Cooperative · South Dakota · EIA 19293

Southeastern Electric Coop Inc - (SD)

Cooperative · South Dakota · 22K customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 54 minutes/customer.

Reliability detail ↓ South Dakota utilities

Reliability verdict

Southeastern Electric Coop Inc - (SD) shows above-average chronic reliability in 2023: 54 minutes SAIDI excluding major events across 22K customers.

54 min
SAIDI 2023
54 min
SAIDI ex-MED
22K
Customers

Chronic reliability judged on SAIDI excluding major event days when reported (IEEE 1366). Source: EIA Form 861 · August 2026.

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Signature read: short interruption minutes vs the 911 utility cohort (≤96 min tercile cut).

What short-outage Southeastern Electric Coop Inc - (SD) filings show

Southeastern Electric Coop Inc - (SD) is a member-owned electric cooperative operating in South Dakota under EIA identifier 19293. It reports service to approximately 22,283 customer accounts and generated about $0.08 billion in annual electric revenue, with a service footprint spanning 46 ZIP codes. Being member-owned, this cooperative answers to its ratepayers rather than outside shareholders, a structure that tends to influence how rate cases and capital spending get decided.

In 2023, the average Southeastern Electric Coop Inc - (SD) customer experienced 53.8 minutes of power interruptions, a measure known as SAIDI, or System Average Interruption Duration Index. That is comfortably under the 120–180 minute national benchmark range, a sign of solid grid resilience and quick outage response. Excluding major event days (hurricanes, ice storms), SAIDI drops to 53.8 minutes, the gap between that figure and the headline 53.8 reveals how much weather, not day-to-day infrastructure, drove outages.

With 4 consecutive years of EIA data (2020–2023), Southeastern Electric Coop Inc - (SD)'s reliability record can be judged on trend rather than one isolated year. SAIDI has improved from 113.2 to 53.8 minutes over that window, a meaningful direction for prospective customers and regulators watching capital investment outcomes.

B+
Reliability Score
76/100
Southeastern Electric Coop Inc - (SD) · 2 of 3 dimensions reported

Based on this utility's own EIA Form 861 reliability record -- baseline (major-event- excluded) outage duration, total outage duration, and outage frequency -- each benchmarked against every reporting utility nationwide. Not a measure of electricity rates or customer service, which this portal does not track.

Baseline Reliability B 53.8 min/yr
SAIDI excluding major-event days — day-to-day grid performance
Total Outage Duration A- 53.8 min/yr
SAIDI including storms and major events — the full-year experience
Outage Frequency N/A N/A
SAIFI not reported for this utility
SAIDI vs. national mean (341 min) 7.2%

54 min/year per customer

Southeastern Electric Coop Inc - (SD) SAIDI

Minutes without power per year (2023)

54 SAIDI54 SAIDINat. avg 341341SAIDI54SAIDI

Excellent

SAIDI by year (2020-2023)

Minutes per customer-year · EIA Form 861

Year-by-year SAIDI for Southeastern Electric Coop Inc - (SD) from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.

Source: U.S. EIA Form 861 As of August 2026

Southeastern Electric Coop Inc - (SD) SAIDI trend

0 20 40 60 80 100 120 140 2020 2021 2022 2023 113.2 115.6 123.3 53.8
Year-by-year SAIDI from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.

Southeastern Electric Coop Inc - (SD) vs the nationwide SAIDI distribution

Where this utility's headline SAIDI sits among every EIA Form 861 utility with a reported figure

54 Among the lowest fewer outage minutes than 81% of 911 utilities

Utilities nationwide, banded by latest reported SAIDI (minutes)

Each bar is a band; taller bars hold more utilities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source U.S. EIA Form 861 reliability filings · August 2026

Price vs. reliability

Where Southeastern Electric Coop Inc - (SD) sits on price vs. reliability

Among the 781 U.S. utilities large enough to report both revenue per customer and a recent outage record, Southeastern Electric Coop Inc - (SD) charges more per customer than 85% of them, and is more reliable (lower SAIDI) than 84% of them, placing it in the quadrant where it pays more and is more reliable. Revenue per customer and outage minutes are independent figures: paying more does not guarantee fewer outages.

