# Relationship history for MSHA mine 4605144

Current hierarchy: **K Dale  Tolliver → Camp Creek Service Center Ltd → Still Run 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Sioux Coal Company Inc → Still Run No 1; 1976-03-01 to 1980-06-17; source msha-controller-operator-history
- **controller_controls_mine:** George E  Cartwright → Still Run No 1; 1976-03-01 to 1980-06-17; source msha-controller-operator-history
- **controller_controls_operator:** George E  Cartwright → Sioux Coal Company Inc; 1976-03-01 to 1980-06-17; source msha-controller-operator-history
- **controller_controls_mine:** Roy L  McCoy et al → Still Run No 1; 1977-06-24 to 1999-05-20; source msha-controller-operator-history
- **operator_operates_mine:** Last Chance Coal Company → Still Run No 1; 1980-06-18 to 1999-05-20; source msha-controller-operator-history
- **controller_controls_operator:** Roy L  McCoy et al → Last Chance Coal Company; 1980-06-18 to 1999-05-20; source msha-controller-operator-history
- **controller_controls_mine:** K Dale  Tolliver et al → Still Run No 1; 1997-08-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Camp Creek Service Center Ltd → Still Run No 1; 1999-05-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** K Dale  Tolliver et al → Camp Creek Service Center Ltd; 1999-05-21 to current/open; source msha-controller-operator-history