[antiRepublicrat]

The question Edison had to ask itself is whether making a $1.1 billion investment was going to make a satisfactory rate of return.

The plant's already been running for 34 years, so can't have too much of a life left in it. That $1.1 billion (for a plant that cost $214 million to build, still less than a billion in today's dollars) won't be spread out over too-long a time, maybe only 10 or 20 years.

[BipolarBob]

The plant's already been running for 34 years, so can't have too much of a life left in it.

What is your estimate of lifespan of a 1500 mw powerplant? Bear in mind boilers can be re-tubed, turbines rebuilt and auxillary equipment replaced. Longevity estimates are sometimes made for bond issues, regulators or other single issue bodies. These estimates may have no real basis.