Large-Load & RTO Tariff Tracker

This tracker consolidates EPG Solutions coverage of FERC's large-load proceedings and the six organized-market tariff reviews. It connects daily updates on data-center interconnection, co-location, study reform, cost allocation, flexible-load service and filing deadlines.

Last reviewed: August 24, 2026
Coverage through: August 24, 2026

What this tracker covers

FERC Section 206 show-cause proceedings
PJM, MISO, SPP, CAISO, ISO-NE and NYISO tariff reviews
Large-load study speed, cost allocation and co-location
Generation adequacy and flexible-load service

Grid Pulse coverage timeline

Grid Pulse | June 3, 2026 — FERC's Large Load Ruling Is Due This Month: The Clock Is Running on RM26-4
FERC committed to act by June's end in Docket RM26-4 on large-load interconnection, while NERC's computational-load responses are due August 3.
Grid Pulse | June 4, 2026 — FERC's Large Load Rule Is Due This Month. The Clock Is Running on RM26-4.
FERC's June action window for Docket RM26-4 could reshape how data centers and other loads above 20 MW are studied, connected and assigned upgrade costs.
Grid Pulse | June 8, 2026 — FERC's Large-Load Interconnection Rule Comes Due This Month
FERC's June 2026 action window for Docket RM26-4 could change studies for loads over 20 MW, including faster paths for flexible, curtailable demand.
Grid Pulse | June 13, 2026 — FERC's Self-Imposed Deadline on Large-Load Rules Lands at the June 18 Open Meeting
FERC's June 18, 2026 open meeting fell within its stated window to act on Docket RM26-4 and large-load interconnection rules affecting 20+ MW data centers.
Grid Pulse | June 17, 2026 — FERC's June Deadline Arrives on Large-Load Interconnection Reform
FERC's June deadline for Docket RM26-4 could reset how 20 MW-plus loads are studied and connected as NERC's August 3 alert deadline approaches.
Grid Pulse | June 18, 2026 — FERC's Large Load Deadline Lands at Today's Open Meeting
FERC's June 18 open meeting was the last scheduled meeting in its RM26-4 action window for interconnecting data centers and other loads over 20 MW.
Grid Pulse | June 19, 2026 — FERC Orders All Six RTOs to Justify or Reform Large-Load Tariffs in 60 Days
FERC gave PJM, MISO, SPP, CAISO, ISO-NE and NYISO 60 days to defend or revise large-load tariffs, plus 30 days to report on generation adequacy.
Grid Pulse | June 20, 2026 — FERC Puts All Six Grid Operators on the Clock for Large Loads
Six grid operators face FERC reviews of study processes, cost shifting, co-location, flexible-load service and nearby generation under Section 206 orders.
Grid Pulse | June 21, 2026 — FERC Hits All Six RTOs With Show Cause Orders on Large Load Rules
FERC's show cause orders in dockets EL26-67 through EL26-72 give all six RTOs and ISOs 60 days to defend or change their large-load tariffs.
Grid Pulse | June 22, 2026 — FERC Puts All Six RTOs on the Clock Over Large-Load Rules
FERC's Section 206 action asks six grid operators to address study speed, cost transparency, co-location, flexible loads and nearby generation in 60 days.
Grid Pulse | June 23, 2026 — FERC Orders All Six RTOs to Justify or Rewrite Their Large-Load Rules in 60 Days
FERC's June 18 orders give PJM, MISO, SPP, CAISO, ISO-NE and NYISO 60 days to justify or rewrite rules for data centers and other large loads.
Grid Pulse | June 24, 2026 — FERC Puts All Six RTOs on the Clock Over Large-Load Tariffs
FERC opened six show-cause dockets at its June 18 meeting, requiring organized markets to defend existing tariffs or file large-load reforms in 60 days.
Grid Pulse | June 25, 2026 — FERC Starts the Clock on Large-Load Tariffs
FERC set a 60-day tariff deadline for all six RTOs and ISOs, plus a 30-day report on generation available to serve existing and new large loads.
Grid Pulse | June 27, 2026 — FERC Gives the Six RTOs 60 Days to Fix Their Large-Load Rules
FERC's six show cause orders target interconnection studies, cost allocation, co-location, flexible-load service and generation serving nearby large loads.
Grid Pulse | June 28, 2026 — FERC's 60-Day Clock on Large Loads Is Now Running for All Six RTOs
FERC's June 18 orders put all six jurisdictional RTOs and ISOs on a mid-August deadline to justify current large-load tariffs or propose reforms.
Grid Pulse | June 29, 2026 — FERC Issues Show Cause Orders to All Six RTOs on Large Load Integration
FERC's June 18 orders set July reporting and August tariff deadlines for six RTOs, with five reform areas for integrating data centers and other large loads.
Grid Pulse | June 30, 2026 — FERC's 60-Day Clock on Large Loads Is Now Running
FERC's Section 206 orders put PJM, MISO, SPP, ISO-NE, NYISO and CAISO on a mid-August deadline to defend or rewrite their large-load tariffs.
Grid Pulse | July 10, 2026 — ERCOT's Old Large Load Study Process Dies Tonight. Batch Zero Goes Live Tomorrow.
ERCOT's Batch Zero process takes effect July 11, 2026, replacing individual large-load studies with a system-wide batch approach under PGRR145 and NPRR1325.