Avalon/Mayo Hydropower
ROCKINGHAM County, North Carolina · EIA plant ID 54801 · Operator: Avalon/Mayo Hydropower LLC
Nameplate1MWSummer 1 MW
Generators3in service
Net generation2GWh12 mo to Aug 2026
Capacity factor19%hydro units, summer MW
Heat rate—thermal plants only
First online1997
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
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) |
|---|---|---|---|
| 2001 | 1.6 | 15.6% | — |
| 2002 | 1.9 | 17.9% | — |
| 2003 | 5.2 | 49.2% | — |
| 2004 | 4.4 | 42.2% | — |
| 2005 | 5.1 | 48.9% | — |
| 2006 | 3.9 | 37.3% | — |
| 2007 | 3.7 | 35.3% | — |
| 2008 | 2.6 | 24.7% | — |
| 2009 | 3.7 | 35.3% | — |
| 2010 | 4.5 | 42.6% | — |
| 2011 | 3.3 | 31.4% | — |
| 2012 | 3.1 | 29.7% | — |
| 2013 | 5.3 | 50.5% | — |
| 2014 | 4.1 | 39.2% | — |
| 2015 | 4 | 38.4% | — |
| 2016 | 5.2 | 49.8% | — |
| 2017 | 3.7 | 35.1% | — |
| 2018 | 4.9 | 46.2% | — |
| 2019 | 5.7 | 54.1% | — |
| 2020 | 6.5 | 61.6% | — |
| 2021 | 5.8 | 55.3% | — |
| 2022 | 4.7 | 45.2% | — |
| 2023 | 4.6 | 43.7% | — |
| 2024 | 4.1 | 38.5% | — |
| 2025 | 3.1 | 29.7% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| GEN1 | Conventional Hydroelectric | HY | 0.8 | 0.8 | Apr 1997 | Operating | — | coming soon |
| GEN2 | Conventional Hydroelectric | HY | 0.3 | 0.3 | May 2000 | Operating | — | coming soon |
| GEN3 | Conventional Hydroelectric | HY | 0.1 | 0.1 | May 2000 | Operating | — | coming soon |
Owner / operator
Operator: Avalon/Mayo Hydropower LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Avalon/Mayo Hydropower LLC | 100.0% | 1 MW |
Nearby plants
Within 80 km.
| Moyer Solar | 5 MW | 4.1 km |
| Rockingham County CT Station | 978 MW | 15.2 km |
| Bear Branch Solar | — | 18.4 km |
| Belews Creek | 2,491 MW | 18.6 km |
| Carol Jean Solar | 4 MW | 20.9 km |
| Sunny Rock Solar, LLC | 20 MW | 21.6 km |