# Relationship history for MSHA mine 4608489

Current hierarchy: **Terry  Cline → Cline Excavation Corp → No 54 Mine (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:** Cline Ray → No 54 Mine (1); 1994-02-14 to 1995-10-09; source msha-controller-operator-history
- **operator_operates_mine:** R C Mining Corp → No 54 Mine (1); 1995-04-01 to 1995-10-09; source msha-controller-operator-history
- **controller_controls_operator:** Cline Ray → R C Mining Corp; 1995-04-01 to 1995-10-09; source msha-controller-operator-history
- **operator_operates_mine:** Cline Excavation Corp → No 54 Mine (1); 1995-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Terry  Cline → No 54 Mine (1); 1995-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry  Cline → Cline Excavation Corp; 1995-10-10 to current/open; source msha-controller-operator-history