Rate Case Tracker update is live 15 new rate cases. 289 total. And a new lens worth paying attention to: every utility now links to its active large load tariff proceedings. Three to watch: - LPHLDS in Arkansas - XHLF / AG-X in Arizona - Electric Rule 30 in California Learn more? Link below

Major update to our New Substation Development Tracker yesterday: PJM is in. Every substation upgrade signals where the data center, manufacturing, and electrification load is landing. +1,660 projects → 2,105 total across 5 regions. Link in comments 👇

Enterprises have a system of record (data) and a process of record (decisions). Missing? per @nathanielbullard.com: a system of action — an activation layer that turns unstructured info into workflow inputs. Agents alone won't cut it. Context-aware activation will Learn more: hubs.la/Q04hlFR80

Halcyon's Gas Power Plant Tracker: 278 planned U.S. gas plants, 167 GW, 44 data points each, updated monthly. Yesterday's update: 34 new plants, 163 total changes. Newly added — South Valley Gas Power Generation Facility, 144 MW of reciprocating engines. Link 👇

Halcyon’s Large Load Tariff Tracker: 152 tariffs across data centers, telecom, and crypto-miners. Minimum contract lengths have nearly 4x'd: 2.6 years pre-2024 → 9.5 years post-2024. 15- and 20-year terms are now common. Learn more? Link in comments below.

Halcyon's Rate Case Tracker: 276 IOU rate cases, 51 data points each, updated monthly. Requested vs. authorized ROE: utilities rarely get their ask — almost every dot sits below parity. Florida Power & Light asked 11.90%, got 10.95% — a 95 bps cut. Link 👇

Speed to power is the question dominating AI infrastructure. A few weeks ago, we hosted Time to Power, which brought together hyperscalers, developers, and capital allocators to wrestle with the question: how much power do we actually need? Today, we’re sharing the full recording. Footage below👇️

Halcyon's Large Load Tariff Tracker covers 152 tariffs across data centers, advanced manufacturing & large industrial loads — with this month's update dropping later today. Thresholds have surged — pre-2022 targeted 5–30 MW. Most now sit at 50–100 MW, with outliers at 150 and 250 MW. Link 👇

Halcyon’s Rate Case Tracker: 276 IOU rate cases, 51 data points each, updated monthly. Utilities consistently ask for more than they get. Requested WACC peaked at 7.6% in 2026 — authorized has held closer to 7.0%. A persistent 30–50 bps gap. Learn more? Link in comments below.

Data centers are driving load growth utilities haven't seen in decades. Large load tariffs are now the main tool for allocating costs—but designs vary wildly. New whitepaper from E3 + Halcyon uses our Large Load Tariff Tracker to show how these tariffs hit real bills. Link 👇

Halcyon Curated Alert: Gas Plant Repower, Repair, Uprate, License Extension This week: → SWEPCO converting Welsh Units 1 & 3 to natural gas (TX PUC) → BGE: $1.7M to replace aging gas distribution assets (AZ CC) Subscribe → link in comments 👇

The Halcyon Gas Power Plant Tracker covers 247 planned US gas plants — 153 GW, updated monthly. The big story: 2028–2029 sees ~37 GW of new gas come online — nearly a quarter of the entire pipeline in two years. Learn more? Link in comments below 👇

@pjminterconnection.bsky.social's new capacity market reform report leans on project-cost data we co-produced with GridLab and Energy Futures Group — calling it "the most granular and current dataset of its kind." Underlying figures: Halcyon's Gas Power Plant Tracker. Links 👇

Halcyon’s BESS Tracker covers 648 US battery storage projects — 92.7 GW, 289 GWh, updated monthly. Looking at cost per kW: Green River Energy Center Hybrid stands out. 400 MW online May 2026 at $2,500/kW. One of the biggest capacity projects in the pipeline. Link👇

Speed to power ≠ need for power. Need: $1.1T hyperscaler capex for 2027. $1.1T already contracted at just Google + @microsoft.com. Speed: 8-year @PJM queues. Capacity auctions at the top. Gas turbines sold out thru 2030. The gap is widening. New from @nathanielbullard.com 👇

