# Mammoth Plains

SPP asset profile · https://askthegrid.com/assets/facilities/mammoth-plains

## Current generation inventory

EIA plant 59284 · Inventory reporting month: 2026-08.

- wind: 226.1 MW operating nameplate
- Capacity basis: operating_generator_nameplate_mw
- Source inventory: [EIA-860M workbook (preliminary)](https://www.eia.gov/electricity/data/eia860m/xls/august_generator2026.xlsx)
- Inventory retrieved: 2026-10-10T02:12:40.665346+00:00
- Filed coordinate (longitude, latitude): -98.71028, 35.978889
- OSM extract: 2026-10-08T20:21:06Z
- OSM mapped edit: 2024-03-25 04:13:10+00:00
- Map prepared: 2026-10-10T02:28:20.750817+00:00

Battery power (MW) and stored energy (MWh) are separate measures. Shared physical-site membership does not establish electrical connectivity, settlement or a common export limit.

## Reviewed overview

Mammoth Plains is a 198.9 MW wind farm in Dewey and Blaine counties, Oklahoma, commissioned in 2014 with 117 GE 1.7-100 turbines. NextEra Energy Partners acquired the project in May 2015 as part of a 664 MW wind package from NextEra Energy Resources.

## Reviewed metrics

- **Nameplate capacity:** 226.1 MW — Canonical EIA plant baseline.
- **Registry anchor:** Plant 59284 — plant-59284

## Facts

- **Technology:** Onshore Wind Turbine
- **Operator:** Mammoth Plains Wind Project

## Related parties

- **Owner / acquirer:** NextEra Energy Partners, LP — owner
- **Offtaker:** Southwestern Public Service — offtaker
- **Equipment supplier:** GE Renewable Energy — equipment_supplier

## Sources

- [ippjournal.com](https://ippjournal.com/news/nextera-energy-partners-lp-closes-664-mw-asset-acquisition) — ippjournal.com · public_source — Source retained for exact-record publication review.
- [energymonitor.ai](https://www.energymonitor.ai/?p=105726) — energymonitor.ai · public_source — Source retained for exact-record publication review.

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Canonical page: https://askthegrid.com/assets/facilities/mammoth-plains

Source: Ask the Grid — https://askthegrid.com/