# Relationship history for MSHA mine 1518594

Current hierarchy: **George Chris  Waugh → Inner Mountain Mining Inc → #1**

- 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:** Randy  Gilkerson et al → #1; 1992-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Murriell James Ray → #1; 1994-05-09 to 2003-01-16; source msha-controller-operator-history
- **operator_operates_mine:** Murriel-Don Coal Inc. → #1; 2003-01-17 to 2007-03-26; source msha-controller-operator-history
- **controller_controls_mine:** Charles A  Ratliff et al → #1; 2003-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles A  Ratliff et al → Murriel-Don Coal Inc.; 2003-01-17 to 2007-03-26; source msha-controller-operator-history
- **controller_controls_operator:** Rowland  Goble  et al → Murriel-Don Coal Inc.; 2003-01-17 to 2007-03-26; source msha-controller-operator-history
- **controller_controls_operator:** Murriell James Ray → Murriel-Don Coal Inc.; 2003-01-17 to 2003-01-16; source msha-controller-operator-history
- **operator_operates_mine:** Ember Contracting Inc. → #1; 2007-03-27 to 2008-08-14; source msha-controller-operator-history
- **controller_controls_operator:** Randy  Gilkerson et al → Ember Contracting Inc.; 2007-03-27 to 2008-08-14; source msha-controller-operator-history
- **operator_operates_mine:** Inner Mountain Mining Inc → #1; 2008-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** George Chris  Waugh → #1; 2008-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** George Chris  Waugh → Inner Mountain Mining Inc; 2008-08-15 to current/open; source msha-controller-operator-history