# Relationship history for MSHA mine 3300984

Current hierarchy: **Teramana Anthony J → T & T Coal Company → T & T #23 (Tipple Only)**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** T & T Coal Company → T & T #23 (Tipple Only); 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Teramana Anthony J Et Al → T & T #23 (Tipple Only); 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Teramana Anthony J Et Al → T & T Coal Company; 1950-01-01 to current/open; source msha-controller-operator-history