# Relationship history for MSHA mine 0101511

Current hierarchy: **Charles R  Smith → Ace Mining Company Inc → Marion County Pit No 1**

- 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:** Charles R  Smith → Marion County Pit No 1; 1975-04-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ace Mining Company Inc → Marion County Pit No 1; 1976-05-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles R  Smith → Ace Mining Company Inc; 1976-05-04 to current/open; source msha-controller-operator-history