Randall O. from Kansas City. I'm working on a rate case analysis for a client and need to find historical Evergy rate schedules going back to 2018. Their current website only shows tariffs back to 2020. Anyone know where to dig up older versions? I've tried the Missouri PSC website but their search function is terrible.
Finding historical tariffs for rate case analysis
Don A. from St. Paul here. Try the PSC's electronic filing system directly - EFIS I think it's called in Missouri. Utilities have to file tariff revisions there and you can sometimes find the older versions in the docket history. Also check if they have a tariff library section separate from the main docket search.
Randy Dawson here. Don's on the right track with EFIS. For Missouri PSC, you want to look for tariff sheet filings in the utility's general rate case dockets. Evergy Missouri West would be docket numbers starting with "EW" and East would be "EO". The tariff sheets are usually filed as exhibits in rate cases, but they also file individual tariff revisions throughout the year. Another option is to contact Evergy directly - their regulatory affairs department sometimes maintains historical tariff libraries that aren't published online. I've had good luck calling their tariff department and explaining you need historical rates for a legitimate business analysis.
Thanks Don and Randy! I found EFIS and it's a bit clunky but I can see the older filings. Randy, do you remember roughly when Evergy's last major rate case was? I'm trying to narrow down the search timeframe to avoid going through hundreds of docket entries.
Theresa K. from Bozeman. Not sure about Evergy specifically, but most utilities file general rate cases every 3-4 years. If you're looking at 2018 data, there was probably a case filed around 2017-2018 timeframe. Sometimes the state PUC websites have a rate case calendar or timeline that shows major filings by utility.
Randall, Evergy Missouri West's last major rate case before the current timeframe was filed in late 2017 I believe, with rates effective in mid-2018. Look for docket ER-2018-0145 for the West territory. East territory had a separate case around the same time. The merger between Kansas City Power & Light and Westar complicated things, so make sure you're tracking the right legal entity names in your search.
Found it! Docket ER-2018-0145 had exactly what I needed. The tariff sheets were buried in the exhibits but I got the 2018 Rate Schedule LGS that I was looking for. Randy, you're a lifesaver. This rate case analysis is going to show some significant impacts from the recent increases.
Eugene W. from Columbus. This thread is great timing. I'm doing similar historical research for AEP Ohio. Anyone know if their tariff filing system works similarly? The PUCO website layout is completely different from Missouri.
Bernard P. from Roanoke. Eugene, Virginia SCC has a similar system called "Document Filing System" or DFS. Not sure about Ohio specifically, but most state commissions have electronic filing systems now. Try searching for "tariff" or "rate schedule" in their docket search and filter by utility name.