# Relationship history for MSHA mine 1514051

Current hierarchy: **Lang Theo O → Lancaster Mining 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

- **controller_controls_mine:** King Thomas → No 1; 1983-01-26 to 1983-10-05; source msha-controller-operator-history
- **operator_operates_mine:** Tri-Circle Energy → No 1; 1983-05-01 to 1983-06-26; source msha-controller-operator-history
- **controller_controls_operator:** King Thomas → Tri-Circle Energy; 1983-05-01 to 1983-06-26; source msha-controller-operator-history
- **operator_operates_mine:** Lancaster Mining Company Inc → No 1; 1983-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lang Theo O → No 1; 1983-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lang Theo O → Lancaster Mining Company Inc; 1983-06-27 to current/open; source msha-controller-operator-history