NI · 10-Q · 2026Q2 · Full report

Grid Modernization and Reliability

NISOURCE INC. · 2026-08-05 · Importance 23 · Surprise 24

NiSource continues upgrading electric systems with advanced grid technologies and modernizing gas infrastructure to improve safety, reliability and leak performance across five states. Approved and pending regulatory programs include major Columbia of Ohio pipe replacement and gas infrastructure programs, Columbia of Virginia and Kentucky modernization programs, and NIPSCO electric transmission, generation and gas replacement initiatives. Columbia of Ohio’s pending 2026 IRP and CEP programs represent $1.185 billion and $1.292 billion of projected capital investment, respectively, while NIPSCO’s pending electric TDSIC-9 and GCT-4 programs represent $451.6 million and $521.2 million. NIPSCO also filed a 2026–2030 gas TDSIC plan seeking recovery of $741.0 million for safety, reliability, modernization and economic-development projects.