# Relationship history for MSHA mine 1510349

Current hierarchy: **Coleman Terry → Teresa Coal Company Inc → No 2 Mine (D)**

- 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:** Walters Lacy L → No 2 Mine (D); 1976-11-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Teresa Coal Company Inc → No 2 Mine (D); 1977-04-01 to 1980-08-12; source msha-controller-operator-history
- **controller_controls_operator:** Walters Lacy L → Teresa Coal Company Inc; 1977-04-01 to 1980-08-12; source msha-controller-operator-history
- **operator_operates_mine:** Teresa Coal Company Inc → No 2 Mine (D); 1980-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Coleman Terry → No 2 Mine (D); 1980-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Coleman Terry → Teresa Coal Company Inc; 1980-08-13 to current/open; source msha-controller-operator-history