Xcel Energy 2007 Annual Report Download - page 59

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The following summarizes the components of the changes in base electric utility revenues and base electric utility
margin for the years ended Dec. 31:
Base Electric Utility Revenues
2007 vs. 2006
(Millions of Dollars)
PSCo electric retail rate increase ...................................... $112
Retail sales growth (excluding weather impact) ............................. 49
Transmission revenues ............................................ 32
MERP rider .................................................. 29
Conservation and non-fuel riders (partially offset in O&M expense) ............... 26
Miscellaneous revenues (partially offset in O&M expense) ...................... 17
Estimated impact of weather ........................................ 16
Firm wholesale ................................................. 15
Fuel and purchased power cost recovery ................................. (66)
Other ...................................................... (6)
Total increase in base electric utility revenues ............................ $224
2007 Comparison with 2006 — Base electric utility revenues increased due to a PSCo electric retail rate increase,
weather-normalized retail sales growth of approximately 1.7 percent, higher transmission revenues, higher recovery from
the MERP rider, which recovers financing and other costs related the MERP construction projects and higher
conservation and non-fuel rider recovery, mostly from the RESA and DSM riders at PSCo. Lower fuel and purchased
power costs, largely recovered from customers, partially offset the positive variances.
2006 vs. 2005
(Millions of Dollars)
NSP-Minnesota electric rate changes ................................... $129
Fuel and purchased power cost recovery ................................. 61
Sales growth (excluding weather impact) ................................. 45
NSP-Wisconsin rate case .......................................... 41
MERP rider .................................................. 38
Conservation and non-fuel riders (partially offset in O&M expense) ............... 24
Quality of service obligations ........................................ 12
SPS Texas surcharge decision ........................................ (8)
SPS FERC 206 rate refund accrual .................................... (8)
Other ...................................................... 15
Total increase in base electric utility revenues ............................ $349
2006 Comparison with 2005 — Base electric utility revenues increased due to rate increases in Minnesota and
Wisconsin, higher fuel and purchased power costs, largely recoverable from customers, weather-normalized retail sales
growth of approximately 1.8 percent, and the implementation of the MERP rider to recover financing and other costs
related the MERP construction projects.
Base Electric Utility Margin
2007 vs. 2006
(Millions of Dollars)
PSCo electric retail rate increase .......................................... $112
Retail sales growth (excluding weather impact) ................................. 49
MERP rider ...................................................... 29
Miscellaneous revenues (partially offset in O&M) ............................... 18
Estimated impact of weather ............................................ 16
Transmission revenues / net of expense ...................................... 15
Conservation and non-fuel riders (partially offset in O&M) ......................... 13
Firm wholesale ..................................................... 11
SPS regulatory settlements, including fuel cost recovery ............................ 1
Purchased capacity costs ............................................... (27)
NSP-Wisconsin fuel cost recovery ......................................... (14)
Other, including sales mix and other fuel recovery ............................... (4)
Total increase in base electric utility margin ................................. $219
49