Utility / owner / operatorMTOwner type not reportedHow EIA classifies an organization, such as a public utility, cooperative or investor-owned company.Definition ↗
Missoula Electric Coop, Inc
About this record
Operates 0 plants; owns no reported shares; sells retail electricity.
Retail seller
2024 inventory
Operated nameplate capacity, operating generatorsFull nameplate MW of operating generators at plants this organization runs, including shares held by other owners.Definition ↗
Not reported
Source & method
Sum of operating generator nameplate MW at plants where this organization is the reported operator
2024 inventory · reported · derived · missing · final
0 of 0 plants included.
Reported operating capacity; partial plant/unit coverage is marked
Owned nameplate capacity, operating generatorsOperating generator nameplate MW multiplied by this organization’s ownership share, once per generator. This can include plants another organization operates.Definition ↗
Not applicable
Source & method
Sum over operating generators of nameplate MW x this organization's ownership fraction (reported schedule or EIA-860 schedule-4 default)
2024 inventory · reported · derived · not_applicable · final
Disclosed supply · Washington fuel mixA supplier’s reported sources of electricity sold to Washington customers, grouped by fuel.Definition ↗
Not a Washington retail supplier in the Fuel Mix Disclosure extracts (CY2014–CY2024 loaded), or not linked by the reviewed claimant crosswalk
Carbon allowances · no-cost allocationAn emissions allowance Washington assigns to an eligible utility without charge. It is not measured emissions.Definition ↗
Not a CETA-obligated electric utility in Ecology's allowance schedule (or not linked by the reviewed crosswalk); only Washington retail utilities subject to the Clean Energy Transformation Act receive no-cost allowances. Checked wa-ecology-cca-allowances 2026-09-18
Money · FERC Form 1The annual financial report large investor-owned utilities file with the federal energy regulator.Definition ↗
FERC Form 1: not a respondent (public power, cooperative, federal or non-utility); checked PUDL v2026.9.0 respondent list 2026-09-18
Retail electricity sold
Full serviceA utility that sells electricity to customers. Full-service sales include both electricity and delivery.Definition ↗
Average revenue per kWhRevenue divided by electricity sold. This average is not a tariff or a household bill.Definition ↗ is realized revenue ÷ sales, not a tariff.
ID · commercial
Retail sales
878MWh
2024
Source & method
EIA-861 electricity sold to ultimate customers for the stated utility, state, customer class and service type; calendar year
2024 calendar year · reported · direct · valid · final
Sold to retail customers in the stated state (utility x state grain); bundled full-service rows only in the summaries; energy-only and delivery-only rows are listed but never added to bundled sales. Realized average revenue per kWh is not a tariff.
Power interruptions reported
2024 · as filed on EIA-861
SAIDISystem Average Interruption Duration Index: the minutes of sustained interruption the average customer had over the year, customer-minutes interrupted divided by customers served. Each utility calculates and reports its own figure on EIA-861 Schedule 3, under the method it declares. A system average says nothing about one address.Definition ↗, SAIFISystem Average Interruption Frequency Index: how many sustained interruptions the average customer had over the year, customers interrupted divided by customers served, as the utility reports it on EIA-861 Schedule 3.Definition ↗ and CAIDICustomer Average Interruption Duration Index: minutes per sustained interruption, SAIDI divided by SAIFI on the same basis. EIA-861 asks utilities for SAIDI and SAIFI only; EIA publishes CAIDI with the data and the atlas shows it as published, never recomputed.Definition ↗ count sustained interruptions. Figures with and without major event daysDays a utility sets apart from normal operation: EIA describes them as events such as snowstorms, floods or heatwaves, or periods of outages that differ greatly from the utility's own five-year history. EIA-861 asks for the indices both with and without them. Part B respondents determine them under IEEE 1366; Part C respondents define a major event themselves. The two series answer different questions and are never blended.Definition ↗ are different measures; compare like with like.
