# Relationship history for MSHA mine 1517005

Current hierarchy: **Robert Grover  Hunley → C T & L Coal Company → Auger Mine #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:** Spade Tommy → Auger Mine #1; 1990-08-01 to 2004-05-24; source msha-controller-operator-history
- **operator_operates_mine:** C T & L Coal Inc → Auger Mine #1; 1990-11-01 to 1992-09-09; source msha-controller-operator-history
- **controller_controls_operator:** Spade Tommy → C T & L Coal Inc; 1990-11-01 to 1992-09-09; source msha-controller-operator-history
- **operator_operates_mine:** C T & L Coal Company → Auger Mine #1; 1992-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert Grover  Hunley et al → Auger Mine #1; 1992-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert Grover  Hunley et al → C T & L Coal Company; 1992-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Larry Wayne  Spade → Auger Mine #1; 2004-05-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry Wayne  Spade → C T & L Coal Inc; 2004-05-25 to 1992-09-09; source msha-controller-operator-history