# Relationship history for MSHA mine 3609587

Current hierarchy: **Robert A  Coleman → Butch Bluestone LLC → Four Star Quarry**

- 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

- **controller_controls_mine:** Robert A  Coleman → Four Star Quarry; 1996-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Endless Mountain Stone Co → Four Star Quarry; 2008-01-28 to 2024-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Robert A  Coleman → Endless Mountain Stone Co; 2008-01-28 to 2024-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Butch Bluestone LLC → Four Star Quarry; 2024-02-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert A  Coleman → Four Star Quarry; 2024-02-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert A  Coleman → Butch Bluestone LLC; 2024-02-29 to current/open; source msha-controller-operator-history