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Rate Matters
12 Months Ended
Dec. 31, 2011
Rate Matters [Abstract]  
Rate Matters
9.
Rate Matters

Recently Concluded Regulatory Proceedings - PSCW

Base Rate

NSP-Wisconsin 2011 Electric and Gas Rate Case - In June 2011, NSP-Wisconsin filed a request with the PSCW to increase electric rates approximately $29.2 million, or 5.1 percent and natural gas rates approximately $8.0 million, or 6.6 percent effective Jan. 1, 2012.  The rate filing is based on a 2012 forecast test year and includes a requested ROE of 10.75 percent, an equity ratio of 52.54 percent, an electric rate base of approximately $718 million and a natural gas rate base of $84 million.

In December 2011, the PSCW approved an electric rate increase of approximately $12.2 million or 2.1 percent, and a natural gas rate increase of $2.9 million or 2.4 percent, with new rates effective Jan. 1, 2012.  The primary reason for the natural gas rate reduction from the original request was the PSCW decision to deny NSP-Wisconsin's proposal to pre-collect certain manufactured gas plant remediation costs.  The primary reasons for the electric rate reduction were updated 2012 electric fuel costs and the delays in the Monticello nuclear plant extended life cycle management and power uprate project.  The rate increases were based on a 10.4 percent ROE and an equity ratio of 52.59 percent.