Ask Your Own Questions Across 300+ Plans
Halcyon-curated data are a starting point. The real power of the IRP Explorer is that you can add your own columns, asking tailored questions according to your needs. The dataset is a grid: plans are rows and questions are columns. When you add a column with your own question, Halcyon runs it across every plan in the dataset, and each answer is tied back to the underlying filing. That turns a stack of thousand-page documents into a research tool you can shape to your own work. A few examples of columns you could add:
- Load forecasting: What peak demand does the utility forecast at the end of the planning horizon, and what is the annual growth rate?
- Resource assessment: How does the utility assess the capacity value of solar, wind, and storage?
- Risk and scenario analysis: What scenarios does the plan model, and how does the preferred portfolio change under each?
- Generation retirements: Which coal, gas, and other generation units does the plan expect to retire, and in what year?
- New generation additions: How many megawatts (MW) of new gas, solar, wind, or storage does the preferred portfolio add, and when?
Each of these would normally take weeks of reading across dozens of dockets. In the IRP Explorer, it only takes a few clicks.
Data Methodology
Integrated Resource Plans have been the backbone of utility planning for decades. On a consistently irregular cadence, a utility files a plan with its state commission forecasting how much load it expects to serve, what resources it has, and what it intends to build or retire to meet that load. Some call it an IRP, others a Ten-Year Site Plan, a Multi-Year Grid Plan, or a long-term resource plan. The name changes by state, but the core question does not: how will this utility keep the lights on at a cost that's just and reasonable?
Today, that question is harder to answer. Data centers, manufacturing, and electrification are driving up load forecasts after years of flat demand, while utilities weigh coal and gas retirements, interconnection queues, supply chain constraints, and policy targets. IRPs have become one of the most important signals in the energy market. The problem is that they are long, inconsistent, and scattered: a single IRP can run thousands of pages across a main volume, appendices, and workpapers, filed under dockets that differ by commission.
The IRP Explorer is a tracker of more than 300 IRPs and comparable long-term resource plans filed since 2020. It covers both electric and natural gas utilities, and spans investor-owned utilities, municipals, and cooperatives. Every plan is identified in Halcyon's catalog of state commission filings, and every data point is reviewed by our analysts.
The Explorer comes with eight curated columns that make it easy to navigate and join to third-party datasets such as EIA. Halcyon adds new plans as utilities file them, so coverage keeps growing.
