JEFFERSON CITY – The Missouri Public Service Commission has approved a filing made
by Union Electric Company d/b/a Ameren Missouri to adjust the fuel and purchased power
adjustment charge (FAC) on the bills of its electric customers.
Ameren Missouri made two filings with the Commission. In its first filing (Case No. ER-
2018-0255), Ameren Missouri proposed to adjust the FAC to reflect changes in its fuel and purchased
power costs, net off-system sales revenues and associated transportation experienced during the four
month period of October 2017 through January 2018. The second filing was Ameren Missouri’s FAC
true-up (Case No. ER-2018-0256).
For a residential customer using 1,015 kWh (kilowatt-hours) of electricity a month, the FAC
will increase by approximately $2.07 a month, from $0.27 a month to $2.34 a month. The change is
expected to take effect during the June billing month.
The fuel adjustment charge was authorized by the Commission for Ameren Missouri in a
regular rate case in 2009. The FAC tariff allows the company to pass increases or decreases in its net
fuel and purchased power costs to customers outside of a general rate case.
The FAC allows the company to recover most – up to 95 percent – of its costs, but not all, to
encourage conservation and prudence in fuel use by the company. Any charges resulting from the fuel
adjustment clause must appear in a separate category on customers’ bills.
Fuel adjustment charges are intended to help companies deal with volatility in fuel pricing.
The FAC tariff requires regular adjustments to reflect changes in prices the company has incurred for
fuel and for wholesale power purchased to serve customers.
Ameren Missouri provides electric service to approximately 1.26 million electric customers