Preparing the underground map…
Left-drag to rotate · right-drag to pan · scroll to zoomDrag to rotate · pinch to zoom
Annotate modeTap a route or visible map surface to place a personal noteSaved only in this browser · not evidence
Map key & routesKey
Inspect the reconstruction without assigning an incident location.
Inspect a route or chamber
Route colors
Colors identify site systems, not incident certainty.
- Main access
- Powerhouse
- Electrical & secondary access
- Water outlet (tailrace)
- Pressure-water route (penstock)
- Terrain · 25 m contours · true scale
Map sources & accuracy
The post-flood layer is a measured-only 27 August 2026 satellite-stereo DSM inside 500 m. Its hillshade and elevation colour are two appearances of one surface. It is NoData at the approximate station reference; 0.5 m is grid spacing, not accuracy. NASA HMA and NextGIS/Copernicus remain explicitly historical alternatives and never fill its voids automatically.
Post-flood terrain method & limits ↗ · Historical terrain method ↗ · Chainage plan PDF ↗ · Control-building elevation PDF ↗