Upper Blackstone (MA) Treasure Valley
Solar power plant in Worcester County, Massachusetts. 5 MW of nameplate capacity across 1 generator, operated by Nexamp Treasure Valley Solar, LLC.
Also known as EIA plant 59781
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 5 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- July 2014First generator online
- Operator
- Nexamp Treasure Valley Solar, LLCEIA operator ID 59546
- Grid
- ISO-NEBalancing authority ISNE
- Price nodes
- 1 ISONE nodeResource nodes with prices
- Location
- Worcester County, MA42.3328, −71.9876
- EIA plant ID
- 59781EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Upper Blackstone (MA) Treasure Valley produces
Free · EIA-923Net generation, 2025
6.23 GWh
6,233 MWh, final
Capacity factor, 2025
14.2%
2024: 16.5%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
5.7–7.8
GWh a year. Low 2017, high 2016
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | Not reported | Not reported | 0 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | Not reported | Not reported | 0 of 12 |
| 2008 | Not reported | Not reported | 0 of 12 |
| 2009 | Not reported | Not reported | 0 of 12 |
| 2010 | Not reported | Not reported | 0 of 12 |
| 2011 | Not reported | Not reported | 0 of 12 |
| 2012 | Not reported | Not reported | 0 of 12 |
| 2013 | Not reported | Not reported | 0 of 12 |
| 2014 | 2,695 | Not reported | 6 of 12 |
| 2015 | 7,391 | 16.9% | 12 of 12 |
| 2016 | 7,755 | 17.7% | 12 of 12 |
| 2017 | 5,702 | 13.0% | 12 of 12 |
| 2018 | 6,567 | 15.0% | 12 of 12 |
| 2019 | 6,954 | 15.9% | 12 of 12 |
| 2020 | 6,876 | 15.7% | 12 of 12 |
| 2021 | 7,057 | 16.1% | 12 of 12 |
| 2022 | 7,070 | 16.1% | 12 of 12 |
| 2023 | 6,870 | 15.7% | 12 of 12 |
| 2024 | 7,256 | 16.5% | 12 of 12 |
| 2025 | 6,233 | 14.2% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · ISONEEmissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Solar Photovoltaic | 5.0 | July 2014 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Nexamp Treasure Valley Solar, LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Modeled curtailment
A range, not one number. The lower bound counts hours inside the production tax credit window; the upper bound is the no-credit case.
Expected vs reported generation
Monthly modeled expected output and physical potential next to EIA-923 reported output.
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Questions about Upper Blackstone (MA) Treasure Valley
How much power does Upper Blackstone (MA) Treasure Valley produce?
Upper Blackstone (MA) Treasure Valley reported 6,233 MWh (6.23 GWh) of net generation in 2025, a 14.2% capacity factor on 5 MW of nameplate capacity.
Where is Upper Blackstone (MA) Treasure Valley?
Upper Blackstone (MA) Treasure Valley is in Worcester County, Massachusetts, at 42.3328, −71.9876. It is in the ISO New England Inc. balancing area (ISNE).
Who operates Upper Blackstone (MA) Treasure Valley?
EIA-860M for August 2026 lists Nexamp Treasure Valley Solar, LLC as the operator (EIA operator ID 59546). The operator is not always the owner.
When did Upper Blackstone (MA) Treasure Valley start operating?
Its first generator began operating in July 2014, according to EIA-860M.
Does InfraMap have power prices for Upper Blackstone (MA) Treasure Valley?
Yes. InfraMap has ISONE day-ahead and real-time prices at 1 price node linked to Upper Blackstone (MA) Treasure Valley, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- ISONE day-ahead and real-time prices; node and hub assignments as of 2026-10-05
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page