Large Generator Interconnection (LGI)

A Large Generating Facility, i.e., a device that produces electricity or stores electricity for later injection, with a capacity of more than 20 MW is interconnected to the Federal Columbia River Transmission System (FCRTS) under Attachment L of BPA's Open Access Transmission Tariff (OATT)

BPA's Transition to Cluster Study Procedures (Attachment R of BPA's OATT)

As of June 30, 2024, tariff reforms took effect outlining a transition from a serial interconnection process to a clustered study process for the interconnection of Large Generating Facilities. Transition Requests are now being studied in the Transition Process under Attachment R of BPA OATT. For more info, see the Transition Process Business Practice.

Cluster Study Procedures (Attachment L of BPA OATT)

After the Transition Cluster Study is complete BPA will begin the first post-transition Cluster Study. After the transition, new Interconnection Requests for Large Generating Facilities will be studied in the standard Cluster Study procedures outlined in Attachment L of BPA OATT. For more info, see the Large Generator Interconnection Business Practice.

Surplus, Repower or Replacement

Surplus Interconnection Service Requests, Repower Requests, or Replacement Requests have distinct procedures outlined in Attachment L of BPA OATT.