Data last collected:
PowerPlantFactsEvidence report · prepared 19 October 2026https://powerplantfacts.com/entity/10237
EIA plant 10237
Harrisville · Lewis · NY
Diana Hydroelectric
Operated by EONY Generation Limited
Published location
Where is Diana Hydroelectric?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
44.151944, -75.321725
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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 NY 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.
1987
2750
31,111
4826
5417
6438
7839
8812
9155
10135
11411
12840
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 | 987 |
| 2 | 750 |
| 3 | 1,111 |
| 4 | 826 |
| 5 | 417 |
| 6 | 438 |
| 7 | 839 |
| 8 | 812 |
| 9 | 155 |
| 10 | 135 |
| 11 | 411 |
| 12 | 840 |
2024 monthly net generation
| Month | Net generation |
|---|---|
| 1 | 987 MWh |
| 2 | 750 MWh |
| 3 | 1,111 MWh |
| 4 | 826 MWh |
| 5 | 417 MWh |
| 6 | 438 MWh |
| 7 | 839 MWh |
| 8 | 812 MWh |
| 9 | 155 MWh |
| 10 | 135 MWh |
| 11 | 411 MWh |
| 12 | 840 MWh |
Operating generators
| ID | Technology | Fuel | MW | Status |
|---|---|---|---|---|
| GEN1 | Conventional Hydroelectric | WAT | 1.8 | OP |
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Similar-capacity plants in the same state
Identity, technology and limitations
EIA plant ID
10237
Sector
IPP Non-CHP
Water source
West Branch Oswegatchie 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 Diana Hydroelectric 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 Diana Hydroelectric
Variation in the published months
Across 12 numeric monthly generation entries, 3 has the highest recorded value (1,111 MWh) and 10 the lowest (135 MWh). Their difference is 976 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 |
|---|---|---|---|---|---|
| GEN1 | Conventional Hydroelectric | 1.8 | 1.7 | 1.8 | 0.4 |
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.