OATT Core Concepts

Open Access Transmission Tariff (OATT)

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Definition

The pro forma tariff required by FERC Order 888 that obligates transmission providers to offer non-discriminatory, open access to their transmission systems under comparable terms and conditions. The OATT establishes the rates, terms, and conditions for transmission service and separates (unbundles) transmission from generation services. It is the foundational document governing how utilities provide transmission service to all eligible customers on the same basis they provide it to their own generation affiliates.

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Topic Deck

OATT Core Concepts

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Source

FERC Pro Forma OATT / LGIP

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Related Terms in OATT Core Concepts

Affiliate

With respect to a corporation, partnership or other entity, each such other...

Annual Transmission Costs

The total annual cost of the Transmission System for purposes of Network Integration...

Applicable Laws and Regulations

All duly promulgated applicable federal, state and local laws, regulations, rules,...

Application

A request by an Eligible Customer for transmission service pursuant to the provisions...

Business Day

Monday through Friday, excluding Federal Holidays. Business Day is the standard unit...

Calendar Day

Any day including Saturday, Sunday, or a Federal Holiday. Calendar Days are used...
View all 36 terms in OATT Core Concepts →