# Relationship history for MSHA mine 1517266

Current hierarchy: **Henry  Chaney Jr → Cheyenne Elkhorn Coal Co Inc → #10**

- 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:** Henry  Chaney Jr → #10; 1976-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Big Bear Coal Company Inc → #10; 1992-07-01 to 1992-10-28; source msha-controller-operator-history
- **controller_controls_mine:** Matney William H → #10; 1992-07-01 to 1992-10-28; source msha-controller-operator-history
- **controller_controls_operator:** Matney William H → Big Bear Coal Company Inc; 1992-07-01 to 1992-10-28; source msha-controller-operator-history
- **operator_operates_mine:** Chloe Elkhorn Inc → #10; 1992-10-29 to 2004-10-06; source msha-controller-operator-history
- **controller_controls_mine:** Ronnie  Thacker et al → #10; 1992-10-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronnie  Thacker et al → Chloe Elkhorn Inc; 1992-10-29 to 2004-10-06; source msha-controller-operator-history
- **controller_controls_operator:** Freddy  Thacker et al → Chloe Elkhorn Inc; 1992-10-29 to 2004-10-06; source msha-controller-operator-history
- **operator_operates_mine:** Ivy Fork Mining LLC → #10; 2004-10-07 to 2006-01-08; source msha-controller-operator-history
- **controller_controls_mine:** Eddie  Lawson → #10; 2004-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eddie  Lawson → Ivy Fork Mining LLC; 2004-10-07 to 2006-01-08; source msha-controller-operator-history
- **controller_controls_mine:** Josh  Osborne → #10; 2004-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joey  Taylor → #10; 2005-01-18 to 2006-11-20; source msha-controller-operator-history
- **operator_operates_mine:** Midgard Mining Company LLC → #10; 2006-01-09 to 2006-11-20; source msha-controller-operator-history
- **controller_controls_operator:** Josh  Osborne → Midgard Mining Company LLC; 2006-01-09 to 2006-11-20; source msha-controller-operator-history
- **operator_operates_mine:** L & E Contracting Inc → #10; 2006-11-21 to 2007-05-01; source msha-controller-operator-history
- **controller_controls_mine:** Bradley B  Hopkins → #10; 2006-11-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bradley B  Hopkins → L & E Contracting Inc; 2006-11-21 to 2007-05-01; source msha-controller-operator-history
- **controller_controls_operator:** Joey  Taylor → L & E Contracting Inc; 2006-11-21 to 2006-11-20; source msha-controller-operator-history
- **operator_operates_mine:** Cheyenne Elkhorn Coal Co Inc → #10; 2007-05-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Henry  Chaney Jr → Cheyenne Elkhorn Coal Co Inc; 2007-05-02 to current/open; source msha-controller-operator-history