# Relationship history for MSHA mine 1517633

Current hierarchy: **Stanley W Osborne → Sister Bear Mining Inc → No 6**

- 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:** Danny  Justice → No 6; 1992-10-19 to 2004-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Tadd Coal Inc → No 6; 1994-12-01 to 1995-07-24; source msha-controller-operator-history
- **controller_controls_mine:** Danny  Blankenship → No 6; 1994-12-01 to 1995-07-24; source msha-controller-operator-history
- **controller_controls_operator:** Danny  Blankenship → Tadd Coal Inc; 1994-12-01 to 1995-07-24; source msha-controller-operator-history
- **controller_controls_mine:** Henry  Lyon → No 6; 1995-07-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Letcher County Coal Inc → No 6; 1995-07-25 to 1996-04-05; source msha-controller-operator-history
- **controller_controls_operator:** Henry  Lyon → Letcher County Coal Inc; 1995-07-25 to 1996-04-05; source msha-controller-operator-history
- **operator_operates_mine:** Dove Coal Inc → No 6; 1996-04-06 to 1996-10-23; source msha-controller-operator-history
- **controller_controls_mine:** Joyce B  Kretzer → No 6; 1996-04-06 to 1996-10-23; source msha-controller-operator-history
- **controller_controls_operator:** Joyce B  Kretzer → Dove Coal Inc; 1996-04-06 to 1996-10-23; source msha-controller-operator-history
- **controller_controls_mine:** Stanley W Osborne → No 6; 1996-09-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dove Coal Inc → No 6; 1996-10-24 to 1997-02-27; source msha-controller-operator-history
- **controller_controls_mine:** Henry  Lyon → No 6; 1996-10-24 to 1997-02-27; source msha-controller-operator-history
- **controller_controls_operator:** Henry  Lyon → Dove Coal Inc; 1996-10-24 to 1997-02-27; source msha-controller-operator-history
- **operator_operates_mine:** Dags Branch Coal Company Inc → No 6; 1997-02-28 to 1999-10-24; source msha-controller-operator-history
- **controller_controls_operator:** Danny  Justice → Dags Branch Coal Company Inc; 1997-02-28 to 1999-10-24; source msha-controller-operator-history
- **operator_operates_mine:** Sister Bear Mining Inc → No 6; 1999-10-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stanley W Osborne → Sister Bear Mining Inc; 1999-10-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James L  Griffith → No 6; 2004-07-01 to 2014-12-31; source msha-controller-operator-history
- **controller_controls_operator:** James L  Griffith → Dags Branch Coal Company Inc; 2004-07-01 to 1999-10-24; source msha-controller-operator-history
- **controller_controls_mine:** Herbert R  Hamilton et al → No 6; 2015-01-01 to 2016-05-25; source msha-controller-operator-history
- **controller_controls_operator:** Herbert R  Hamilton et al → Dags Branch Coal Company Inc; 2015-01-01 to 1999-10-24; source msha-controller-operator-history
- **controller_controls_operator:** James L  Griffith et al → Dags Branch Coal Company Inc; 2015-01-01 to 1999-10-24; source msha-controller-operator-history
- **controller_controls_mine:** James L  Griffith → No 6; 2016-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James L  Griffith → Dags Branch Coal Company Inc; 2016-05-26 to 1999-10-24; source msha-controller-operator-history