Pressure-pipeline connection
High-pressure water-intake structure of the Walchensee power station. Inspection for corrosion, sediment cover and the current condition of components.
Waters · Lake
Underwater Inspection at Walchensee — Deep Alpine Lake with Hydropower Connection
Walchensee, with 16 km² and a maximum depth of 189.5 m, is one of the deepest and clearest pre-Alpine lakes in Germany. The pressure-pipeline connection to the Walchensee power station (one of the oldest high-pressure power stations in Germany) creates a special inspection requirement. ScanSustain inspects ROV-based down into the deep zones. 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 Walchensee — subject to approval from local authorities and operators:
Landing stages
Landing stages of the Walchensee shipping line (Niedernach, Urfeld, Walchensee). Inspection of berth edges.
Hotel and private jetties
Jetties around the lake. Assessment of timber components.
Gauge infrastructure
Gauges of the Bavarian State Office for the Environment.
Typical Damage Patterns
What can be professionally captured at Walchensee — a structured overview of the locally typical damage patterns:
Corrosion at the pressure-pipe connection
Steel components of the water-intake structure. Wall-thickness capture and pitting findings.
Timber-pile damage
Support piles of the jetties: fungal attack, pile drift.
Sediment deposition at the pressure-pipe connection
Sediment accumulation can affect the water intake. Structured capture as a basis for maintenance.
On-Site Methodology
Walchensee water is among the clearest in Germany (visibility up to 10 m). ROV optics can be used everywhere, including in the deep zones. Sonar for structured survey of the pressure-pipe area and the bed topography. Deployments at the pressure-pipe connection in coordination with the power station operator.
How Deep is Walchensee?
For method selection in ROV deployments, the lake's depth profile is decisive: near-shore structures such as jetties and landing stages typically lie in the range of 1 to 10 m, while the lake drops off markedly towards the centre.
Maximum depth
189.5 m — one of the deepest pre-Alpine lakes in Germany. ROV systems cover the entire depth range.
Lake area
Around 16 km².
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 Walchensee
Beyond pure condition inspection, municipalities, hospitality businesses and engineering offices at Walchensee are increasingly asking for geometric data — for example for the rehabilitation planning of landing stages, the as-built documentation of high-quality hotel and private 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 Walchensee, the water quality — exceptionally clear by German standards (visibility up to 10 m, see On-Site Methodology) — enables particularly detailed photogrammetric capture, while multibeam sonar additionally delivers the structured surface geometry — especially in the area of the pressure-pipe connection and the bed topography. 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
Bavarian State Office for the Environment. Weilheim Water Management Office. Bad Tölz-Wolfratshausen district administration. Power station operator: Uniper (Walchensee power station).
Frequently Asked Questions
How deep is Walchensee?
189.5 m maximum — one of the deepest pre-Alpine lakes in Germany.
Are deployments at the pressure-pipe connection possible?
Yes, in coordination with Uniper as the facility operator and, where necessary, with reduced water intake.
What is a typical response time?
About 2 hours from the Burgkirchen base. Multi-day deployments are typical.
Does ScanSustain also offer survey and 3D mapping at Walchensee?
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 Walchensee require official approval?
As a rule, yes. The responsible bodies are the Bavarian State Office for the Environment, the Weilheim Water Management Office and the Bad Tölz-Wolfratshausen district administration; for deployments at the pressure-pipeline connection additionally the power station operator Uniper. We clarify responsibility in advance together with the client.
How clear is the water in Walchensee for ROV deployments?
Walchensee water is among the clearest in Germany, with visibility up to 10 m. This means ROV optics can be used year-round and also in deep zones; sonar complements the capture for structured survey, for example at the pressure-pipe area and the bed topography.
Plan a deployment at Walchensee
Describe your use case — within 1 to 3 working days you will receive a concrete initial assessment with method selection and an effort indication.