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Rate Matters Rate Matters (Tables)
 12 Months Ended
Dec. 31, 2016
Public Utilities, General Disclosures [Abstract]  
NSP-WI 2017 Electric Rate Request [Table Text Block]
The differences between NSP-Wisconsin’s original electric rate request and the PSCW’s approved electric increase are summarized below:
Electric Rate Request (Millions of Dollars)
 
NSP-Wisconsin Request
 
Final Decision
Rate base investments
 
$
11.0

 
$
7.6

Generation and transmission expenses (excluding fuel and purchased power) (a)
 
6.8

 
6.1

Fuel and purchased power expenses
 
11.0

 
10.7

Subtotal
 
28.8

 
24.4

2015 fuel refund (b)
 
(9.5
)
 
—

Department of Energy settlement refund
 
(1.9
)
 
(1.9
)
Total electric rate increase
 
$
17.4

 
$
22.5


(a) 
Includes Interchange Agreement billings. For financial reporting purposes, these expenses are included in O&M.
(b) 
In July 2016, the PSCW required NSP-Wisconsin to return the 2015 fuel refund directly to customers, rather than using it to offset the proposed 2017 rate increase, as originally proposed by NSP-Wisconsin. This decision, when combined with the increase in forecasted fuel and purchased power expense, effectively increased NSP-Wisconsin’s requested electric rate increase to $29.9 million, or 4.2 percent.