Manager (Survey)

1. Establish and Maintain Survey Control Network

• Create and verify horizontal and vertical control points across the entire project area.
• Establish permanent benchmarks for all critical structures (dam, tunnels, pressure shaft, caverns, powerhouse).
• Maintain accuracy and stability of control stations throughout the project duration.

2. Setting-Out for All Civil, Hydro-Mechanical & EM Works

• Provide accurate setting-out for:
  • Dam and spillway structures
  • Intake, HRT, TRT, adits
  • Surge shaft, pressure shaft/tunnel
  • Powerhouse and transformer cavern
  • Penstock alignment
• Ensure construction matches the design coordinates, alignments, levels and profiles.

3. Underground Works Alignment & Monitoring

• Conduct:
  • Tunnel alignment checks
  • Deformation monitoring (convergence measurements)
  • Overbreak-underbreak evaluation
  • Crown, wall, and invert position verification
• Ensure breakthrough of tunnels from multiple headings occurs within tolerance.

4. Support for Hydro-Mechanical & EM Equipment Installation

• Provide accurate alignment for:
  • Penstocks, steel liners, bifurcations
  • Turbine runner, draft tube, spiral case
  • Generator stator, rotor centreline
  • EOT cranes and monorails
• Maintain high precision as required by OEMs.

5. Topographic & As-Built Surveys

• Conduct detailed surveys for:
  • Excavation quantities
  • Valley, river, and hill terrains
  • Underground cavity mapping
  • Penstock and pipeline routing
• Prepare as-built drawings for all completed works.

6. Quantity & Progress Verification

• Measure:
  • Earthwork volumes
  • Rock excavation
  • Backfilling
  • Concrete quantities
• Support billing verification for contractors and subcontractors.

7. Geodetic and Structural Monitoring

• Monitor movement/settlement of:
  • Dam body
  • Powerhouse
  • Pressure shaft
  • Underground tunnels
• Detect and flag any unusual displacement to engineering or safety teams.

8. Calibration & Instrument Management

• Ensure all survey instruments are:
  • Calibrated
  • Maintained
  • Functioning accurately
• Manage modern equipment like total stations, DGPS, LiDAR, tunnel profilers.

9. Compliance with Codes, Safety & Standards

• Ensure all survey works comply with:
  • BIS/IS standards
  • Project-specific tolerances
  • OEM guidelines for machinery alignment
• Maintain safety procedures in:
  • Underground areas
  • Steep terrains
  • Restricted zones