# Relationship history for MSHA mine 0101768

Current hierarchy: **Solomon C Leroy → Blackjack Mining Company Inc → Christian Mine**

- 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:** Solomon C Leroy → Christian Mine; 1977-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Blackjack Mining Company Inc → Christian Mine; 1977-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Solomon C Leroy → Blackjack Mining Company Inc; 1977-08-01 to current/open; source msha-controller-operator-history