Operator overview
NORTHWESTERN CORPORATION
Primary ID 31632
Showing 2024 annual-report filings
Annual report summary
GD, GTG, RGG programs reported
Operating in SD, MT
Total regulated miles
2k
across reported programs
Service connections
52k
latest reported total
LNG facilities (if any)
—
facilities reported
| Program | Miles | Services | State | Year |
|---|---|---|---|---|
| Gas Distribution | 2k | 52k | SD | 2024 |
| Gas Transmission & Gathering | 77 | — | MT | 2024 |
| Regulated Gas Gathering | 554 | — | MT | 2024 |
Miles by installation service by decade.
Gas Distribution
516 mi peak
2k total
Pre-1940
0
1940–1949
0
1950–1959
0
1960–1969
309
1970–1979
158
1980–1989
248
1990–1999
516
2000–2009
250
2010–2019
166
2020–2029
159
Unknown
0
Gas Transmission & Gathering
553 mi peak
2k total
Pre-1940
107
1940–1949
82
1950–1959
553
1960–1969
465
1970–1979
379
1980–1989
234
1990–1999
167
2000–2009
75
2010–2019
36
2020–2029
30
Unknown
4
Regulated Gas Gathering
554 mi peak
554 total
Pre-1940
0
1940–1949
0
1950–1959
0
1960–1969
0
1970–1979
0
1980–1989
0
1990–1999
0
2000–2009
0
2010–2019
0
2020–2029
0
Unknown
554
Reference
| Operator name | NORTHWESTERN CORPORATION |
|---|---|
| Primary ID | 31632 |
| Programs | GD, GTG, RGG |
Contact details
| Preparer name | C*******a R*****l |
|---|---|
| Preparer title | Compliance Data Analyst |
| Preparer phone | (605) 353-7615 |
| Preparer email | c***************l@n**********n.c*m |
| Preparer fax | (000) 000-0000 |
| Preparer address | — |
| Report submission type | INITIAL |
| Report date | 2025-03-13T00:00:00 |
| Filing date | 2025-03-13T00:00:00 |
| Additional information | The decade information is compiled by Accounting information. The Accounting process retires assets based on Accounting rules and principles. Not if the asset is physically retired. The decade information is representation of Accounting not Operating practices |
| Form revision | 7100.1-1 (Rev. 06-2023) |
| Company official name | — |
| Company official title | — |
| Company official phone | — |
| Company official email | — |
| Company official fax | — |
| Emergency contact name | — |
| Emergency contact phone | — |
| Emergency contact email | — |
Section 6 — Flattened data preview
| Key | Value |
|---|---|
| annuals.gd.miles | 1806.399 |
| annuals.gd.report_year | 2024 |
| annuals.gd.services | 52033.0 |
| annuals.gd.source_count | 4 |
| annuals.gd.state | SD |
| annuals.gd.year | 2024 |
| annuals.gtg.miles | 77.291 |
| annuals.gtg.report_year | 2024 |
| annuals.gtg.source_count | 1 |
| annuals.gtg.state | MT |
| annuals.gtg.year | 2024 |
| annuals.raw.gd.COMMODITY | Natural Gas |
| annuals.raw.gd.DATAFILE_AS_OF | 12/1/2025 |
| annuals.raw.gd.OFFICE_ADDRESS_STATE | SD |
| annuals.raw.gd.OPERATOR_ID | 31632.0 |
| annuals.raw.gd.OPERATOR_NAME | NORTHWESTERN CORPORATION |
| annuals.raw.gd.OPERATOR_TYPE | Investor Owned |
| annuals.raw.gd.REPORT_NUMBER | 20251001.0 |
| annuals.raw.gd.REPORT_YEAR | 2024.0 |
| annuals.raw.gd.SUPPLEMENTAL_NUMBER | 72084.0 |
| annuals.raw.gd.created_at | 2025-12-05 14:43:58.289703 |
| annuals.raw.gd.report_data.ADDITIONAL_INFORMATION | The decade information is compiled by Accounting information. The Accounting process retires assets based on Accounting rules and principles. Not if the asset is physically retired. The decade information is representation of Accounting not Operating practices |
| annuals.raw.gd.report_data.AVERAGE_LENGTH | 111.0 |
| annuals.raw.gd.report_data.FED_LAND_LEAKS_REPAIRED | 0.0 |
| annuals.raw.gd.report_data.FILING_DATE | 2025-03-13T00:00:00 |
1474 additional key/value pairs available.
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