SAIDI
112 min per year
Mean outage duration per year (2023)
What This Utility Data Tells You
Montana-Dakota Utilities Co is an investor-owned utility operating in Montana under EIA identifier 12199. It reports service to approximately 93,947 customer accounts and generated about $0.23 billion in annual electric revenue, with a service footprint spanning 179 ZIP codes. Investor ownership puts this utility under the regulatory authority of the state public utility commission, which reviews its rate requests and reliability record.
In 2023, the average Montana-Dakota Utilities Co customer experienced 112.4 minutes of power interruptions, the industry-standard SAIDI metric (System Average Interruption Duration Index). That sits within the 120–180 minute national benchmark range, indicating performance typical of U.S. distribution utilities. Over the same period, SAIFI (outage events per customer) was 1.29, putting the typical customer at roughly 1 distinct interruption that year.
With 4 consecutive years of EIA data (2020–2023), Montana-Dakota Utilities Co's reliability record can be judged on trend rather than one isolated year. Over that window, SAIDI moved from 137.2 down to 112.4 minutes, a trend worth noting for anyone weighing capital investment outcomes.
SAIFI
1.29 interruptions/yr
Outage frequency (2023)
Customers
93,947
Served in Montana
SAIDI vs. National Average (180 min) 28.1%
112 minutes per customer per year
Power-out minutes per year (2023)
Reliability Trend (2020–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 137.2 | - | 1.684 | - |
| 2021 | 685.1 | - | 3.100 | - |
| 2022 | 120.7 | - | 1.204 | - |
| 2023 | 112.4 | - | 1.287 | - |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Service Area
Montana-Dakota Utilities Co serves 179 ZIP codes in Montana.
5740157428574375744157442574485745057451574525745557456574665747157472574735747557481576015763157632576405764557646576485765857724584135842858433584365843958440584415845658460584825848758495585015850258503585045850558506585075852058521585235852458529585305853258533585415854258544585455854958552585545855858560585615856258563585685857258573585805858158601586025862158622586235862558626586305863158632586365863858639586405864358646586475864958650586515865258653586545865558656587185872158725587275873058734587375874658752587555876158765587695877258773587765878258784587875879458795588015880258830588315883358835588385884358844588455884958852588545885659201592125921359215592175921859219592215922559226592425924359247592485925459255592585925959262592705927459301593125931359315593245932659327593305933359336593385933959341593445934559347593495935359354828018283282833828348283682838828398284282844
Frequently Asked Questions
How reliable is Montana-Dakota Utilities Co?
Montana-Dakota Utilities Co had a SAIDI of 112.4 minutes in 2023. Leaving aside major weather events, that figure sits close to the national average.
What type of utility is Montana-Dakota Utilities Co?
Montana-Dakota Utilities Co is classified as a IOU serving Montana.
How many customers does Montana-Dakota Utilities Co serve?
Montana-Dakota Utilities Co serves approximately 93,947 customers in Montana.
How has Montana-Dakota Utilities Co's reliability changed over time?
Montana-Dakota Utilities Co 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.
Utility Profile
- Type
- IOU
- State
- Montana
- Customers
- 93,947
- Annual Revenue
- $0.23B
- EIA ID
- 12199
Explore
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.
Every figure on PlainUtility is rendered directly from the U.S. Energy Information Administration's Form 861 reliability data, no number is typed in by an editor. This utility's SAIDI/SAIFI figures are rendered directly from EIA Form 861 reliability files. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2020-2023.