Rick from Indianapolis. I know this is about ComEd in Illinois but figured someone here has dealt with their tariff structure. Client got a massive bill increase and I'm trying to track down all the riders and adjustments. Found at least six different riders beyond the base rates - anyone have experience with ComEd's tariff maze?
Hidden Riders in Commonwealth Edison Tariffs
Kevin O. in Kansas City. Don't work with ComEd directly but Ameren Missouri has similar issues. Look for the purchased power adjustment, environmental cost recovery, and transmission services charges. Those can add 30-40% to the base rates and they change quarterly.
Randy Dawson here. Rick, ComEd is notorious for their rider complexity. You're looking for Rider PE (Purchased Electricity), Rider EDA (Energy Efficiency and Demand Response), Rider NS (North Shore Gas), and several transmission riders. The ICC requires them to list all riders in Section 16 of their tariff books, but they're scattered across multiple schedules. ComEd's delivery charges include Rider ICR (Infrastructure Cost Recovery) which has been increasing significantly due to grid modernization investments. Also check for Rider REA (Renewable Energy Adjustment) - that's been volatile lately with Illinois RPS requirements. Your best bet is to pull the actual bill and match each line item to the tariff schedules.
Clifford H. from Duluth. Similar mess with Minnesota Power up here. Rick, make sure you're looking at the right effective dates for those riders - some change monthly, others quarterly. The ICC website has a rider tracking tool that shows historical changes.
Eddie K. in North Las Vegas. Had this issue with NV Energy. Found out they were applying riders that expired six months earlier. Always check the ICC docket numbers and effective dates. Sometimes utilities mess up their own rider applications.
Update - found the problem. ComEd was applying Rider EDA at the old rate even though ICC approved a reduction in December. Bill impact was $1,847 monthly overcharge. Randy, your suggestion about matching bill line items to tariff sections was spot-on. Thanks everyone.