Spearfish Hydro
Hydro power plant in Lawrence County, South Dakota. 4 MW of nameplate capacity across 2 generators, operated by City of Spearfish - (SD).
Also known as Spearfish Hydroelectric Plant · EIA plant 58438
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 4 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- October 1912First generator online
- Operator
- City of Spearfish - (SD)EIA operator ID 58434
- Grid
- WACMBalancing authority WACM
- Price nodes
- None linkedNo verified ISO node
- Location
- Lawrence County, SD44.4783, −103.8547
- EIA plant ID
- 58438EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Spearfish Hydro produces
Free · EIA-923Net generation, 2025
18.4 GWh
18,404 MWh, final
Capacity factor, 2025
52.5%
2024: 56.7%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
1.7–21.4
GWh a year. Low 2017, high 2023
| 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 | 1 | 0.0% | 12 of 12 |
| 2014 | 3,043 | 8.7% | 12 of 12 |
| 2015 | 3,151 | 9.0% | 12 of 12 |
| 2016 | 2,194 | 6.2% | 12 of 12 |
| 2017 | 1,685 | 4.8% | 12 of 12 |
| 2018 | 2,145 | 6.1% | 12 of 12 |
| 2019 | 3,151 | 9.0% | 12 of 12 |
| 2020 | 3,150 | 9.0% | 12 of 12 |
| 2021 | 3,151 | 9.0% | 12 of 12 |
| 2022 | 2,027 | 5.8% | 12 of 12 |
| 2023 | 21,425 | 61.1% | 12 of 12 |
| 2024 | 19,930 | 56.7% | 12 of 12 |
| 2025 | 18,404 | 52.5% | 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 accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
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 |
|---|---|---|---|
| TURB1 | Conventional Hydroelectric | 2.0 | October 1912 |
| TURB2 | Conventional Hydroelectric | 2.0 | October 1912 |
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 City of Spearfish - (SD) as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
300 analyst questions a month, plus MCP
Query Spearfish Hydro and 14,224 other projects from Claude or your own tools. Free accounts get 1 question a day.
Power plants near Spearfish Hydro
Questions about Spearfish Hydro
How much power does Spearfish Hydro produce?
Spearfish Hydro reported 18,404 MWh (18.4 GWh) of net generation in 2025, a 52.5% capacity factor on 4 MW of nameplate capacity.
Where is Spearfish Hydro?
Spearfish Hydro is in Lawrence County, South Dakota, at 44.4783, −103.8547. It is in the Western Area Power Administration - Rocky Mountain Region balancing area (WACM).
Who operates Spearfish Hydro?
EIA-860M for August 2026 lists City of Spearfish - (SD) as the operator (EIA operator ID 58434). The operator is not always the owner.
When did Spearfish Hydro start operating?
Its first generator began operating in October 1912, according to EIA-860M.
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)
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page