# Relationship history for MSHA mine 3402074

Current hierarchy: **David  Bernard → Lucky Buck Stone → Madison 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** David  Bernard → Madison Pit; 2008-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lucky Buck Stone → Madison Pit; 2008-10-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Bernard → Lucky Buck Stone; 2008-10-08 to current/open; source msha-controller-operator-history