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Overcharging customers on interim rates
- Updated: December 31, 2012 - 6:37 PM
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Minnesota electric and gas customers were temporarily overcharged on interim rates in nine out of 10 cases since 2008. Interim rates are granted almost automatically to utilities during the months a rate increase request is under regulatory review. Any overcharges are refunded with interest after final rates are approved.
Note: Dollars in millions Interim Approved Percent
Company Year increase increase refunded
Minnesota Power (E) 2008 $36.4 $15.2 58%
Xcel Energy (E) 2008 $150.5 $103.9 31%
CenterPoint Energy (G) 2008 $77.2 $61.5 20%
Minn. Energy Resources (G) 2008 $26.2 $20.8 21%
Xcel Energy (G) 2009 $14.4 $9.5 34%
Minnesota Power* (E) 2009 $32.8 $36.1 -10%
Otter Tail Power Co. (E) 2010 $6.3 $2.4 62%
Interstate Power Co. (E) 2010 $17.7 $14.1 21%
Xcel Energy (E) 2010 $153.7 $76.8 50%
Minn. Energy Resources (G) 2010 $9.8 $7.80 21%
Note: (E) electric rates; (G) gas rates
*Interim rate decision on appeal before Minnesota Supreme Court.
Source: Minnesota attorney general
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