This page provides information dedicated to helping customers, contractors and vendors conduct business transactions with BPA, to include: buying and selling products or services, submitting invoices, forms, paying BPA, and BPA's Business Code of Conduct for Contract Personnel.
Environmental Services works closely with numerous Federal and State agencies, Tribes, landowners, and the public to protect and recover endangered species, protect and preserve our cultural resources, and reduce impacts to wetlands, air, water, and the human environment.
BPA supports over 15,000 miles of transmission lines as well as additional fish and wildlife habitat across Washington, Oregon, Montana, Idaho, Wyoming and California. This section provides commonly requested information.
TTSL is an approximation of loading on any part of the BPA transmission system, based on federal and non-federal generation within the BPA control area, and interchange and wheeling onto the system. It is unadjusted for temperature or streamflow conditions. The date and time of the monthly TTSL peak is used for billing purposes. TTSL is not a typical "end-use" load measure, and is not used as a "system load" measure for any formal regulatory reporting. TTSL data are unavailable prior to 1/1/07.