The Halcyon Gas Power Plant Tracker covers 247 planned US gas plants — 153 GW, updated monthly. Fermi America Project Matador stands out: 6,000 MW combined-cycle in West Texas, newly added. Most large gas plants in the pipeline are 500–1,500 MW. Matador is ~4x that. Link in comments 👇

Halcyon’s Battery Energy Storage System (BESS) Tracker now covers 648 US battery storage projects — 92.7 GW, 289 GWh. Sierra Solar Hybrid stands out: 1,600 MWh online July 2026 priced approximately at $450/kWh. One of the largest projects in the pipeline, priced right in the median cluster. Link👇

Halcyon Curated Alert: Data Centers | TX Monitor data center development across TX. ERCOT projects 410 GW of large-load demand by 2030, a 6x jump from 2025 driven by hyperscale data centers — even as proposed Oracle and OpenAI campuses in Abilene get abandoned. Subscribe! Link in comments 👇

Halcyon Curated Alert: Gas Power Repower, Repair, Uprate, Extension Monitor gas plant repowers, repairs, uprates, and license extensions across the U.S. DTE Electric is putting $10.8M+ into hot gas path overhauls on four Dean Peaker units in Michigan, with work running 2027–2028. Link👇

Halcyon Alert: Utility Bond + Credit Rating PG&E's 2027 GRC: intervenors flagging "stranded" grid investment risk from data center + hospital interconnections. Subscribe! Link in comments👇

FERC was supposed to issue a final rule on large-load interconnection by April 30. Punted to June. But the questions that actually determine data center project risk live at state PUCs anyway — and 5 states already moved. Halcyon advisor, Sharon Reishus, breaks it down. Link in comments 👇

Halcyon Curated Alert: EV Infrastructure + Programs Fast charging, V2G, and NEVI/CFI funding updates. This week: 🔌 National Grid advancing 3 MA substations for EV highway charging 🚌 Hawaiian Electric: $136K on EBus Pilot, $367K on Charge Ready Hawaii Subscribe! Link in comments👇

The U.S. data center pipeline is now larger than the entire U.S. peak load. Our grid wasn’t built for this. Halcyon's @nathanielbullard.com joins @latitudemedia.bsky.social on why constraints — not ambition — will decide which projects actually get built. Full article👇 halcyon.io/newsroom/the...

The grid’s physical realities are setting in for the data center pipeline

Nat Bullard joins Derek Thompson on Plain English to explore how the Iran conflict and the AI boom are, at their core, both fights over energy — and what that means for the future of global power.

halcyon.io

Halcyon Curated Alert: Renewable Curtailments This alert tracks every reported renewable curtailment across the U.S. — where, when, how much, and how grid operators and utilities are managing it. Subscribe now! Link in comments. Recent filings show:

Halcyon Curated Alert: Data Centers | Virginia Tracking every data center filing landing at the Virginia State Corporation Commission and the Virginia Department of Environmental Quality. Subscribe now! Link in comments 👇

Halcyon Curated Alert: Large Loads – Northeast We track every data center and large load development across Northeast PSCs — Commission orders, new proceedings, tariff proposals, and co-location provisions. Keep up, subscribe now! Link in comments 👇

Halcyon Curated Alert: Data Centers | WI We track every Wisconsin PSC filing that touches data center development. Case in point: ATC just filed a CPCN application for the Ozaukee County Distribution Interconnect Project — 90–107 miles of new transmission lines. Subscribe now! Link in comments 👇

Halcyon Curated Alert: Cybersecurity Investment Utility cybersecurity spend is quietly ramping across the U.S. — we track approved, upcoming, and completed investments. Keep up, subscribe now! Link in comments 👇

Halcyon Curated Alert: Large Load ESAs Large load electric service agreements are long-term utility contracts (12–15+ years, often 100 MW+) with data centers and heavy industry. Track these coming in from around the U.S. Keep up, subscribe now! Link in comments 👇

Halcyon Curated Alert: Large Load Electric Service Agreements Large load electric service agreements are long-term utility contracts (12–15+ years, often 100 MW+) with data centers and heavy industry. Track these coming in from around the U.S. Keep up, subscribe now! Link in comments 👇