Power Outages in Corson County, SD
Montana-Dakota Utilities Co has not reported outages here, but it only publishesactive outages, so that isn't a confirmed all-clear. Grand Electric Coop, Inc and Moreau-Grand Electric Coop Inc publish only a system-wide total, not county figures. There is no live feed for City of McLaughlin - (SD). In 2025, the average customer here lost power for about 2.3 hours.
Corson County, SD is served by 4 tracked utilities.
Cite this data
- URL
- https://massoutage.com/south-dakota/corson-county
- As of
- Not available
- Publisher
- MassOutage
MassOutage, "Power Outages in Corson County, SD". https://massoutage.com/south-dakota/corson-county
Montana-Dakota Utilities Co only appearsin feeds while reporting outages, so no report isn't a confirmed all-clear.
Grand Electric Coop, Inc and Moreau-Grand Electric Coop Inc publish no county-level figures.
No live feed for City of McLaughlin - (SD): outages in itsservice area won't show here.
0.0%of this county's ~3,518 customers are served by utilities with a county-level live feed.
We can't see outages for: City of McLaughlin - (SD). Their customers are not in any number on this page; check their own outage maps.
Only visible while reporting outages: Montana-Dakota Utilities Co. Zero here is not a confirmed all-clear.
System-wide total only, no county split: Grand Electric Coop, Inc, Moreau-Grand Electric Coop Inc.
| Utility | Feed | Out | Served | % out | Small outages | Incidents | Utility ETR | As of |
|---|---|---|---|---|---|---|---|---|
| Grand Electric Coop, Inc | Live · total only | not by county | - | - | - | - | - | - |
| Montana-Dakota Utilities Co | Outages only | none reported | - | - | - | - | - | - |
| Moreau-Grand Electric Coop Inc | Live · total only | not by county | - | - | - | - | - | - |
| City of McLaughlin - (SD) | No live feed | can't see | - | - | - | - | - | - |
Electricity-dependent residents
HHS emPOWER · data October 7, 2026Medicare beneficiaries in Corson Countywho rely on electricity-dependent medical equipment (ventilators, oxygen concentrators, home dialysis, powered wheelchairs, and more). HHS reports counts of 1–10 as “≤11”. Medicare only, so the full at-risk population is larger.
By ZIP code (6)
| ZIP | Power-dependent | Ventilators | O2 concentrators | Home dialysis |
|---|---|---|---|---|
| 57642 | 14 | 0 | ≤11 | ≤11 |
| 57660 | ≤11 | 0 | ≤11 | 0 |
| 57658 | ≤11 | 0 | ≤11 | 0 |
| 57645 | ≤11 | 0 | ≤11 | 0 |
| 57641 | ≤11 | 0 | ≤11 | 0 |
| 57621 | ≤11 | 0 | ≤11 | 0 |
Emergency managers can request identified beneficiary lists through their state health department via the HHS emPOWER program.
Outage began, grew, restoration estimate changed, restored: by email, Slack, Teams, Discord or signed webhook, for Corson County or any town and utility in it.
No active NWS alerts for Corson County right now.
Corson County has been under 31 National Weather Service alerts recently, most recently a Wind Advisory on October 16, 2026.
- Wind Advisory ×7
- Dense Fog Advisory ×7
- Special Weather Statement ×6
- Severe Thunderstorm Warning ×4
- Freeze Warning ×3
- Flood Watch ×2
Hardest-hit cities in Corson County
Where this event is concentrated across the county's towns and townships.
Historical reliability
In 2025, the average customer in Corson County went about 2.3 hours without power. Peak simultaneous outage on record reached 281 customers.
The US EIA reports South Dakota utilities averaged 4.7 hrs without power per customer (SAIDI) in 2025, a cross-check on our county estimate of 2.3 hrs.
Worst year here was 2024 (peak 281 customers out) · decade average 0.8 hrs without power per customer/yr.
| Year | Outage events | Peak customers out | Avg hrs/customer |
|---|---|---|---|
| 2017 | 7 | 143 | 0.1 |
| 2018 | 4 | 142 | 0.3 |
| 2019 | 2 | 46 | 0.0 |
| 2020 | 8 | 139 | 0.5 |
| 2021 | 9 | 140 | 0.2 |
| 2022 | 7 | 141 | 0.8 |
| 2023 | 4 | 59 | 0.0 |
| 2024 | 81 | 281 | 2.8 |
| 2025 | 117 | 201 | 2.3 |
Cost of power in Corson County
ENERGY & AI DEMAND →Estimated residential electricity price for Corson County, customer-weighted across the utilities serving it (US EIA, 2025). Retail prices aren't published at the county level; this is a derived estimate.
- Montana-Dakota Utilities Co13.0¢6,348 cust
Weighted by each utility's residential customer count (utilities report customers at the state level; a per-county share isn't published). Rising retail prices track a national demand surge; see energy & the data-center boom.
Relatively Moderate winter weather exposure · 0.8 hrs/yr of outages over the last decade.
FEMA rates this county’s social vulnerability very high: outages hit harder where communities are less able to respond and recover.
All hazard rankings →Power outages in Corson County: FAQ
- How often does Corson County, SD lose power?
- Based on EAGLE-I records, Corson County, SD logged 117 distinct outage events in 2025, averaging about 2.3 hours without power per customer over the year.
- What was the worst power outage in Corson County, SD?
- The largest tracked outage peaked at 281 customers without power, beginning November 27, 2024 and lasting about 2h 30m.
- Is there a power outage in Corson County, SD right now?
- No major outage is currently reported for Corson County, SD. Live coverage depends on whether local utilities report to ODIN.
- Which utilities serve Corson County, SD?
- Tracked electric providers include Moreau-Grand Electric Coop Inc.
Outages are tracked at the county level; these ZIP codes fall within Corson County.
57621, 57633, 57634, 57639, 57641, 57642, 57645, 57657, 57658, 57659, 57660
Electric providers serving this county
From EIA-861 service territory, with official reliability where reported.
| Provider | Official SAIDI (EIA) | Live | Report outage |
|---|---|---|---|
| Montana-Dakota Utilities Co | 2.4 hrs | Outages only | - |
| Grand Electric Coop, Inc | - | Live · total only | - |
| Moreau-Grand Electric Coop Inc | - | Live · total only | - |
| City of McLaughlin - (SD) | - | No live feed | - |
Data from DOE/ORNL ODIN, DOE EAGLE-I, EIA Form 861 (utility reliability), EIA electricity retail prices and FEMA National Risk Index, every source we read. Historical figures derive from the DOE/ORNL EAGLE-I dataset (EAGLE-I tracked roughly 0% of South Dakota customers). Machine-readable data: /api/v1/counties/46031 and /api/v1/counties/46031/history.