# Relationship history for MSHA mine 0101734

Current hierarchy: **Clark Bob → C B N Coal Company Inc → Hillard Strip**

- 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 B N Coal Company Inc → Hillard Strip; 1977-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Clark Bob → Hillard Strip; 1977-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clark Bob → C B N Coal Company Inc; 1977-05-01 to current/open; source msha-controller-operator-history