# Relationship history for MSHA mine 1518852

Current hierarchy: **James L  Griffith → Dags Branch Coal Co., Inc. → No. 7B**

- 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. 7B; 1992-10-19 to 2004-06-30; source msha-controller-operator-history
- **controller_controls_mine:** James L  Griffith → No. 7B; 2004-07-01 to 2014-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Dags Branch Coal Co., Inc. → No. 7B; 2005-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James L  Griffith → Dags Branch Coal Co., Inc.; 2005-03-02 to 2014-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Danny  Justice → Dags Branch Coal Co., Inc.; 2005-03-02 to 2004-06-30; source msha-controller-operator-history
- **controller_controls_mine:** James L  Griffith et al → No. 7B; 2015-01-01 to 2016-05-25; source msha-controller-operator-history
- **controller_controls_operator:** James L  Griffith et al → Dags Branch Coal Co., Inc.; 2015-01-01 to 2016-05-25; source msha-controller-operator-history
- **controller_controls_operator:** Herbert R  Hamilton et al → Dags Branch Coal Co., Inc.; 2015-01-01 to 2016-05-25; source msha-controller-operator-history
- **controller_controls_mine:** James L  Griffith → No. 7B; 2016-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James L  Griffith → Dags Branch Coal Co., Inc.; 2016-05-26 to current/open; source msha-controller-operator-history