Transmission Business Practices

Effective 4/21/2025

BPA Transmission Business Practices Acronyms and Glossary

Version 2 - Effective 10/1/2021

Balancing Reserve Capacity

This business practice establishes the methodology for determining the amount of capacity for Balancing Reserves that BPA will supply.

Version 7 - Effective 3/14/2025

Balancing Service Election for DERBS and VERBS

The Balancing Service Election for DERBS and VERBS Business Practice applies to the Dispatchable and Variable Energy Resources operating in the BPA Balancing Authority Area. This business practice describes the requirements for Dispatchable and Variable Energy Resources to make their elections for Balancing Services for the upcoming rate period.

Version 5 - Effective 10/1/2021

Balancing Services Resources Prequalification

The Balancing Services Resources Prequalification Business Practice describes how a potential supplier of Balancing Services from a non-federal resource that wishes to supply Balancing Services must be approved in advance of supplying such services.

Version 1 - Effective 6/30/24

Commercial Readiness

This business practice describes the Commercial Readiness requirements for Interconnection Requests in the Standard Large Generator Interconnection Process (LGIP) and the Large Generator Interconnection Transition Process.

Version 29 - Effective 10/28/2024

Conditional Firm Service (CFS)

This business practice describes the eligibility requirements for Conditional Firm Service (CFS), clarifies the different types of CFS offers, provides e-Tag and Curtailment information, and describes the operational attributes of CFS.

Version 1 - Effective 9/28/2023

Conditional Firm Service (CFS) Reconsideration Pilot

This business practice describes the requirements and process for a temporary pilot program to allow Customers to request reconsideration of eligible Transmission Service Requests (TSRs) for Conditional Firm Service (CFS).

Version 2 - Effective 4/13/2022

Consolidation of Transmission Service

This business practice explains the criteria and requirements to complete a Consolidation of 
Point-to-Point (PTP) Transmission Service on the Open Access Same-Time Information System 
(OASIS).

Version 4 - Effective 11/24/2021

Dynamic Transfer Limits Operating Procedures for Use of Upper and Lower Transfer Limits on BPA’s Transmission System

This business practice governs the use of Upper and Lower Transfer Limits on BPA managed paths during periods that BPA is not in the Energy Imbalance Market (EIM).

Version 1 - Effective 12/4/24

Dynamic Transfer Pilot

This business practice describes the process for seeking to implement a Dynamic Transfer on the BPA Eastern Intertie and the Pacific DC Intertie (PDCI) and identifies how requests are evaluated and granted.

BPA is offering this pilot for Dynamic Transfers on the BPA Eastern Intertie and the PDCI. The pilot implementation will begin on the Eastern Intertie as described in this business practice. Once BPA is able to allow Dynamic Schedules on the PDCI, the pilot will expand to include the PDCI, and the business practice may be updated as necessary.

Version 5 - Effective 5/30/23

Energy Imbalance Market (EIM)

• Intrachange Imbalance Settlement Example

This Energy Imbalance Market (EIM) Business Practice sets forth the detailed processes and procedures necessary to comply with the provisions of the BPA Open Access Transmission Tariff (OATT) to implement participation in the EIM.

Version 5 - Effective 6/30/2024

Generation Integration Services

This business practice provides the procedures and requirements for generators operating in the BPA Balancing Authority Area (BAA) to provision Generation Integration Services from BPA.

Version 12 - Effective 6/30/2024

Large Generator Interconnection

This business practice clarifies the processes and procedures that are necessary to comply with Attachment L of the Bonneville Power Administration’s (BPA) Open Access Transmission Tariff (OATT). 

Version 1 - Effective 6/30/2024

Large Generator Interconnection Procedures Dispute Resolution Process

This business practice describes the dispute process under BPA’s Standard Large Generator Interconnection Procedures (LGIP).

Version 1 - Effective Date 6/30/2024

Transition Process

This business practice clarifies the processes and procedures that are necessary to comply with Attachment R of the BPA Open Access Transmission Tariff (OATT) for Large Generator Interconnection Requests already in the BPA interconnection queue to transition from the serial study process to a cluster study process.

Version 15 - Effective 4/25/2024

Network Integration (NT) Transmission Service

The Network Integration (NT) Transmission Service Business Practice outlines processes and procedures specific to Network Integration Transmission (NT) Service.

Version 6 - Effective 10/4/23

Preemption of Short-Term Transmission Service

This business practice outlines the Preemption process BPA uses to manage reservation priority for the Short-Term market, which includes Hourly service.

Version 14 - Effective 7/9/2024

Redispatch & Curtailment Procedures

This Business Practice describes the Redispatch and Curtailment Procedures used to mitigate transmission system overloads and other reliability-related problems.

Version 48 - Effective 3/14/2025

Requesting Transmission Service

This business practice describes the process and guidelines for requesting Point-to-Point (PTP) or Network Integration (NT) Transmission Service from BPA on the Open Access Same-Time Information System (OASIS).

This business practice describes simultaneous submission eligibility, capacity allocation, the duration and treatment of requests, and lottery allocation methodology for Point-to-Point (PTP) Transmission Service Requests (TSRs) that are equal in priority.

Version 1 - Effective 6/30/2024

Site Control

This business practice describes the Site Control requirement for Standard Large Generator Interconnection Procedures (LGIP).

Version 6 - Effective 10/1/2021

Small Generator Interconnection

Version 2 - Effective 11/6/2024

Southern Intertie Study Process

This business practice describes the requirements and processes for conducting studies to increase capacity on the Southern Intertie.

This business practice describes the process for submitting Economic Study requests, submittal of required customer information, and procedures for protecting and accessing Confidential Information during the BPA Planning Process.

Version 10 - Effective 1/22/2024

TSR Study and Expansion Process 

This business practice describes the BPA Transmission Service Request (TSR) Study and Expansion Process (TSEP) and provides information regarding requirements for Customer requests for individual study of TSRs.

Version 2 - 3/10/22 

Variable Energy Resource Balancing Service (VERBS)

This business practice describes the Variable Energy Resource Balancing Service (VERBS) and clarifies its application. Included in this business practice is a description of how BPA will provide each Variable Energy Resource (VER) in the BPA Balancing Authority Area with the schedule value that meets the accuracy standard for each hour.