# Relationship history for MSHA mine 1518182

Current hierarchy: **Horace Garrison  Hill → D & C Mining Corporation → D & C Mining  Corporation**

- 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:** Horace Garrison  Hill → D & C Mining  Corporation; 1995-05-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** D & C Mining Corp → D & C Mining  Corporation; 1999-07-01 to 2000-08-09; source msha-controller-operator-history
- **controller_controls_operator:** Horace Garrison  Hill → D & C Mining Corp; 1999-07-01 to 2000-08-09; source msha-controller-operator-history
- **operator_operates_mine:** B & A Mining Inc → D & C Mining  Corporation; 2000-08-10 to 2001-07-08; source msha-controller-operator-history
- **controller_controls_mine:** Barry  Rogers → D & C Mining  Corporation; 2000-08-10 to 2001-07-08; source msha-controller-operator-history
- **controller_controls_operator:** Barry  Rogers → B & A Mining Inc; 2000-08-10 to 2001-07-08; source msha-controller-operator-history
- **operator_operates_mine:** D & C Mining Corporation → D & C Mining  Corporation; 2001-07-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Horace Garrison  Hill → D & C Mining Corporation; 2001-07-09 to current/open; source msha-controller-operator-history