SAIDI
555 min per year
Average outage minutes (2023)
Meriwether Lewis Electric Coop is a member-owned electric cooperative operating in Tennessee under EIA identifier 12330. It reports service to approximately 36,203 customer accounts and generated about $0.11 billion in annual electric revenue, with a service footprint spanning 37 ZIP codes. As a cooperative, its governance is accountable to its ratepayer-members rather than shareholders, which often shapes rate-setting and reinvestment priorities.
In 2023, the average Meriwether Lewis Electric Coop customer experienced 554.9 minutes of power interruptions — a metric called SAIDI (System Average Interruption Duration Index). That is substantially above the 120–180 minute national benchmark, indicating either storm-prone geography, aging infrastructure, or extended restoration windows. SAIFI — the average number of outage events per customer — was 2.21 for the same period, so customers statistically faced roughly 2 distinct interruptions that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 170.2 minutes — the gap between that figure and the headline 554.9 reveals how much weather, not day-to-day infrastructure, drove outages.
The EIA dataset includes 4 years of continuous reporting (2020–2023) for Meriwether Lewis Electric Coop, which lets you see whether reliability is trending up or down rather than judging from a single snapshot. SAIDI has improved from 910.8 to 554.9 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
555 min per year
Average outage minutes (2023)
SAIFI
2.21 interruptions/yr
Outage frequency (2023)
Customers
36,203
Served in Tennessee
555 minutes per customer per year
Minutes without power per year (2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 910.8 | 304.1 | 2.257 | — |
| 2021 | 6.2 | 4.4 | 2.399 | — |
| 2022 | 5.8 | 4.3 | 2.692 | — |
| 2023 | 554.9 | 170.2 | 2.211 | — |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Meriwether Lewis Electric Coop serves 37 ZIP codes in Tennessee.
Meriwether Lewis Electric Coop had a SAIDI of 554.9 minutes in 2023, meaning the average customer experienced about 555 minutes of outages that year. This is above the national average, indicating below-average reliability.
Meriwether Lewis Electric Coop is classified as a Cooperative serving Tennessee. Electric cooperatives are member-owned nonprofit utilities, typically serving rural areas.
SAIDI (System Average Interruption Duration Index) measures the average total minutes per year that a customer of Meriwether Lewis Electric Coop experiences power outages. A lower SAIDI indicates better reliability. The national average is roughly 120-180 minutes per year, so comparing Meriwether Lewis Electric Coop's SAIDI to that benchmark shows whether this utility is above or below average.
Meriwether Lewis Electric Coop serves approximately 36,203 customers in Tennessee. Customer count can affect reliability metrics because larger utilities may face different infrastructure challenges compared to smaller ones.
Meriwether Lewis Electric Coop 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.