# Relationship history for MSHA mine 4003296

Current hierarchy: **Robert C  Gregory Jr → Dixie Carbon, Inc. → Rosevelt Tipple**

- 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

- **operator_operates_mine:** Triple H Coal, LLC → Rosevelt Tipple; 2007-05-29 to 2016-01-10; source msha-controller-operator-history
- **controller_controls_mine:** Bert D  Hatmaker → Rosevelt Tipple; 2007-05-29 to 2013-03-24; source msha-controller-operator-history
- **controller_controls_operator:** Bert D  Hatmaker → Triple H Coal, LLC; 2007-05-29 to 2013-03-24; source msha-controller-operator-history
- **controller_controls_mine:** William  Yeh → Rosevelt Tipple; 2013-03-25 to 2015-03-11; source msha-controller-operator-history
- **controller_controls_operator:** William  Yeh → Triple H Coal, LLC; 2013-03-25 to 2015-03-11; source msha-controller-operator-history
- **controller_controls_mine:** Bert D  Hatmaker → Rosevelt Tipple; 2015-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bert D  Hatmaker → Triple H Coal, LLC; 2015-03-12 to 2016-01-10; source msha-controller-operator-history
- **operator_operates_mine:** Dixie Carbon, Inc. → Rosevelt Tipple; 2016-01-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert C  Gregory Jr → Rosevelt Tipple; 2016-01-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert C  Gregory Jr → Dixie Carbon, Inc.; 2016-01-11 to current/open; source msha-controller-operator-history