NEW YORK, April 15 (Reuters)
Arizona Power Public Service Co. said on Thursday it shut the 750-megawatt Four Corners 4 coal-fired power unit in New Mexico to fix a tube leak.
In addition to the coal-fired unit 4, the station's 220 MW unit 3 has been
shut for spring maintenance since early April.
Electricity traders said coal units usually remain shut for about a month for
spring maintenance to prepare for the busy summer air conditioning season.
There are five units at the Four Corners station, including the 170 MW units
1 and 2, the 220 MW unit 3 and two 740 MW units 4 and 5.
APS, a subsidiary of Pinnacle West Capital Corp. Units 4 and 5 are owned by Edison International's
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