Government or official record

Pacific Gas and Electric Company Natural Gas Transmission Pipeline Rupture and Fire

National Transportation Safety Board

Cross-File evidence ledger

Where this source supports the record

Each entry separates the File’s editorial relevance note from its exact, section-level claims. A bibliography link without a direct claim is labeled plainly.

Engineering failures · 9 September 2010
The San Bruno Pipeline Rupture and Fire

Line 132 rupture at Earl Avenue and Glenview Drive · United States

Open File evidence →

Why editors use it here
Final investigation findings for the exact site, chronology, casualties, physical damage, probable cause, and contributing failures.
1. Quick read
  At about 6:11 p.m.
  Reviewed 24 July 2026
2. Trigger and conditions
  Electrical work at PG&E's Milpitas Terminal caused pressure changes in the transmission system.
  Reviewed 24 July 2026
3. Uncertainty
  Early reports gave different counts for destroyed and damaged houses and a slightly different pipeline mile point.
  Reviewed 24 July 2026
4. Why it matters
  The rupture began with defects buried for more than half a century, but its severity was shaped by contemporary records, regulation, monitoring, valve design, and emergency decisions.
  Reviewed 24 July 2026