Data last collected:
PowerPlantFactsEvidence report · prepared 19 October 2026https://powerplantfacts.com/entity/58366
EIA plant 58366
Alpaugh · Tulare · CA
Atwell Island
Operated by SPS Atwell Island LLC
Published location
Where is Atwell Island?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
35.895000, -119.510833
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 CA 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.
11,482
22,149
33,009
43,368
53,994
63,659
73,380
83,452
93,261
102,439
111,753
121,322
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 | 1,482 |
| 2 | 2,149 |
| 3 | 3,009 |
| 4 | 3,368 |
| 5 | 3,994 |
| 6 | 3,659 |
| 7 | 3,380 |
| 8 | 3,452 |
| 9 | 3,261 |
| 10 | 2,439 |
| 11 | 1,753 |
| 12 | 1,322 |
2024 monthly net generation
| Month | Net generation |
|---|---|
| 1 | 1,482 MWh |
| 2 | 2,149 MWh |
| 3 | 3,009 MWh |
| 4 | 3,368 MWh |
| 5 | 3,994 MWh |
| 6 | 3,659 MWh |
| 7 | 3,380 MWh |
| 8 | 3,452 MWh |
| 9 | 3,261 MWh |
| 10 | 2,439 MWh |
| 11 | 1,753 MWh |
| 12 | 1,322 MWh |
Operating generators
| ID | Technology | Fuel | MW | Status |
|---|---|---|---|---|
| 1 | Solar Photovoltaic | SUN | 20.2 | OP |
Continue exploring
Similar-capacity plants in the same state
Identity, technology and limitations
EIA plant ID
58366
Sector
IPP Non-CHP
Water source
Unavailable
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 Atwell Island 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 Atwell Island
Variation in the published months
Across 12 numeric monthly generation entries, 5 has the highest recorded value (3,994 MWh) and 12 the lowest (1,322 MWh). Their difference is 2,672 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 |
|---|---|---|---|---|---|
| 1 | Solar Photovoltaic | 20.2 | 15.7 | 12.48 | Not supplied |
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.