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Utility solar · Brown County, Texas
Mountaineer Solar
A 329 MW utility solar project in Brown County, Texas. Mountaineer Solar has asked to connect to the grid or filed for its first approvals; nothing on record yet commits money to it. Public records name Mustang Mountaineer Solar LLC as its developer. No public record read so far names its builder.
The record
What the public record says about Mountaineer Solar, as of 22 Oct 2026.
| Stage | Queued |
|---|---|
| Construction start | Q4 2027 estimate |
| Size | 329 MW |
| Location | Brown County, Texas (to about 10 km) |
| Developer | Mustang Mountaineer Solar LLC |
| Grid operator | ERCOT |
| Builder (EPC) | Not named yet |
| Trade subcontractors | in the app |
| People to call | in the app |
| Phase windows | in the app |
Every fact in the app links to the public record behind it, with how many records agree and whether it is confirmed, reported or an estimate. What the terms mean.
What happened
Each change dated by the scene or the document, newest first.
No change on record since Groundtrace started tracking it.
Who was named on it, and when, is in the app.
Also in Brown County
| Project | Stage | Size |
|---|---|---|
| Chisme SolarUtility solar | Under construction | 147 MW |
| Chisme StorageBattery storage | Pre-construction | 151 MW |
| Brookesmith StorageBattery storage | Queued | 351 MW |
| Soluce Bravo StorageBattery storage | Queued | 303 MW |
| Horseshoe Bend SolarUtility solar | Queued | 301 MW |
| Nouveau BESSBattery storage | Queued | 256 MW |
More
Questions
Mountaineer Solar, in short.
Where is Mountaineer Solar?
Mountaineer Solar is a 329 MW utility solar project in Brown County, Texas, in ERCOT's interconnection queue. The public page places it to within about ten kilometres; the precise location is in the subscriber record.
When does construction start on Mountaineer Solar?
Groundtrace estimates construction starts in the fourth quarter of 2027. This is an estimate from the project's filings, not a date any record states; the exact date and the record behind it are in the subscriber record.
Who is developing Mountaineer Solar?
Mustang Mountaineer Solar LLC, as the public record names it.
Who is building Mountaineer Solar?
No public record read so far names a builder for Mountaineer Solar. Groundtrace leaves the field empty rather than guess, and fills it when a permit, a filing or the builder's own page names one.
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