# Relationship history for MSHA mine 0404666

Current hierarchy: **Boyle Eugene H Jr → Boyle Exploration & Development → Gleason Diggings**

- 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:** Mineral Recovery & Mining Inc → Gleason Diggings; 1983-08-01 to 1984-06-19; source msha-controller-operator-history
- **controller_controls_mine:** Woods J G → Gleason Diggings; 1983-08-01 to 1984-06-19; source msha-controller-operator-history
- **controller_controls_operator:** Woods J G → Mineral Recovery & Mining Inc; 1983-08-01 to 1984-06-19; source msha-controller-operator-history
- **operator_operates_mine:** Boyle Exploration & Development → Gleason Diggings; 1984-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Boyle Eugene H Jr Et Al → Gleason Diggings; 1984-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Boyle Eugene H Jr Et Al → Boyle Exploration & Development; 1984-06-20 to current/open; source msha-controller-operator-history