# Relationship history for MSHA mine 4605509

Current hierarchy: **D L (Jack)  Bowling → El-Bow Mining Inc → Lick Branch No 1 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

- **operator_operates_mine:** Ck Inc → Lick Branch No 1 Mine; 1977-04-01 to 1979-10-14; source msha-controller-operator-history
- **controller_controls_mine:** Curry Sonny H → Lick Branch No 1 Mine; 1977-04-01 to 1979-10-14; source msha-controller-operator-history
- **controller_controls_operator:** Curry Sonny H → Ck Inc; 1977-04-01 to 1979-10-14; source msha-controller-operator-history
- **operator_operates_mine:** El-Bow Mining Inc → Lick Branch No 1 Mine; 1979-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** D L (Jack)  Bowling → Lick Branch No 1 Mine; 1979-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** D L (Jack)  Bowling → El-Bow Mining Inc; 1979-10-15 to current/open; source msha-controller-operator-history