National Electric Transmission Congestion Study

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Section 1221(a) of the Energy Policy Act of 2005, codified at 16 U.S.C. 824p(a), directs the Secretary of Energy to conduct an electric transmission congestion study every three years, and to prepare it in consultation with affected states and regional reliability organizations. In the study, the Department seeks to provide information about transmission congestion by focusing on specific indications of transmission constraints and congestion and their consequences. The study focuses on a specific time frame – e.g., historical trends over the past few years, and looking forward three to five years. The study is based entirely on publicly-available data and transmission-related documents.

2019 Congestion Study

In preparation for the 2019 congestion study, DOE published a Notice of “Procedures for Conducting Electric Transmission Congestion Studies” in the Federal Register in August 2018 and requested written comments by October 9, 2018. DOE is extending the comment period by fifteen days. Written comments must now be received on or before October 24, 2018. If you wish to file comments in response to the Federal Register notice, please e-mail them to congestion.study2018@hq.doe.gov or send them to the Office of Electricity, OE-20, U.S. Department of Energy, 1000 Independence Avenue SW, Washington, DC 20585. 

The following electronic file formats are acceptable: Microsoft Word (.doc), Corel Word Perfect (.wpd), Adobe Acrobat (.pdf), Rich Text Format (.rtf), plain text (.txt), Microsoft Excel (.xls), and Microsoft PowerPoint (.ppt). The Department intends to use only data that is publicly available for this study. Accordingly, please do not submit information that you believe is or should be protected from public disclosure. DOE is responsible for the final determination concerning disclosure or nondisclosure of information submitted to DOE and for treating it in accordance with the DOE's Freedom of Information regulations (10 CFR 1004.11). All public comments received by DOE in response to the Federal Register Notice are being posted HERE.

Information about previous congestion studies is available HERE.

Annual U.S. Transmission Data Review

The U.S. Department of Energy (DOE) has broad responsibility for developing and supporting the implementation of energy policies that serve the public interest. Ensuring that timely and accurate data on key subjects is widely available to the public is one of those responsibilities. With that responsibility in mind, the Office of Electricity releases an Annual U.S. Transmission Data Review, its compilation of transmission-related data focusing on six areas:  transmission infrastructure, transmission reliability, transmission utilization, transmission constraints, transmission planning, and economic congestion. This data, which is gathered from publicly-available sources, is used to inform various DOE analyses, including OE’s triennial transmission congestion studies. The report does not draw conclusions about the transmission system—it is, instead, an effort to gather publicly available data in one place and to present it in a unified framework as comparably as possible.

The 2018 Annual U.S. Transmission Data Review is available HERE. The 2016 Annual U.S. Transmission Data Review is available HERE. The 2015 Annual U.S. Transmission Data Review is available HERE.