Data last collected:
PowerPlantFactsEvidence report · prepared 19 October 2026https://powerplantfacts.com/entity/4056
EIA plant 4056
Prairie du Sac · Sauk · WI
Prairie Du Sac
Operated by Wisconsin Power & Light Co
Published location
Where is Prairie Du Sac?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
43.309932, -89.727778
Open the interactive map ↗Map data © OpenStreetMap contributors
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 WI 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.
17,918
212,536
37,342
415,316
515,897
614,593
714,252
815,072
98,766
106,585
1114,553
1210,952
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 | 7,918 |
| 2 | 12,536 |
| 3 | 7,342 |
| 4 | 15,316 |
| 5 | 15,897 |
| 6 | 14,593 |
| 7 | 14,252 |
| 8 | 15,072 |
| 9 | 8,766 |
| 10 | 6,585 |
| 11 | 14,553 |
| 12 | 10,952 |
2024 monthly net generation
| Month | Net generation |
|---|---|
| 1 | 7,918 MWh |
| 2 | 12,536 MWh |
| 3 | 7,342 MWh |
| 4 | 15,316 MWh |
| 5 | 15,897 MWh |
| 6 | 14,593 MWh |
| 7 | 14,252 MWh |
| 8 | 15,072 MWh |
| 9 | 8,766 MWh |
| 10 | 6,585 MWh |
| 11 | 14,553 MWh |
| 12 | 10,952 MWh |
Operating generators
| ID | Technology | Fuel | MW | Status |
|---|---|---|---|---|
| 3 | Conventional Hydroelectric | WAT | 4.8 | OP |
| 4 | Conventional Hydroelectric | WAT | 4.8 | OP |
| 2 | Conventional Hydroelectric | WAT | 4.3 | OP |
| 5 | Conventional Hydroelectric | WAT | 4 | OP |
| 6 | Conventional Hydroelectric | WAT | 4 | OP |
| 7 | Conventional Hydroelectric | WAT | 4 | OP |
| 8 | Conventional Hydroelectric | WAT | 4 | OP |
| 1 | Conventional Hydroelectric | WAT | 3.5 | OP |
Continue exploring
Similar-capacity plants in the same state
Identity, technology and limitations
EIA plant ID
4056
Sector
Electric Utility
Water source
Wisconsin River
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 Prairie Du Sac 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 Prairie Du Sac
Variation in the published months
Across 12 numeric monthly generation entries, 5 has the highest recorded value (15,897 MWh) and 10 the lowest (6,585 MWh). Their difference is 9,312 MWh. Missing months have not been treated as zero.
Reading the MW column
In the 8 numeric rows displayed in this table, MW ranges from 3.5 (1) to 4.8 (3, 4). The difference is 1.3 in the column's stated units. This summary covers the displayed rows and retains the table's period and scope.
Generator capacity in different operating conditions
| Generator ID | Technology | Nameplate MW | Summer MW | Winter MW | Minimum load MW |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 3.5 | 29.0 | 29.0 | 0.7 |
| 2 | Conventional Hydroelectric | 4.3 | Not supplied | Not supplied | 0.9 |
| 3 | Conventional Hydroelectric | 4.8 | Not supplied | Not supplied | 1.0 |
| 4 | Conventional Hydroelectric | 4.8 | Not supplied | Not supplied | 1.0 |
| 5 | Conventional Hydroelectric | 4.0 | Not supplied | Not supplied | 0.7 |
| 6 | Conventional Hydroelectric | 4.0 | Not supplied | Not supplied | 0.7 |
| 7 | Conventional Hydroelectric | 4.0 | Not supplied | Not supplied | 0.7 |
| 8 | Conventional Hydroelectric | 4.0 | Not supplied | Not supplied | 0.7 |
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.