transaction costs that would be involved. Furthermore, an approach wherein each customer
must either provide their own insurance or mitigate the costs of service interruption necessarily
burdens those customers who, through no fault of their own, have the worst service reliability
and they generally do not have control over their service reliability. Thus, separating the
financing of insurance or mitigation of harm from the financing of utility service just adds insult to
injury for those who experience poor reliability. We think that reasonable provisions for bill
credits that offset a significant portion of the harms and/or mitigation costs of electricity service
interruptions would be welfare-improving.
Providing bill credits for customer service interruptions does not increase electricity bills. To the
extent that bill credits are not recoverable by the electric utility, bill credits will constitute a bill
reduction and a utility incentive to cost-effectively reduce service interruption; we further discuss
these aspects of bill credits below. To the extent that bill credits for customer service
interruptions are recoverable by the electric utility by, for example, being included in distribution
rates per kWh, that revenue is also paid out to customers in the form of bill credits. The net
effect of rate-recoverable bill credits on customer bills is zero, but those customers who
experience reliable service pay more and those customers who experience service interruptions
pay less than they would in the absence of bill credits. Bill credits that are not rate-recoverable
provide a bill reduction to customers who experience service interruptions.
If service interruptions are essentially random, then rate-recoverable bill credits serve simply as
insurance. If service interruptions are not really random but instead reflect geographic variation
in utility infrastructure and performance, then both non-recoverable and rate-recoverable bill
credits provide more equitable electric service and bills. The commission has limited formal
evidence regarding inequities in electric service but substantial reasons to assume that there is
significant inequity amongst customers. Underground distribution and service lines are well
known to provide more reliable service than overhead distribution and service lines and portions
of each utility service territory are overhead and other portions are underground but with
customers in the same class paying the same ongoing rates for distribution without regard to
whether they are served by underground or overhead facilities.8 The Commission has long
required utilities to report “worst circuits,” a concept that has meaning only if reliability is not
uniform and is therefore in some sense inequitable. Recent utility reports filed in docket U-21122
provide maps showing significant geographical inequities in distribution system reliability.
There is also good reason to believe that inequities in electric service reliability are correlated
with income. Newer suburbs were developed after underground facilities became the norm and
low-income communities are typically located in the older portions of towns and metropolitan
areas. Distribution systems are upgraded when required by load growth so that growth areas
tend to have new and improved distribution facilities that are likely more reliable but low-income
communities are typically located in areas where load is not growing.
8 We acknowledge that the costs of initial construction of underground facilities as compared to overhead
facilities are largely addressed through payments at service installation, but this practice falls far short of
providing for accurate cost allocation and does not address the differences in reliability experience.
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