Curated reference and analysis. Last full review: July 9, 2026
Verify all figures against ISO sources before relying on them for project decisions.
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Exhibit 2 · Project signal

Oncor Longshore–Drill Hole 765-kV Line

Transmission · Permitting
ISO/RTO:ERCOTConfidence:High
Status
Permitting
State
TX
County
Permian Basin
Nearest city
West Texas
Utility
Oncor / ERCOT
Developer / owner
Oncor
Estimated load
Not disclosed
Estimated generation
Not disclosed
Reported capex (as cited)
Multi-billion (filing)
Announced
2025-12
Expected COD
Targeted energization December 2028
Public summary
Oncor filed the ~180-mile Longshore–Drill Hole 765-kV line in December 2025 — the first leg of the Permian 765-kV backbone. Targeting energization by December 2028.
Grid relevance
First segment of a purpose-built 765-kV Permian backbone. A leading tell for whether ERCOT can carry the load growth its large-load queue implies. Signal type: transmission.
Last updated
2026-07-09
Sources