APCo grid fragility (Getis-Ord Gi*) — loading…236 MultiGraph N-1 bridges indexed to H3 res 6 and weighted by substations isolated. A bridge is a CONNECTIVITY single point of failure, not a power-flow contingency; `isolates` counts SUBSTATIONS, not customers and not MW. 132 of 236 (56%) sit on INFERRED geometry.Beyond the filed paper — grid connectivity, not an affordability metric.