About this project

Mission

The D.U.M.B. Database is a public-interest research project to help people understand where underground facilities may exist, what they were built for, and how confident we are in those claims—using only public, lawfully shareable sources.

  • Evidence-first. Records are source-backed and graded by confidence.
  • Safety-first. We avoid operational detail and generalize coordinates when warranted.
  • Transparent. We show what's verified vs. unverified and link to our sources.

What the site is — and isn't

What it is

  • A curated index of facilities with public sources and confidence labels.
  • Faceted browse and map views to explore by country and purpose.
  • A place to contribute documents, imagery, and corrections responsibly.

What it isn't

  • We do not accept or publish classified information.
  • No access instructions, vulnerabilities, or trespassing tips.
  • Not a venue for un-sourced speculation; claims are labeled accordingly.

Safety & ethics

  • Location redaction/generalization policy.
  • Review before publish: safety + legality checks.
  • Takedown & rectification channel for credible concerns.

Methodology (short version)

  1. Collect public sources (FOIA, declassified docs, imagery, news, academic work).
  2. Normalize into a common record (name, location, purpose, ownership, timeline).
  3. Label claims and assign confidence (Unverified → Confirmed) with rationale.
  4. Redact precise details when public release could do harm.
  5. Review changes with a visible changelog and reviewer.

Read the full methodology →

Source reliability

We evaluate sources by independence, verifiability, timeliness, and domain expertise. Multiple independent sources raise confidence. Anecdotes and single-source reports remain Unverified until corroborated.

"Strong claims require multiple, independent, high-quality sources."

How to contribute

  • Use the submission form to share public documents, imagery, or leads.
  • Include dates, original URLs, and archive links (e.g., Wayback/Perma).
  • Mark what is confident vs. uncertain; we'll label it clearly in the record.

Submit a Tip → · Upload files →

Contact & rectification

To request a correction, redaction, or takedown based on credible safety or legal concerns, contact the site administrators via the Contact page. Provide specific URLs, descriptions, and supporting references.

Attribution & licensing

Unless otherwise noted, text and structured data are released under CC BY 4.0. Uploaded images or documents retain their original licenses—please review source terms and provide attribution. We credit contributors when possible.

Team & acknowledgements

Project leads

Add names / bios / contact aliases here.

Contributors

Add researchers, mappers, and reviewers here.

Thanks

We thank open-source mappers, FOIA staff, and the OSINT community for constructive feedback.

Transparency

We display a visible changelog, reviewer, and last-updated date on each facility record. If you see an error, please file a correction with sources. We also publish redaction rationales for sensitive locations.