A wind farm’s rated megawatts describe power capability; its operating record shows energy produced over time. The New Mexico Wind Energy Center is a useful case because its record includes years of generation, repowering and a transmission connection shared with another project.
Follow the project beyond its opening
PNM’s 2023 Integrated Resource Plan identifies the New Mexico Wind Energy Center near House, New Mexico, and describes a 200 MW delivery capability into PNM’s system. It also describes adjacent Casa Mesa using the same 200 MW interconnection. Adding the projects’ ratings therefore does not establish an equal increase in simultaneous delivery through that connection.
The plan’s historical performance table reports NMWEC capacity factors of 28% for 2018, 35% for 2019 and 33% for 2022, and attributes the 2019 output increase to repowering. Compare the equipment configuration and wind conditions when interpreting that change; the difference between two years is not a controlled measurement of one cause.
Keep records and forecasts in separate columns
PNM’s testimony for its 2026 Renewable Energy Act Plan describes expected NMWEC annual production of approximately 565,000 MWh. That is a planning expectation in the testimony, not a measured full-year result. Its attachment gives 2018 for repowering, while the 2023 plan gives 2019. For a precise commissioning chronology, resolve the equipment and acceptance milestones from underlying project records instead of silently choosing one date.
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| Field | Preferred record | Consistency check |
|---|---|---|
| Plant and generator identity | EIA plant code, generator IDs and owner records | Keep adjacent or renamed facilities separate |
| Capacity | Nameplate, seasonal capability or delivery limit | Identify which rating the calculation uses |
| Annual output | Reported net generation with units and year | Separate measured results from forecasts and REC allocations |
| Equipment changes | Repowering and commissioning documents | Split comparisons at material configuration changes |
| Local benefits | Dated payments, agreements or audited reports | Separate promised totals from documented receipts |
Use EIA-860 generator data to establish equipment identity and characteristics and EIA-923 generation data for reported output. Join records by identifiers and reporting year, check units and revisions, and retain the downloaded file version. A similarly named plant is insufficient to establish a match.
Check the energy arithmetic
Fictional annual-output example: a project with a constant 200 MW rating produces 600,000 MWh in a non-leap year. Its capacity factor is 600,000 ÷ (200 × 8,760) ≈ 34.2%.
If a clearly stated household comparison uses 10 MWh per household-year, that energy is equivalent to 60,000 such household-years. This compares annual energy quantities; continuous service also depends on the grid’s supply at each hour.
Capacity factor compares actual energy with the energy that continuous operation at the chosen rating would produce. Availability asks whether equipment was able to operate; it is a different measure. A project may be available during low wind or limited by its delivery arrangements.
Write a conclusion the record supports
A useful project assessment states which years and equipment it covers, the measured generation trend, the known delivery limit and the unresolved causes of variation. Check curtailment, maintenance and wind-resource evidence before attributing a weak year to turbine quality or a strong year solely to an upgrade.
Evaluate community and environmental claims on their own evidence. A forecast of lifetime lease and tax benefits needs subsequent payment records; an avoided-emissions estimate needs its electricity-system baseline and method. A generation table alone establishes neither.
Use the wind-output guide for the general method and the wind-farm proposal guide for site studies and community commitments.
Use the evidence record
Download the wind-project operating evidence record (plain text). Save a copy, replace the blank fields with dated evidence and keep the fictional example separate from your own figures.
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