Sources and rules

Every source Subterranean News reads, and how each label is decided.

Sources

SourceTypeFeed hostLast check
Tunnel Business MagazineTrade presstunnelingonline.comOK 2026-11-10 05:37 UTC
Trenchless TechnologyTrade presstrenchlesstechnology.comOK 2026-11-10 05:37 UTC
ThinkGeoEnergyTrade presswww.thinkgeoenergy.comOK 2026-11-10 05:37 UTC
International MiningTrade pressim-mining.comOK 2026-11-10 05:37 UTC
SEC EDGAR: Ormat Technologies (ORA)Regulatory filingwww.sec.govOK 2026-11-10 05:38 UTC
SEC EDGAR: Tutor Perini (TPC)Regulatory filingwww.sec.govOK 2026-11-10 05:38 UTC
SEC EDGAR: Granite Construction (GVA)Regulatory filingwww.sec.govOK 2026-11-10 05:38 UTC

Labels

Standard FilingThe item is a regulatory filing with the SEC. The headline is built from the item names in the filing itself.
Breaking NewsThe headline matches a short list of event patterns and at least 2 separate outlets are carrying it.
Industry EventEverything else: contracts, funding, project news, agency announcements.

Method

Each source's public feed is checked once an hour. Headlines published within 36 hours of each other that share most of their significant words are grouped as one story and shown with a source count. Grouping and labels use fixed rules and no AI, so they can be wrong. Follow the link for the full report.

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