Southeastern Electric Coop Inc - (SD) vs. a 40-utility national peer sample, price percentile vs. reliability percentile. Scatter plot of 41 data points (bubble-sized by third dimension). 050100150 050100150 Best valuePays for itCheap + riskyWorst deal Price percentile Reliability percentile Point, Price percentile: 0 · Reliability percentile: 37Point, Price percentile: 3 · Reliability percentile: 45Point, Price percentile: 5 · Reliability percentile: 40Point, Price percentile: 8 · Reliability percentile: 87Point, Price percentile: 10 · Reliability percentile: 52Point, Price percentile: 13 · Reliability percentile: 95Point, Price percentile: 15 · Reliability percentile: 22Point, Price percentile: 18 · Reliability percentile: 32Point, Price percentile: 20 · Reliability percentile: 27Point, Price percentile: 23 · Reliability percentile: 82Point, Price percentile: 25 · Reliability percentile: 12Point, Price percentile: 28 · Reliability percentile: 55Point, Price percentile: 30 · Reliability percentile: 67Point, Price percentile: 33 · Reliability percentile: 65Point, Price percentile: 35 · Reliability percentile: 7Point, Price percentile: 38 · Reliability percentile: 0Point, Price percentile: 40 · Reliability percentile: 80Point, Price percentile: 43 · Reliability percentile: 2Point, Price percentile: 45 · Reliability percentile: 30Point, Price percentile: 48 · Reliability percentile: 25Point, Price percentile: 50 · Reliability percentile: 47Point, Price percentile: 53 · Reliability percentile: 43Point, Price percentile: 55 · Reliability percentile: 97Point, Price percentile: 57 · Reliability percentile: 100Point, Price percentile: 60 · Reliability percentile: 5Point, Price percentile: 63 · Reliability percentile: 62Point, Price percentile: 65 · Reliability percentile: 50Point, Price percentile: 68 · Reliability percentile: 10Point, Price percentile: 70 · Reliability percentile: 17Point, Price percentile: 73 · Reliability percentile: 35Point, Price percentile: 75 · Reliability percentile: 85Point, Price percentile: 78 · Reliability percentile: 20Point, Price percentile: 80 · Reliability percentile: 70Point, Price percentile: 83 · Reliability percentile: 77Point, Price percentile: 85 · Reliability percentile: 15Point, Price percentile: 88 · Reliability percentile: 57Point, Price percentile: 93 · Reliability percentile: 72Point, Price percentile: 95 · Reliability percentile: 92Point, Price percentile: 98 · Reliability percentile: 75Point, Price percentile: 100 · Reliability percentile: 60Southeastern Electric Coop Inc - (SD), Price percentile: 85 · Reliability percentile: 84
Southeastern Electric Coop Inc - (SD) vs. a 40-utility national peer sample, price percentile vs. reliability percentile.

Revenue per customer: $3,377/year · Latest SAIDI: 53.8 minutes/year.

SAIDI 2023 breakdown: 53.8 minutes

Reliability Trend (2020–2023)

Year SAIDI (min) SAIDI nMED SAIFI
2020 113.2 101.0 -
2021 115.6 74.5 -
2022 123.3 78.9 -
2023 53.8 53.8 -

SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.

Service Area

Southeastern Electric Coop Inc - (SD) serves 46 ZIP codes in South Dakota.

57001570045701257013570145701557018570215702757029570325703357034570355703657037570395704057042570435704557047570485705257053570585705957064570705707357076570775710357106571085711057311573195732157330573315733257334573665737457376

Frequently Asked Questions

How reliable is Southeastern Electric Coop Inc - (SD)?

Southeastern Electric Coop Inc - (SD) had a SAIDI of 53.8 minutes in 2023. Excluding major weather events, this is below the national average, indicating above-average reliability.

What type of utility is Southeastern Electric Coop Inc - (SD)?

Southeastern Electric Coop Inc - (SD) is classified as a Cooperative serving South Dakota.

How many customers does Southeastern Electric Coop Inc - (SD) serve?

Southeastern Electric Coop Inc - (SD) serves approximately 22,283 customers in South Dakota.

How has Southeastern Electric Coop Inc - (SD)'s reliability changed over time?

Southeastern Electric Coop Inc - (SD) has 4 years of reliability data (2020-2023). This utility's SAIDI has stayed fairly flat over the period. Review the trend table above for year-by-year detail.

Utility Profile

Type
Cooperative
State
South Dakota
Customers
22,283
Annual Revenue
$0.08B
EIA ID
19293

Explore

Utilities with similar EIA profiles

Two cross-state peer sets for Southeastern Electric Coop Inc - (SD). Same-state SAIDI neighbors stay in Read-with below; these neighborhoods are nearest other-state utilities with at least 10,000 reported customers.

Similar customer count

Nearest utilities by Form 861 customers (22K here), outside South Dakota.

Gulf Coast Electric Coop, Inc 22K · FL Capital Electric Coop, Inc 22K · ND Mountain Parks Electric, Inc 22K · CO Beltrami Electric Coop, Inc 22K · MN

Similar chronic SAIDI

Nearest utilities by latest SAIDI minutes (53.8 here), outside South Dakota, excluding the customer-peer set.

City of Rock Hill - (SC) 53.3 min · SC Dakota Electric Association 53.2 min · MN Town of Mansfield - (MA) 52.9 min · MA South River Elec Member Corp 52.9 min · NC

Source: U.S. Energy Information Administration Form 861 annual electric power industry survey · ZIP service territory: OpenEI. Disclaimer: informational only, not professional advice. See full disclaimer · methodology.