Lake Preston
Kingsbury County, South Dakota · EIA plant ID 3352 · Operator: Otter Tail Power Co
Nameplate24MWSummer 19 MW
Generators1in service
Net generation0GWh12 mo to Dec 2025
Capacity factor0%gas/coal/oil units, summer MW
Heat rate—Btu/kWhfossil units, electric fuel, HHV
First online1978Runs as rarely runs
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 1.3 | — | — |
| 2002 | 0.2 | — | — |
| 2003 | 2.3 | 0.6% | 18,213 |
| 2004 | 1 | 0.6% | 19,789 |
| 2005 | 3 | 1.5% | 21,926 |
| 2006 | 0.5 | 0.3% | 26,151 |
| 2007 | 1.1 | 0.6% | 22,389 |
| 2008 | 0.3 | 0.2% | 27,778 |
| 2009 | 0.3 | 0.2% | 21,105 |
| 2010 | 1 | 0.5% | 20,487 |
| 2011 | 0.1 | 0.1% | — |
| 2012 | 0.1 | 0.1% | — |
| 2013 | 0.2 | 0.1% | 21,743 |
| 2014 | 0.5 | 0.3% | 29,179 |
| 2015 | 0.1 | 0.1% | 25,862 |
| 2016 | 0.4 | 0.2% | 26,941 |
| 2017 | 0.4 | 0.2% | 23,511 |
| 2018 | 0.5 | 0.3% | 22,706 |
| 2019 | 0.3 | 0.1% | 29,952 |
| 2020 | 0.1 | 0.1% | — |
| 2021 | 1.3 | 0.7% | 19,839 |
| 2022 | 0.2 | 0.1% | — |
| 2023 | 0.1 | 0.1% | 20,053 |
| 2024 | 0.1 | 0.1% | — |
| 2025 | 0.1 | 0.1% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1A | Petroleum Liquids | GT | 24.1 | 18.6 | Jun 1978 | Operating (Standby / backup) | — | coming soon |
| 1 | Petroleum Liquids | GT | 24.1 | 21.2 | — | Retired Jan 1978 | — | coming soon |
Owner / operator
Operator: Otter Tail Power Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Otter Tail Power Co | 100.0% | 24 MW |
Nearby plants
Within 80 km.
| Brookings Solar | — | 51.9 km |
| Buffalo Ridge II LLC | 210 MW | 62.6 km |
| Bob Glanzer Generating Station | 69 MW | 62.9 km |
| Huron | retired | 62.9 km |
| Clark (SD) | 3 MW | 63.3 km |
| Watertown Power Plant | 68 MW | 63.5 km |