# Relationship history for MSHA mine 1518706

Current hierarchy: **Hattie F  Johnson → Spud Mining, Inc. → No.  7**

- 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:** Hattie F  Johnson → No.  7; 1993-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Carl  Kirk et al → No.  7; 2000-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tommy L  McKenzie et al → No.  7; 2002-02-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Marshall Mining Inc → No.  7; 2004-01-23 to 2004-11-07; source msha-controller-operator-history
- **controller_controls_operator:** Carl  Kirk et al → Marshall Mining Inc; 2004-01-23 to 2004-11-07; source msha-controller-operator-history
- **operator_operates_mine:** R & T Coal Co. Inc. → No.  7; 2004-11-08 to 2005-07-12; source msha-controller-operator-history
- **controller_controls_operator:** Tommy L  McKenzie et al → R & T Coal Co. Inc.; 2004-11-08 to 2005-07-12; source msha-controller-operator-history
- **controller_controls_operator:** Russell J  Honeycutt et al → R & T Coal Co. Inc.; 2004-11-08 to 2005-07-12; source msha-controller-operator-history
- **operator_operates_mine:** Spud Mining, Inc. → No.  7; 2005-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hattie F  Johnson → Spud Mining, Inc.; 2005-07-13 to current/open; source msha-controller-operator-history