MT · IEEE 1366EIA-861 Schedule 3 has two parts. Part B is for utilities that calculate SAIDI and SAIFI and determine major event days under IEEE 1366-2003 or IEEE 1366-2012; Part C is for any other method, where the utility also states how it defines a momentary interruption and whether inactive accounts count as customers. Figures from the two parts are not comparable and the atlas never pools them; utilities under Part C do not share one method either.Definition ↗
Index
Major event days included
Major event days excluded
Included, loss of supply removed
SAIDIminutes/customer/year
1,606.3
505.9
1,536
SAIFIinterruptions/customer/year
3.59
2.19
3.4
CAIDIminutes/interruption
447.3
230.6
451.8
Customers the indices are based on
17,133 customers
Highest voltage counted as distribution
25 kV
How it was measuredDetermined under IEEE 1366-2003 or IEEE 1366-2012; the form does not record which edition
Outages recorded automatically: yes
Others reporting the same way · major event days included6 utilities in MT under IEEE 1366. Each counts once whatever its size; this is context, not a ranking.
SAIDI median 296.9 (16.5–1,606.3) minutes/customer/yearSAIFI median 1.62 interruptions/customer/year
Others reporting the same way · major event days excluded6 utilities in MT under IEEE 1366. Each counts once whatever its size; this is context, not a ranking.
SAIDI median 147.6 (7.7–505.9) minutes/customer/yearSAIFI median 1.3 interruptions/customer/year
Every year filed
As filed each year. SAIDI in minutes per customer per year; SAIFI in interruptions per customer per year. Blank cells were not reported.
Year
State
Standard
SAIDI with
SAIDI without
SAIFI with
SAIFI without
Customers
2024
MT
IEEE 1366
1,606.3
505.9
3.591
2.194
17,133
2023
MT
IEEE 1366
165.2
165.2
1.186
1.186
16,897
2022
MT
IEEE 1366
257.1
257.1
1.444
1.444
16,510
2021
MT
IEEE 1366
762.4
390
3.21
2.76
16,126
2020
MT
IEEE 1366
362.4
362.4
1.996
1.996
15,771
2019
MT
IEEE 1366
209.8
209.8
1.825
1.825
15,485
2018
MT
IEEE 1366
239.7
170.7
1.49
1.31
16,472
2017
MT
IEEE 1366
706.6
255.2
2.54
1.88
16,276
2016
MT
IEEE 1366
121.4
121.4
1.36
1.36
16,111
2015
MT
IEEE 1366
292.9
292.9
1.38
1.38
15,903
2014
MT
IEEE 1366
178.2
178.2
1.68
1.68
14,750
2013
MT
IEEE 1366
245.8
245.8
1.72
1.72
14,414
Reported by the utility on EIA-861 Schedule 3 under the method it declares. IEEE 1366 and other-method figures are not comparable, and values with and without major event days answer different questions. A system average says nothing about one address. CAIDI is published by EIA as SAIDI divided by SAIFI; it is not a line on the form. A value the utility left blank stays blank. Source and licence· Frozen facts for this utility ↗
Customer programmes
EIA-861 Schedule 6, as filed
Programme results as each utility filed them, by customer class and report year, each in its own unit. Classes are never added into a total, years are never added into a period, and savings are never divided by sales. The one ratio shown, enrolled demand-response customers against the utility's own EIA-861 customer count for the same state, class and year, carries both counts.
Energy efficiency EIA-861 Schedule 6 Part A
Reported by the utility on EIA-861 Schedule 6 Part A as adjusted gross savings at the customer meter under its own evaluation; figures are not comparable across utilities. Reporting-year incremental savings are annualized for participants new that year; life-cycle savings run over the programmes' planned life (energy as a lump sum, peak as the average annual reduction). Each class is shown as filed and the total row is the filer's own; nothing is summed here. Costs are nominal dollars of the report year (the form collects thousands; PUDL publishes dollars). A blank stays blank.
Report year 2024, MT. Each row is one customer class as filed; the filer's total is its own line and is not the sum of the rows above. Costs are nominal dollars.
