Xcel Energy 2008 Annual Report Download - page 66

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weather-normalized retail sales growth of approximately 1.7 percent. Unfavorable weather partially offset the positive
variances.
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 ......................................... 26
Miscellaneous revenues (partially offset in operating & maintenance expense) .............. 17
Estimated impact of weather ............................................ 16
Trading margin .................................................... 16
Firm wholesale ..................................................... 15
Fuel and purchased power cost recovery ..................................... (66)
Other .......................................................... (6)
Total increase in electric revenues ........................................ $240
2007 Comparison with 2006 — Electric 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.
Electric Margin
2008 vs. 2007
(Millions of Dollars)
Retail rate increases (Wisconsin, North Dakota, Texas interim and New Mexico) ............ $ 48
Retail sales growth (excluding weather impact) ................................. 30
Conservation and non-fuel riders ......................................... 28
MERP rider ...................................................... 23
Increased margin due to leap year (weather normalized impact) ....................... 9
Estimated impact of weather ............................................ (49)
Purchased capacity costs ............................................... (30)
Revenue subject to refund due to change in nuclear refueling outage recovery method ........ (18)
Trading margin .................................................... (10)
Retail customer sales mix .............................................. (8)
Other, including fuel recovery ........................................... 1
Total increase in electric margin ......................................... $ 24
2008 Comparison to 2007 — The increase in electric margin for the year was due to electric rate increases at
Wisconsin, North Dakota, Texas and New Mexico, higher conservation and non-fuel rider revenues and
weather-normalized retail sales growth. These items were partially offset by unfavorable weather and higher purchased
power costs.
56