SAIDI
69 min per year
Average outage minutes (2023)
Tullahoma Board-Public Utils is a municipally-owned utility operating in Tennessee under EIA identifier 19266. It reports service to approximately 11,180 customer accounts and generated about $0.03 billion in annual electric revenue, with a service footprint spanning 1 ZIP code. As a municipal utility, it is typically governed by a local board or city council and is exempt from federal income tax.
In 2023, the average Tullahoma Board-Public Utils customer experienced 68.8 minutes of power interruptions — a metric called SAIDI (System Average Interruption Duration Index). That places this utility well below the 120–180 minute national benchmark, signaling strong grid hardening and fast restoration practices. SAIFI — the average number of outage events per customer — was 2.76 for the same period, so customers statistically faced roughly 3 distinct interruptions that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 26.5 minutes — the gap between that figure and the headline 68.8 reveals how much weather, not day-to-day infrastructure, drove outages.
The EIA dataset includes 4 years of continuous reporting (2020–2023) for Tullahoma Board-Public Utils, which lets you see whether reliability is trending up or down rather than judging from a single snapshot. SAIDI has improved from 73.8 to 68.8 minutes over that window — a meaningful direction for prospective customers and regulators watching capital investment outcomes. All figures on this page come directly from EIA Form 861, the federal annual electric power industry survey, with service territory ZIPs sourced from OpenEI — you can cross-reference them with your own utility bill or use them when comparing providers before relocating.
SAIDI
69 min per year
Average outage minutes (2023)
SAIFI
2.76 interruptions/yr
Outage frequency (2023)
Customers
11,180
Served in Tennessee
69 minutes per customer per year
Minutes without power per year (2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 73.8 | 29.1 | 1.233 | 11,215 |
| 2021 | 361.4 | 27.4 | 3.559 | 11,059 |
| 2022 | 40.9 | 40.9 | 2.279 | 11,215 |
| 2023 | 68.8 | 26.5 | 2.763 | 11,215 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Tullahoma Board-Public Utils serves 1 ZIP code in Tennessee.
Tullahoma Board-Public Utils had a SAIDI of 68.8 minutes in 2023, meaning the average customer experienced about 69 minutes of outages that year. This is below the national average, indicating above-average reliability.
Tullahoma Board-Public Utils is classified as a Municipal serving Tennessee. Municipal utilities are owned and operated by local governments.
SAIDI (System Average Interruption Duration Index) measures the average total minutes per year that a customer of Tullahoma Board-Public Utils experiences power outages. A lower SAIDI indicates better reliability. The national average is roughly 120-180 minutes per year, so comparing Tullahoma Board-Public Utils's SAIDI to that benchmark shows whether this utility is above or below average.
Tullahoma Board-Public Utils serves approximately 11,180 customers in Tennessee. Customer count can affect reliability metrics because larger utilities may face different infrastructure challenges compared to smaller ones.
Tullahoma Board-Public Utils has 4 years of reliability data (2020-2023). SAIDI has remained relatively stable over this period. Review the trend table above for year-by-year detail.
SAIDI "without major event days" (SAIDI nMED) excludes outages caused by hurricanes, ice storms, and other catastrophic weather events. It better reflects day-to-day infrastructure reliability rather than vulnerability to extreme weather. Both standard SAIDI and SAIDI nMED are shown in the reliability trend table above.
Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the U.S. Energy Information Administration (EIA) Form 861. Consult a qualified professional before making decisions based on this data.
Read our methodology — how this data is sourced, computed, and verified.