Class
Incremental annual energy savings, reporting year (annualized)MWh
Customer incentives, incremental life-cycle cost (nominal)USD · life cycle
Other costs, incremental life-cycle (nominal)USD · life cycle
Other costs, reporting-year incremental (nominal)USD
CommercialBPAT
209 MWh
0.1 MW
3,502 MWh
0 MW
11.7 years
$36,026
$111,056
$147,307
$68,317
IndustrialBPAT
18 MWh
0 MW
314 MWh
0 MW
8.7 years
$3,288
$8,488
$19,619
$5,939
ResidentialBPAT
66 MWh
0 MW
6,077 MWh
0 MW
16.1 years
$28,706
$354,097
$420,410
$15,840
TransportationBPAT
0 MWh
0 MW
0 MWh
0 MW
0 years
$0
$0
$0
$0
Filer's totalBPAT
293 MWh
0.1 MW
9,893 MWh
0 MW
not applicable
$68,020
$473,641
$587,336
$90,096
Demand response EIA-861 Schedule 6 Part B
A long-form filer with no Schedule 6 row: either no programme, or a separate administrator reports it.
Population: organizations of this release with EIA-861 rows in the core states. A short-form respondent has no figures to file; a long-form respondent without a row may have no programmes or may have a nonutility administrator reporting for it. Years without a row are listed against the table's span, not against the years this utility filed the form.
Distributed generationCustomer-sited and small generation reported by utilities in aggregate on EIA-861; no locations; a separate population from the plant inventory, never added to it.Definition ↗
Utility reports · no locations
Distributed generation reported by this utility to EIA-861 for 2024, by state
Utility-reported, no locations, not in the EIA-860 plant inventory (>= 1 MW). Storage is listed separately and never added to generation capacity. Non-net-metered units >= 1 MW can also appear in EIA-860; the overlap is disclosed, not resolved. Source rollup rows are excluded from every sum.
Sum of EIA-861 utility-reported nameplate capacity over leaf technology classes, excluding storage and source rollup rows; utility x state grain; no locations; not part of the EIA-860 plant inventory
2024 calendar year · reported · derived · valid · final
1 of 1 reporting utilities included.
net-metered + non-net-metered; the two EIA-861 schedules are disjoint by design
Customer counts can include the same customer under more than one technology. Energy sold to utilities measures exports; it does not measure all generation at customer sites.
Net-metered customers
163count
2024
Source & method
EIA-861 net metering customer count over leaf technology classes; a customer with two technologies can be counted twice by the source
2024 calendar year · reported · derived · valid · final
Catalyst Cooperative, PUDL v2026.9.0, derived from U.S. EIA Forms 860/923
Data transformed by PUDL from U.S. EIA forms; selected fields republished; EIA data is public with dated acknowledgment (https://www.eia.gov/about/copyrights_reuse.php)
Catalyst Cooperative, PUDL v2026.9.0, derived from U.S. EIA Forms 860/923
Data transformed by PUDL from U.S. EIA forms; selected fields republished; EIA data is public with dated acknowledgment (https://www.eia.gov/about/copyrights_reuse.php)
Catalyst Cooperative, PUDL v2026.9.0, derived from U.S. EIA Form 861
Data transformed by PUDL from U.S. EIA forms; selected fields republished; EIA data is public with dated acknowledgment (https://www.eia.gov/about/copyrights_reuse.php)
Catalyst Cooperative, PUDL v2026.9.0, derived from U.S. EIA Form 861
Data transformed by PUDL from U.S. EIA forms; selected fields republished; EIA data is public with dated acknowledgment (https://www.eia.gov/about/copyrights_reuse.php)
Catalyst Cooperative, PUDL v2026.9.0, derived from U.S. EIA Forms 860/923
Data transformed by PUDL from U.S. EIA forms; selected fields republished; EIA data is public with dated acknowledgment (https://www.eia.gov/about/copyrights_reuse.php)