# Relationship history for MSHA mine 0504705

Current hierarchy: **Ross  Wheeler; Tim  Dole → Monument Rock → MONUMENT ROCK**

- 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:** Monument Rock → MONUMENT ROCK; 2001-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tim  Dole et al → MONUMENT ROCK; 2001-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim  Dole et al → Monument Rock; 2001-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ross  Wheeler et al → Monument Rock; 2001-05-01 to current/open; source msha-controller-operator-history