Gail R. from Albany NY. I'm working on testimony for a National Grid rate case and need to track their Schedule SC-2 small commercial rates going back to 2008. The current PSC website only has tariffs back to 2010, and I need to show the progression of both energy charges and customer charges over the 4-year period leading up to the previous rate case. Anyone know where to find archived tariff books from New York utilities? I've tried the PSC library but their online archive is incomplete.
Finding historical tariff data for rate case testimony
Phil G. from Richmond VA. Gail, have you tried contacting the utility directly? Most utilities maintain archives of all filed tariffs going back decades, though they might charge a research fee. In Virginia, Dominion Power has been helpful providing historical rate data for regulatory proceedings. You might also check with the Office of Consumer Advocate or other intervenors in previous National Grid cases - they often maintain their own databases.
Janet K. from Cincinnati OH. The National Association of Regulatory Utility Commissioners sometimes has archived materials, though it's hit or miss. Gail, what specific data points do you need? If it's just the basic energy and demand charges, I might have some National Grid historical data from a project I worked on in 2010. Not complete tariff books but rate summaries going back to 2007.
Thanks Phil and Janet. I need the complete progression of Schedule SC-2 including customer charges, energy blocks, and any riders that were in effect. Janet, even rate summaries would be helpful to fill in gaps. I did contact National Grid and they want $150 for research fees plus copying costs. Might be worth it if I can't find the data elsewhere. The key issue is showing how customer charges increased relative to energy charges over that period.
Gail, I'll dig through my files and see what I have. The customer charge progression might be particularly interesting - I remember National Grid had some significant increases in the 2008-2009 timeframe. Let me check if I have the monthly breakdown of riders too, especially the revenue adjustment mechanism that was pretty controversial back then.