# Relationship history for MSHA mine 4001693

Current hierarchy: **Jolly Charles → Jolly Tree Service Company → No 1 Surface**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** B C C Inc → No 1 Surface; 1974-11-21 to 1975-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Bachelier Cliff → No 1 Surface; 1974-11-21 to 1975-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Bachelier Cliff → B C C Inc; 1974-11-21 to 1975-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Jolly Tree Service Company → No 1 Surface; 1975-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jolly Charles → No 1 Surface; 1975-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jolly Charles → Jolly Tree Service Company; 1975-05-01 to current/open; source msha-controller-operator-history