# Relationship history for MSHA mine 4606717

Current hierarchy: **Tovey Charles → Hidden Valley Coal Company Inc → Hazelton Job 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Hidden Valley Coal Company → Hazelton Job Mine; 1983-11-01 to 1987-05-03; source msha-controller-operator-history
- **controller_controls_mine:** Reckart Spencer-Adam Et Al → Hazelton Job Mine; 1983-11-01 to 1987-05-03; source msha-controller-operator-history
- **controller_controls_operator:** Reckart Spencer-Adam Et Al → Hidden Valley Coal Company; 1983-11-01 to 1987-05-03; source msha-controller-operator-history
- **operator_operates_mine:** Hidden Valley Coal Company → Hazelton Job Mine; 1987-05-04 to 1989-01-18; source msha-controller-operator-history
- **controller_controls_mine:** Rumble Michael → Hazelton Job Mine; 1987-05-04 to 1989-01-18; source msha-controller-operator-history
- **controller_controls_operator:** Rumble Michael → Hidden Valley Coal Company; 1987-05-04 to 1989-01-18; source msha-controller-operator-history
- **operator_operates_mine:** Hidden Valley Coal Company Inc → Hazelton Job Mine; 1989-01-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tovey Charles → Hazelton Job Mine; 1989-01-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tovey Charles → Hidden Valley Coal Company Inc; 1989-01-19 to current/open; source msha-controller-operator-history