Verified so far
- The Cultural Heritage Agency’s dossier dates the Waterbollen to 1970 and identifies Wim Quist as architect.
- The complex consists of three spherical reservoirs, each approximately ten metres in diameter and with a stated capacity of 500 cubic metres.
- The spheres stand at differing heights of roughly thirty to forty-five metres.
- The dossier describes the complex as still operating and identifies it as a protected national monument.
Evidence limits
No current water levels, flow, pressure, maintenance condition or live operational capacity are inferred. Documentary photography remains withheld pending complete reusable-media evidence.
Sources
- 1Rijksdienst voor het Cultureel ErfgoedPost-65 dossier: Waterbollen (opens externally)
- 2Official Gazette2026 designation notice (opens externally)