# Relationship history for MSHA mine 0901000

Current hierarchy: **David W  Dye → Broad River Quarries LLC → Broad River Quarries LLC**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Vaughn Granite Company → Broad River Quarries LLC; 1987-04-01 to 2003-07-27; source msha-controller-operator-history
- **controller_controls_mine:** William Lee  Vaughn → Broad River Quarries LLC; 1987-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William Lee  Vaughn → Vaughn Granite Company; 1987-04-01 to 2003-07-27; source msha-controller-operator-history
- **operator_operates_mine:** Broad River Quarries LLC → Broad River Quarries LLC; 2003-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David W  Dye  et al → Broad River Quarries LLC; 2003-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David W  Dye  et al → Broad River Quarries LLC; 2003-07-28 to current/open; source msha-controller-operator-history