Data last collected:
PowerPlantFactsEvidence report · prepared 19 October 2026https://powerplantfacts.com/entity/59437
EIA plant 59437
Old Town · Penobscot · ME
Stillwater B
Operated by Brookfield Black Bear Hydro, LLC
Published location
Where is Stillwater B?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
44.912667, -68.683833
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 ME 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.
1799
2799
31,017
4914
5922
61,356
71,267
8914
9716
10698
11498
12614
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 | 799 |
| 2 | 799 |
| 3 | 1,017 |
| 4 | 914 |
| 5 | 922 |
| 6 | 1,356 |
| 7 | 1,267 |
| 8 | 914 |
| 9 | 716 |
| 10 | 698 |
| 11 | 498 |
| 12 | 614 |
2024 monthly net generation
| Month | Net generation |
|---|---|
| 1 | 799 MWh |
| 2 | 799 MWh |
| 3 | 1,017 MWh |
| 4 | 914 MWh |
| 5 | 922 MWh |
| 6 | 1,356 MWh |
| 7 | 1,267 MWh |
| 8 | 914 MWh |
| 9 | 716 MWh |
| 10 | 698 MWh |
| 11 | 498 MWh |
| 12 | 614 MWh |
Operating generators
| ID | Technology | Fuel | MW | Status |
|---|---|---|---|---|
| SWB-1 | Conventional Hydroelectric | WAT | 0.8 | OP |
| SWB-2 | Conventional Hydroelectric | WAT | 0.8 | OP |
| SWB-3 | Conventional Hydroelectric | WAT | 0.8 | OP |
Continue exploring
Similar-capacity plants in the same state
Identity, technology and limitations
EIA plant ID
59437
Sector
IPP Non-CHP
Water source
Penobscot 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 Stillwater B 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 Stillwater B
Variation in the published months
Across 12 numeric monthly generation entries, 6 has the highest recorded value (1,356 MWh) and 11 the lowest (498 MWh). Their difference is 858 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 |
|---|---|---|---|---|---|
| SWB-1 | Conventional Hydroelectric | 0.8 | 0.8 | 0.8 | 0.3 |
| SWB-2 | Conventional Hydroelectric | 0.8 | 0.8 | 0.8 | 0.3 |
| SWB-3 | Conventional Hydroelectric | 0.8 | 0.8 | 0.8 | 0.3 |
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.