# Relationship history for MSHA mine 4602490

Current hierarchy: **Daniel S  Jordan → Tree Top Energy Inc → #2**

- 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

- **operator_operates_mine:** Debbie Coal Company → #2; 1950-01-01 to 1998-08-04; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Day → #2; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Day → Debbie Coal Company; 1950-01-01 to 1998-08-04; source msha-controller-operator-history
- **controller_controls_mine:** Herbert  Billings → #2; 1997-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tree Top Energy Inc → #2; 1998-08-05 to 1999-10-03; source msha-controller-operator-history
- **controller_controls_operator:** Herbert  Billings → Tree Top Energy Inc; 1998-08-05 to 1999-10-03; source msha-controller-operator-history
- **operator_operates_mine:** Tree Top Energy Inc → #2; 1999-10-04 to 2001-03-11; source msha-controller-operator-history
- **controller_controls_mine:** James  VanDyke → #2; 1999-10-04 to 2001-03-11; source msha-controller-operator-history
- **controller_controls_operator:** James  VanDyke → Tree Top Energy Inc; 1999-10-04 to 2001-03-11; source msha-controller-operator-history
- **operator_operates_mine:** Tree Top Energy Inc → #2; 2001-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Daniel S  Jordan → #2; 2001-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel S  Jordan → Tree Top Energy Inc; 2001-03-12 to current/open; source msha-controller-operator-history