Data last collected:
PowerPlantFactsEvidence report · prepared 19 October 2026https://powerplantfacts.com/entity/55479
EIA plant 55479
Gillette · Campbell · WY
Wygen 1
Operated by Black Hills Power, Inc.
Published location
Where is Wygen 1?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
44.285800, -105.383300
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Capacity is not generation. Nameplate MW describes equipment; annual MWh describes recorded output. Proposed and retired units are not added to operating capacity.
Equipment mix
Operating capacity by technology
Grouped from this plant’s represented generator records. Use the WY plant index for regional peers.
See the evidence
Electricity output across the year
Monthly net generation shows the seasonal shape of this plant's represented output. A negative value is retained when the source reports net consumption.
159,610
256,701
366,751
457,504
522,099
6858
71,002
853,270
957,736
1061,360
1159,111
1260,441
MWh net generation · 2024 final edition · EIA 923 represented operating rows. 12 of 12 supplied rows shown; 0 missing values omitted. Months with no reported numeric value are omitted, not treated as zero.
Read the chart as a table
| Record | MWh net generation |
|---|---|
| 1 | 59,610 |
| 2 | 56,701 |
| 3 | 66,751 |
| 4 | 57,504 |
| 5 | 22,099 |
| 6 | 858 |
| 7 | 1,002 |
| 8 | 53,270 |
| 9 | 57,736 |
| 10 | 61,360 |
| 11 | 59,111 |
| 12 | 60,441 |
2024 monthly net generation
| Month | Net generation |
|---|---|
| 1 | 59,610 MWh |
| 2 | 56,701 MWh |
| 3 | 66,751 MWh |
| 4 | 57,504 MWh |
| 5 | 22,099 MWh |
| 6 | 858 MWh |
| 7 | 1,002 MWh |
| 8 | 53,270 MWh |
| 9 | 57,736 MWh |
| 10 | 61,360 MWh |
| 11 | 59,111 MWh |
| 12 | 60,441 MWh |
Operating generators
| ID | Technology | Fuel | MW | Status |
|---|---|---|---|---|
| 0001 | Conventional Steam Coal | SUB | 90 | OP |
Continue exploring
Similar-capacity plants in the same state
Identity, technology and limitations
EIA plant ID
55479
Sector
IPP Non-CHP
Water source
Wells
Data edition
2024-final
Use this record
Questions this evidence can answer
01What exactly is this record?
Use the name, place, date and identifiers above to confirm that you have the right Wygen 1 power plant: capacity and generation | PowerPlantFacts record.
02What does the evidence establish?
Read the reported values with their units, coverage dates and source notes. Keep observed facts separate from estimates or interpretation.
03What should I verify next?
Follow the primary-source links and check the limitations before using this evidence for a decision, comparison or citation.
A closer look at Wygen 1
Variation in the published months
Across 12 numeric monthly generation entries, 3 has the highest recorded value (66,751 MWh) and 6 the lowest (858 MWh). Their difference is 65,893 MWh. Missing months have not been treated as zero.
Generator capacity in different operating conditions
| Generator ID | Technology | Nameplate MW | Summer MW | Winter MW | Minimum load MW |
|---|---|---|---|---|---|
| 0001 | Conventional Steam Coal | 90.0 | 85.0 | 86.0 | 57.2 |
EIA-860 2024 final source. Ratings describe capacity, not actual generation or availability. Missing ratings are not zero.
Source: US Energy Information Administration Form EIA-860 2024 plant and operable-generator workbooks; archive 2024. US EIA-authored information is generally public domain; cite EIA, preserve third-party exceptions, changes and no-endorsement context. Source-specific derived data.