Inspection and maintenance solutions for hydropower generation equipment

Deteriorating hydropower generation structures and equipment degrades efficiency and increases the risk of failures. MIR Innovation offers hydropower producers in situ solutions that will extend the service life of installed equipment such as turbines and gates and minimize service interruptions associated with inspections and refurbishment.

Assessing the actual condition of submerged structures such as concrete dams is a significant challenge, given the depth and turbidity of the water and the strength of the current.

Another major challenge is accurately measuring the flatness and profile of underwater parts to ensure the proper operation of the structure.

Our inspection and maintenance solutions were specifically designed for these conditions in order to respond to the needs of hydropower producers.

Maski+ – High-performance robot for underwater inspections (under development)

The long-term operability of hydroelectric dams and dikes is dependent on identifying anomalies and symptoms of degradation. However, inspections represent a significant challenge when walls are over 200 m deep and waters are turbulent and turbid.

Maski+ is a specially-designed robot that can safely perform inspections in fresh water. It is fast, powerful, efficient and rugged and is exceptionally agile.

Maski+ benefits

  • Long range: Cable up to 4,000 m long; neutral buoyancy in fresh water
  • Flexibility: Scalable open architecture instrumentation
  • Stability: On-board stabilization
  • Precision: Camera designed for murky environments, telemetric sensors, acoustic camera that produces an overall model of the infrastructure
  • Speed: Automatic launch and recovery system to fast-track deployments
  • Ease of use: Computer-assisted pilot
  • Ease of data interpretation: MPEG-2 videos and digital photos with data overlays
  • Safety: Deployment does not require divers
  • Compactness: Can be operated in confined spaces
  • Operation in hostile environments:
    • Cold, turbid and turbulent water
    • Around branches and cables
  • Power: Operation in turbulent water
  • Ruggedness: Resistant to vibration and impacts during transport
  • Deployment: Fast and easy deployment to lower intervention costs

Maski+ applications

  • Visual inspection in turbid and turbulent water
  • 3D modeling of riverbeds, dam profiles and cofferdam foundations
  • Some simple maintenance tasks

Typical Maski+ use cases

  • Concrete dams
  • Dikes
  • Run-of-river generating stations
  • Bridge piers
  • Tunnel intersections
  • Penstock inspections (under study)

Value creation

  • Fast and accurate evaluation of submerged civil structures
  • Advance detection of anomalies
  • Inspection archiving to monitor changes
  • Improved planning for repair work
  • Reduced generation equipment downtime
  • Extended equipment service life
  • Improved working conditions for workers
  • Supervision of new structures under construction


Click to enlarge
  • Maximum depth: 500 m
  • Cable length: 400 to 4,000 m
  • Dimensions: 102 cm (length) × 81 cm (width) × 70 cm (height)
  • Power: 31 kW
  • Horizontal thrust: 132 kgf
  • Vertical thrust: 124 kgf
  • Weight: approximately 165 kg