---
title: "BM Great Rock Energy Center"
description: "BM Great Rock Energy Center: 1981 MW Gas project in Leon County, ERCOT NORTH developed by Black Mountain Energy Storage II. Currently No IA; build-chance 1%. Independent ERCOT queue tracking by Matt Prusak."
canonical: "https://www.ercotqueue.com/project/30INR0091"
markdown: "https://www.ercotqueue.com/project/30INR0091.md"
resource_type: "project"
source_report: "August 2026"
generated_at: "2026-09-08T19:34:08.442Z"
license: "https://creativecommons.org/licenses/by/4.0/"
---

# BM Great Rock Energy Center

BM Great Rock Energy Center is an ERCOT generation interconnection record identified by INR 30INR0091.

## Current reported project fields

| Field | Value |
| --- | --- |
| INR | 30INR0091 |
| Developer | [Black Mountain Energy Storage II](https://www.ercotqueue.com/developer/black-mountain-energy-storage-ii.md) |
| Fuel / technology | Gas / CC |
| Capacity | 1,981.2 MW |
| County | Leon County |
| ERCOT zone | NORTH |
| Point of interconnection | Tap <345kV> <967> <GIBN_CREK_5> - <46020> <LIMEST_POI_5> Ckt<18> and  <345kV> <79007> < YELLOW WOLF> - <46020> <LIMEST_POI_5> Ckt<50> |
| Projected commercial-operation date | 2029-05-15 |
| Reported status | SS Completed, FIS Started, No IA |
| Funnel stage | No interconnection agreement |

County is the public geographic precision used by ERCOTQueue. Map symbols are county-level evidence and are not exact project coordinates.

## Independently derived Build Chance

| Measure | Value |
| --- | ---: |
| Validation-selected Build Chance | 1% |
| P05 | 1% |
| P50 | 1% |
| P95 | 12% |

### Score factors

| Factor | Percentage-point contribution |
| --- | ---: |
| Stage base rate | +18.0 pp |
| Fuel adjustment | +5.3 pp |
| Developer-history adjustment | -10.0 pp |
| Stage-velocity adjustment | -10.0 pp |
| COD-slippage adjustment | 0.0 pp |
| FIS-progress adjustment | -4.5 pp |
| Capacity adjustment | +1.3 pp |

These factors are ERCOTQueue derivations. The displayed probability is not an ERCOT forecast or an official project status.

## Reported milestones

| Milestone | Date |
| --- | --- |
| screening started | 2026-03-03 |
| screening complete | 2026-05-25 |
| fis requested | 2026-02-19 |

## Observed monthly history

- First seen: 2026-02
- Last seen: 2026-08
- Appearances: 7
- Score-series basis: Monthly points use the as-of seven-factor raw model on the validation-selected raw scale because the current isotonic candidate did not pass the project-purged application guard. The final point is anchored to the published current project score. The series shows trajectory, not a previously published frozen forecast.

The 30 most recent observed changes are shown below. The public JSON contains the complete history.

| Report month | Change | Detail |
| --- | --- | --- |
| 2026-02 | Funnel stage | First observation to No IA |

Complete project-history JSON: [https://www.ercotqueue.com/data/project_history/30INR0091.json](https://www.ercotqueue.com/data/project_history/30INR0091.json)

## Field provenance

- Reported fields: INR, name, developer, capacity, fuel, county, zone, point of interconnection, projected COD, status, and dated milestones.
- Derived fields: funnel stage, COD-delay indicators, Build Chance, factor contributions, and uncertainty range.
- Current project dataset: [https://www.ercotqueue.com/data/projects.json](https://www.ercotqueue.com/data/projects.json)
- Current flat CSV: [https://www.ercotqueue.com/data/projects.csv](https://www.ercotqueue.com/data/projects.csv)

## Source, citation, and reuse

- Human-readable page: [BM Great Rock Energy Center](https://www.ercotqueue.com/project/30INR0091)
- Markdown representation: [https://www.ercotqueue.com/project/30INR0091.md](https://www.ercotqueue.com/project/30INR0091.md)
- Source report: August 2026
- Site refresh: September 2026
- Methodology: [ERCOTQueue methodology](https://www.ercotqueue.com/methodology)
- License: [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/)
- Source data (application/json): [https://www.ercotqueue.com/data/projects.json](https://www.ercotqueue.com/data/projects.json)

ERCOTQueue distinguishes reported source fields from independently derived analysis. Queue capacity records development and interconnection activity; it does not establish financing, construction, or commercial operation. Build Chance is a research signal, not a guarantee or investment recommendation.