Upper Sterling
Whiteside County, Illinois · EIA plant ID 7474 · Operator: City of Rock Falls - (IL)
Nameplate2MWSummer 2 MW
Generators2in service
Net generation0GWh12 mo to Dec 2025
Capacity factor1%hydro units, summer MW
Heat rate—thermal plants only
First online1988
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), hydro 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.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2002 | 7.3 | 41.8% | — |
| 2003 | 8.3 | 47.4% | — |
| 2004 | 6.8 | 38.5% | — |
| 2005 | 6.2 | 35.4% | — |
| 2006 | 7 | 40.2% | — |
| 2007 | 5.2 | 29.9% | — |
| 2008 | 0.8 | 4.6% | — |
| 2009 | 6 | 34.0% | — |
| 2010 | 3.4 | 19.2% | — |
| 2011 | 6.8 | 38.6% | — |
| 2012 | 6.5 | 36.8% | — |
| 2013 | 6.6 | 37.6% | — |
| 2014 | 8.7 | 49.7% | — |
| 2015 | 10.1 | 57.5% | — |
| 2016 | 7.7 | 43.9% | — |
| 2017 | 10.7 | 60.9% | — |
| 2018 | 8.4 | 48.2% | — |
| 2019 | 7.1 | 40.6% | — |
| 2020 | 7.5 | 42.5% | — |
| 2021 | 9.9 | 56.5% | — |
| 2022 | 12 | 68.6% | — |
| 2023 | 9.2 | 52.5% | — |
| 2024 | 8.9 | 50.8% | — |
| 2025 | 0.2 | 0.9% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | HY | 1.1 | 1 | Jun 1988 | Operating (Out of service, expected back within the year) | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 1.1 | 1 | Jun 1988 | Operating (Out of service, expected back within the year) | — | coming soon |
Owner / operator
Operator: City of Rock Falls - (IL). Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| City of Rock Falls - (IL) | 100.0% | 2 MW |
Nearby plants
Within 80 km.
| Avenue A Generator Sets | 4 MW | 1.2 km |
| Industrial Park | 13 MW | 2.1 km |
| SCS Beltway 011754 Rock Falls, LLC | 1 MW | 2.3 km |
| Nelson Energy Center | 628 MW | 6 km |
| Invenergy Nelson Expansion LLC | 380 MW | 6.1 km |
| Galt | 5 MW | 6.9 km |