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​TSR Study and Expansion Process

​The TSR Study and Expansion Process (TSEP) is BPA’s process to manage and respond to long-term firm transmission requests on the BPA network. TSEP was formerly known as Network Open Season (NOS).

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To request previously posted materials, send an email to with your name, company, and email address.

Common Documents
TSEP Business Practice
Notice of Extension of 2016 Cluster Study (01/30/2017)
Notice of 2016 Cluster Study Decision (6/30/2016)
Advance Notice of 2016 Cluster Study and Information on Timeline and Eligibility for Participation (5/17/16)
TSEP Process Design (05/17/16)
NT Data Exhibit (06/01/16)
PTP Data Exhibit (06/01/16) 

Related Links
Business Practices
Open Access Transmission Tariff
Transmission Project Page
ATC Methodology