# Relationship history for MSHA mine 4608487

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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Brock Mining Inc → Still Run No 1; 1992-09-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Brock Mining Inc → Still Run No 1; 1995-04-01 to 1996-02-02; source msha-controller-operator-history
- **controller_controls_operator:** Brock Mining Inc → Brock Mining Inc; 1995-04-01 to 1996-02-02; source msha-controller-operator-history
- **operator_operates_mine:** Speed Mining Inc → Still Run No 1; 1996-02-03 to 1998-11-12; source msha-controller-operator-history
- **controller_controls_mine:** Chris  Cline → Still Run No 1; 1996-02-03 to 2000-03-14; source msha-controller-operator-history
- **controller_controls_operator:** Chris  Cline → Speed Mining Inc; 1996-02-03 to 1998-11-12; 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; 1998-11-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** K Dale  Tolliver et al → Camp Creek Service Center Ltd; 1998-11-13 to current/open; source msha-controller-operator-history