# Relationship history for MSHA mine 3102299

Current hierarchy: **Estate of Ronnie Stevens → Carolina Greystone Quarries, LLC → Great Acres**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Carolina Greystone Quarries, LLC → Great Acres; 2015-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Estate of Ronnie Stevens → Great Acres; 2015-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Estate of Ronnie Stevens → Carolina Greystone Quarries, LLC; 2015-08-24 to current/open; source msha-controller-operator-history