TADS efforts began in 2006 with the formation of the TADS Task Force under the NERC Planning Committee. This task force designed TADS and the associated processes for collecting TADS data. On June 30, 2009, the task force issued its first reports for data collected in 2008. On July 1, 2009, the task force was retired and replaced with the TADS Working Group. This change recognized the ongoing design and oversight of TADS that is more appropriately assigned to a working group than a task force. NERC uses the information to develop transmission metrics that analyze outage frequency, duration, causes, and many other factors related to transmission outages.
In 2020, the TADS Working Group became the TADS User Group
(TADSUG). The TADSUG performs the
same functions as the TADSWG. However, it no longer reports into the NERC
Committee structure. Instead, it reports to the NERC Performance Analysis
While TADS is not intended to provide determinative performance measures, it is used to quantify certain performance aspects. In addition to collecting simple transmission equipment availability, TADS will collect detailed information about individual outage events that, when analyzed at the regional and NERC level, will provide data that may be used to improve reliability.
For more information, please contact firstname.lastname@example.org
NERC and OATI are aware of the validation error message regarding Joint TO Element IDs and working to implement a solution.
Refer to TADS Multi-Owner Inventory Update Instructions on completing your checklist.
Quarter 3 deadline is being extended to February 15, 2023. More information is provided in the TADS 2022 Form 2 Update.
Subscribe to TADS User Group Distribution ListPlease include “Please add me to the TADS User Group Distribution List" in the subject line.
Deadlines for Data Submission into WebTADS are:
*When a deadline falls on a weekend or holiday, reporting will be extended through the following business day.
OATI - How to set up an account
OATI TADS NERC Portal login
Transmission Availability Data System User Group (TADSUG)
Data Quality Control Process
TADS Phase II Final Report
TADS Section 1600 Data Request Planned Outages
Element Inventory Dashboard
Sustained Outages by Cause Code Dashboard
Momentary Outages by Cause Code Dashboard
Momentary and Sustained Outages by Month Dashboard
TADS Dashboard Supporting Data
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Group Health Plan Transparency in Coverage Files*
*This link leads to the machine-readable files that are made available in response to the federal Transparency in Coverage Rule and includes negotiated service rates and out-of-network allowed amounts between health plans and healthcare providers. The machine-readable files are formatted to allow researchers, regulators, and application developers to more easily access and analyze data.