# Relationship history for MSHA mine 1518669

Current hierarchy: **Hattie F  Johnson → Spud Mining Inc. → No. 6**

- 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. 6; 1993-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Clark  Johnson → No. 6; 1993-08-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C-C Mining Inc → No. 6; 2003-09-17 to 2004-09-14; source msha-controller-operator-history
- **controller_controls_operator:** Clark  Johnson → C-C Mining Inc; 2003-09-17 to 2004-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Spud Mining Inc. → No. 6; 2004-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hattie F  Johnson → Spud Mining Inc.; 2004-09-15 to current/open; source msha-controller-operator-history