# Relationship history for MSHA mine 1517288

Current hierarchy: **Lloyd  Cole; Larry  Hubbard → D + R Coal Inc → No. 4**

- 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:** Troy Lee  Girdner → No. 4; 1984-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Girdner Mining Company Inc → No. 4; 1992-08-01 to 1998-10-13; source msha-controller-operator-history
- **controller_controls_operator:** Troy Lee  Girdner → Girdner Mining Company Inc; 1992-08-01 to 1998-10-13; source msha-controller-operator-history
- **operator_operates_mine:** D & R Coal Inc → No. 4; 1998-10-14 to 2000-08-14; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Hubbard  et al → No. 4; 1998-10-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Hubbard  et al → D & R Coal Inc; 1998-10-14 to 2000-08-14; source msha-controller-operator-history
- **controller_controls_operator:** Lloyd  Cole  et al → D & R Coal Inc; 1998-10-14 to 2000-08-14; source msha-controller-operator-history
- **operator_operates_mine:** Girdner Mining Company Inc → No. 4; 2000-08-15 to 2002-07-16; source msha-controller-operator-history
- **controller_controls_operator:** Troy Lee  Girdner → Girdner Mining Company Inc; 2000-08-15 to 2002-07-16; source msha-controller-operator-history
- **operator_operates_mine:** Myjoy Coal LLC → No. 4; 2002-07-17 to 2011-10-04; source msha-controller-operator-history
- **controller_controls_mine:** Rhonda  Duerr → No. 4; 2002-07-17 to 2006-04-17; source msha-controller-operator-history
- **controller_controls_operator:** Rhonda  Duerr → Myjoy Coal LLC; 2002-07-17 to 2006-04-17; source msha-controller-operator-history
- **controller_controls_mine:** Troy Lee  Girdner → No. 4; 2006-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Troy Lee  Girdner → Myjoy Coal LLC; 2006-04-18 to 2011-10-04; source msha-controller-operator-history
- **operator_operates_mine:** D + R Coal Inc → No. 4; 2011-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lloyd  Cole  et al → D + R Coal Inc; 2011-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Hubbard  et al → D + R Coal Inc; 2011-10-05 to current/open; source msha-controller-operator-history