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Enbridge explains gas purchasing mix, WexPro’s annual contribution and limits of modeling for peak‑day planning
Summary
Enbridge outlined its baseload and purchased gas portfolio, said WexPro supplies about 49% on an annual basis (not necessarily on peak days), and described modeling constraints driven by storage availability and contract access.
Enbridge Gas described its purchase‑gas portfolio, hedging approach and how WexPro production factors into annual supply and peak‑day planning at the PSC technical conference. Presenters said the company holds about 193,000 (units stated as baseload supply in the presentation) and about 264,500 dekatherms per day of purchase/dependent (presentation language) as part of its portfolio; presenters also said the average purchase price for the 2024–25 heating season was about $3.75 per unit and market indexes were nearer $4.15 in the current periods discussed. Enbridge staff clarified a recurring statistic: WexPro provides about 49% of annual company supply on an annual basis, but that percentage does not translate to peak‑day contribution. Company presenters showed modeling outputs (Plexos model) that stack WexPro production, storage withdrawals (Clay Basin, aquifers), cost‑of‑service purchases and spot purchases to meet a design day forecast of roughly 1.29 billion cubic feet. Company presenters said storage availability, not WexPro percentage, is the constraint for winter reliability. When PSC staff asked whether the company could rely more on storage rather than market purchases, Enbridge said it is evaluating additional storage options — including developing new on‑system storage — and that the Plexos runs are constrained to storage contracts the company actually holds; analysts rerun scenarios when new storage or contractual options are available. On price comparisons, Enbridge showed monthly average cost accounting procedures rather than molecule‑level tracing; company staff said they do not track individual molecules from WexPro into specific storage injections but model monthly average costs for storage accounting. Presenters also discussed Kern River and Mountain West contract timing and an additional 25,000 dekatherms per day of new capacity from Kern River that is expected to begin in late 2026 depending on project completion schedules.
