What happened in this Energy story?

New York ISO senior vice president Zach Smith argues the grid operator's independence proved decisive when the Champlain Hudson Power Express transmission line went offline during July's record heatwave, validating NYISO's decision to plan conservatively rather than assume the new line would deliver on schedule.

What is a key fact in this story? (1)

**NYISO** issued a spring forecast showing New York's electric grid was entering summer with its slimmest reliability margin in recent history, prompting the operator to forestall the retirement of aging peaker plants already scheduled to deactivate.

What is a key fact in this story? (2)

**Champlain Hudson Power Express (CHPE)**, a transmission line built to deliver Canadian hydropower to New York City, was excluded from summer reliability projections because it was unlikely to enter service on schedule; the line is designed to supply 1,250 MW to New York City during peak demand.

NYISO's Conservative Call Held Up in July Heatwave — SkimNews

By Utility Dive · Summarized & edited by Kapil Samant · 2026-09-11

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NYISO issued a spring forecast showing New York's electric grid was entering summer with its slimmest reliability margin in recent history, prompting the operator to forestall the retirement of aging peaker plants already scheduled to deactivate.
Champlain Hudson Power Express (CHPE), a transmission line built to deliver Canadian hydropower to New York City, was excluded from summer reliability projections because it was unlikely to enter service on schedule; the line is designed to supply 1,250 MW to New York City during peak demand.
CHPE suffered outages during the Independence Day heatwave — one of the most challenging reliability tests New York has faced in years — including a shutdown on July 4 while the system was under elevated stress.
Multiple unexpected generator outages further strained grid conditions during the heatwave, but New York's grid remained reliable because operators had anticipated tight reserves, evaluated resource availability, coordinated with neighboring systems, and prepared contingency measures in advance.
NYISO, established in 1999, is governed by an independent Board of Directors with no financial ties to market participants and is overseen by state and federal regulators, a structure designed to insulate grid decisions from commercial and political pressures.
The July heatwave underscored the need for immediate investment in new generation and transmission, according to Smith, since equipment failures are as inevitable as the next extreme weather event.

Why it matters: NYISO's refusal to assume full CHPE availability — and its decision to keep aging peaker plants online — directly cushioned New York against a double failure: CHPE went offline on July 4 and multiple generators simultaneously failed during the heatwave. The episode hands grid planners a concrete data point showing that conservative reserve assumptions can be the difference between brownouts and business-as-usual when new infrastructure and legacy resources both stumble at once.