# Relationship history for MSHA mine 1518286

Current hierarchy: **Charles R  Brock → C & C Coaliers → Right Fork Job**

- 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:** C & C Coaliers → Right Fork Job; 2000-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles R  Brock → Right Fork Job; 2000-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles R  Brock → C & C Coaliers; 2000-09-01 to current/open; source msha-controller-operator-history