilities when a geometric baseline is needed for rehabilitation or monitoring.
Regional Authorities and Bodies
Carinthian Hydrographic Service. Water-rights authority, the Spittal an der Drau district administration. Municipalities of Millstatt, Seeboden, Radenthein.
Frequently Asked Questions
How deep is the Millstätter See?
141 m maximum — one of the deepest lakes in Austria and the deepest lake in Carinthia.
How far is the lake from Braunau?
About 170 km as the crow flies. Multi-day deployments are typical.
Which season is optimal?
Spring and late autumn, outside the main tourism season.
Does ScanSustain also offer survey and 3D mapping at the Millstätter See?
Yes, as part of Survey & Mapping — currently as a pilot service, with photogrammetric and multibeam-sonar-based capture for depth profiles, site plans and 3D models in CAD/GIS-ready formats.
Does an ROV deployment at the Millstätter See require official approval?
As a rule, yes. The responsible bodies are the water-rights authority, the Spittal an der Drau district administration, as well as the affected municipalities of Millstatt, Seeboden and Radenthein. We clarify responsibility in advance together with the client.
Does the great depth of the Millstätter See require special ROV equipment?
In the deep areas we work with higher positioning accuracy, as the Millstätter See is among the deepest lakes in Austria. The clear water quality (visibility 3 to 5 m) supports optical capture even at greater depth.
Plan a deployment at the Millstätter See
Describe your use case — within 1 to 3 working days you will receive a concrete initial assessment with method selection and an effort indication.