# Relationship history for MSHA mine 4400546

Current hierarchy: **Daniels Lloyd → Double Eagle Coal Company Inc → No 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

- **operator_operates_mine:** Fowler & Chaney Coal Company → No 1; 1950-01-01 to 1973-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Fowler F B → No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fowler F B → Fowler & Chaney Coal Company; 1950-01-01 to 1973-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Triple T Coal Company Inc → No 1; 1973-06-01 to 1980-05-20; source msha-controller-operator-history
- **controller_controls_mine:** Ted  Osborne Jr → No 1; 1973-06-01 to 1980-05-20; source msha-controller-operator-history
- **controller_controls_operator:** Ted  Osborne Jr → Triple T Coal Company Inc; 1973-06-01 to 1980-05-20; source msha-controller-operator-history
- **operator_operates_mine:** Double Eagle Coal Company Inc → No 1; 1980-05-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Daniels Lloyd Et Al → No 1; 1980-05-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniels Lloyd Et Al → Double Eagle Coal Company Inc; 1980-05-21 to current/open; source msha-controller-operator-history