The Infrastructure Resilience Graph (IRG) is an OWL/RDF knowledge graph for cross-sectoral infrastructure dependencies under climatic hazard exposure with time-dynamic state transitions on a network topology. IRG is a Paper-F spin-off of Bühler, Hollenbach et al., “Systemic Resilience of Interdependent Infrastructure: Multi-Hazard Interactions, Cascading Failures, and the Governance of Climate Risk” (Natural Hazards, Springer, under review; DOI: 10.XXXX/natural-hazards-XXXXX — to be updated upon acceptance). v0.3.1 bundle: (i) four ontology modules (irg.ttl core, irg-lit.ttl literature bridge, irg-damage.ttl damage bridge, irg-bridge.ttl dual-graph bridge) plus a SKOS country-codes.ttl crosswalk (ISO-2 ↔ ISO-3) with 138 exact-match pairs; (ii) the UC1 cross-border instance graph for Konstanz (DE-BW) and Vorarlberg (AT-8), ∼761 Pilot triples, 38 Assets across 4 sectors, 6 CascadeLinks on a PT12H flood-cascade horizon; (iii) twelve SPARQL example queries including the Paper-F Phase-4 insight queries Q12–Q19; (iv) docs and decision logs. The dual-graph companion of Paper F (Section 1.6) is reproducible by combining this IRG release with the companion Literature-KG v0.1 (Zenodo, forthcoming) and the Damage-KG v0.1 (Zenodo, forthcoming). Novelty contributions: (1) the State class as a first-class state history (event-sourcing schema) — not modelled in any prior infrastructure ontology; (2) the CascadeLink reification as a time-annotated cascade edge (propagationDelay, propagationMechanism, triggerCondition) — closes the explicitly open limitation of the HIP ontology (Stephen et al., FOIS 2024). Dock-on Option B: INSPIRE Utility & Government Services (D2.8.III.6 v3.0), UNDRR-ISC HIP-2025 hazard taxonomy, Utility Connection Ontology Design Pattern (Hahmann & Kedrowski, COSIT 2024), optional SOSA/SSN observations, and flat GUID references to IFC 4.3 assets.