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CWLP's generating capacity is provided by
four coal-fired steam turbine
generators—including the recently completed Dallman 4
Power Station—(totaling 548 megawatts [MW]), one dual-fuel natural gas- and oil-fired
combustion turbine (118 MW), two oil-fired combustion turbines (totaling
31 MW), and three oil-fired diesel generating units (totaling 5 MW). CWLP's total summer maximum net generating capability is
702 MW. The start-up of the 208-MW Dallman 4 in Summer 2009 allowed CWLP to stop using the last two operating, 1960s-vintage generating units at Lakeside Power Station, which was originally built in 1935 on the shore of the then newly constructed Lake Springfield. In addition to the power self-generated by CWLP, the utility contracts for wind power from FPL Energy. In 2008, the utility generated 1,752,093 megawatt-hours (MWH) of electricity and had system purchases of 410,628 MWH, for a total system input of 2,162,721 MWH. This served the native energy requirement of 1,886,986 MWH, as well as system wholesale sales of 275,736 MWH. Of the 410,628 MWH purchased in 2008, 80,026 MWH was in the form of
wind energy purchased from the Hancock County and Crystal Lake wind farms in Iowa. The average wind
capacity factor was 31.77%. CWLP paid $3,448,319 ($43.09/MWH) for the wind
energy and sold it for $2,868,334 ($35.84/MWH), for a net cost to the
utility of $579,985 ($7.25/MWH). Wind energy equalled 4.57% of net
generation and 4.24% of native energy. In 2008, CWLP's summer peak demand was 420 MW, set on Monday, August 4 at 5 p.m., when the outdoor temperature was 92° F and the heat index was 106° F. This represents a 6.9% reduction from the record peak of 451 MW set in 2006. During Winter 2008/2009, CWLP set two record peak demands. The
first—323 MWH—occurred on Sunday, December 21, 2008, at 7 p.m., when the
temperature was 2 degrees and the wind speed was 21 mph wind with gusts
up to 31 mph. That record was broken on January 15, 2009, at 7 p.m.,
when demand reached 325 MW. The temperature was -1 degrees and the wind
speed was 7 mph. Prior to this winter, the record winter peak was 311
MW, set on Tuesday, January 18, 1994, when the temperature was -10
degrees and the wind chill was -15 degrees.
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