Tiber Dam Hydroelectric Plant
Liberty County, Montana · EIA plant ID 56499 · Operator: Tiber Montana LLC
Nameplate8MWSummer 8 MW
Generators1in service
Net generation31GWh12 mo to Dec 2025
Capacity factor47%hydro units, summer MW
Heat rate—thermal plants only
First online2004
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) |
|---|---|---|---|
| 2006 | 43 | 65.4% | — |
| 2007 | 38.9 | 59.2% | — |
| 2008 | 43.4 | 65.9% | — |
| 2009 | 50.8 | 77.4% | — |
| 2010 | 41.9 | 63.7% | — |
| 2011 | 58.3 | 88.7% | — |
| 2012 | 52.5 | 79.6% | — |
| 2013 | 52 | 79.1% | — |
| 2014 | 55.6 | 84.7% | — |
| 2015 | 54.8 | 83.5% | — |
| 2016 | 52.3 | 79.4% | — |
| 2017 | 51.1 | 77.8% | — |
| 2018 | 53.5 | 81.5% | — |
| 2019 | 55.8 | 84.9% | — |
| 2020 | 54.5 | 82.8% | — |
| 2021 | 50.3 | 76.6% | — |
| 2022 | 45.7 | 69.5% | — |
| 2023 | 44 | 67.0% | — |
| 2024 | 36.1 | 54.8% | — |
| 2025 | 31.2 | 47.4% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| HY1 | Conventional Hydroelectric | HY | 7.5 | 7.5 | Jun 2004 | Operating | — | coming soon |
Owner / operator
Operator: Tiber Montana LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Tiber Montana LLC | 100.0% | 8 MW |
Nearby plants
Within 80 km.
| NaturEner Glacier Wind Energy 1 | 107 MW | 77.4 km |