July 16 Oregon power company Portland General
Electric Co said it expected to spend up to $12 million
to replace the power lost from the shutdown of two coal-fired
plants, one in its home state and one in Montana, for unplanned
The 740-megawatt Unit 4 at the Colstrip power plant in
Montana shut on July 1 and is likely to remain down for at least
six months, PGE said in a federal filing.
Workers found damage to the generator in Colstrip 4, which
PGE said would require repairs to the stator, core and rotor,
among other components.
PGE owns a 20 percent share (about 148 MW) in Colstrip 4,
which is operated by PPL Montana LLC, a unit of PPL Corp
PGE also said the 585-MW Boardman plant in Oregon shut on
July 1 and should remain down for at least a month.
Boardman tripped offline when a thermal water hammer damaged
the cold reheat piping line that runs between the turbine and
the boiler, PGE said.
PGE operates Boardman and has a 65 percent ownership
interest (about 374 MW) in the plant.
Because of these unplanned outages, PGE said it would incur
incremental costs to replace its share of the output of the
Although the operators have not determined the actual time
needed to fix the plants, PGE said it estimates its replacement
power costs at $10 million to $12 million.
PGE also said the plant operators were filing insurance
claims for the repair work, with each facility having a $2.5
million deductible for each event.
Shares of PGE were down 1.2 percent at $31.99 in morning