# Relationship history for MSHA mine 2200187

Current hierarchy: **Larry  Bonds → Bonds Company Inc → Tremont Plant & Pit**

- 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:** B & B Construction Company Inc → Tremont Plant & Pit; 1950-01-01 to 1981-08-18; source msha-controller-operator-history
- **controller_controls_mine:** Blanton J C & Gene → Tremont Plant & Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blanton J C & Gene → B & B Construction Company Inc; 1950-01-01 to 1981-08-18; source msha-controller-operator-history
- **operator_operates_mine:** Bonds Company Inc → Tremont Plant & Pit; 1981-08-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Bonds → Tremont Plant & Pit; 1981-08-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Bonds → Bonds Company Inc; 1981-08-19 to current/open; source msha-controller-operator-history