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Electric System Average Interruption Duration Index (SAIDI) in Minutes

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Analysis of Performance

Fort Collins Light & Power reliability in one sentence: On average, a customer in Fort Collins can expect an 11.57-minute outage every year.

SAIDI is how long, on average, each customer was without power in the last year.

The Q1-25 SAIDI value increased slightly to 11.57 minutes from 11.09 minutes compared to the 12-month measurement period for Q4-24.

Taken into context SAIFI, SAIDI, and CAIDI Q1-25 reliability showed a similar frequency of outages (71 outages versus last quarter's 77), and an increase of 1,315 overall customer outage hours (15,483 hours versus last quarter’s 14,168 hours) for the 12-month, measurement period for Q1. But, for those customers who experienced an outage, the average outage time decreased from 46.61 minutes to 44.44 minutes.

The slight increase in customer hours for outages is viewed as very minor from the previous quarter, with 21 primary cable failures, 2 - 200-amp Multi-Position Junction, 13 - Single Phase transformers, 3 - 200-amp elbow failures, 11 transformer, and 1 standoff junction, with the remaining outage hours all being associated with secondary service connections and cable.

 



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Metric Definition
The electric distribution System Average Interruption Duration Index (SAIDI) is a description of the length of time all customers would have been out of power if the total number of hours out of service over the last 12 months were to be shared, and it is typically measured in minutes. The number of outages as well as the time between the start of an outage and the restoration of electric service have a bearing on this number.
Why Is This Important?
SAIDI provides our customers with a sense of how well Fort Collins Utilities responds to outages.  Because SAIDI is an industry standard measure, it allows current and perspective customers to compare our quality of service to other communities.
City Organization Impact on Performance
High – Reliable electric service depends on quality installation and maintenance of utility infrastructure to avoid service interruptions and sufficient resources to respond quickly to outages as they occur.  Fort Collins Light and Power is directly responsible for both of these tasks.
Benchmark Information
This metric contains regional and national benchmark data that compares the City's performance to other public utilities. The regional benchmark accounts for local factors that impact performance on this metric; the national benchmark compares Fort Collins' performance to national "best practices."