# Relationship history for MSHA mine 4607435

Current hierarchy: **Jack  Slone → Huff Creek Mining Inc → 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:** Powell & Hunt Coal Company Inc → No 1 Mine; 1987-12-01 to 1988-09-15; source msha-controller-operator-history
- **controller_controls_mine:** Powell Herman → No 1 Mine; 1987-12-01 to 1988-09-15; source msha-controller-operator-history
- **controller_controls_operator:** Powell Herman → Powell & Hunt Coal Company Inc; 1987-12-01 to 1988-09-15; source msha-controller-operator-history
- **operator_operates_mine:** Powell & Hunt Coal Company Inc → No 1 Mine; 1988-09-16 to 1989-11-19; source msha-controller-operator-history
- **controller_controls_mine:** Nolen Thomas L → No 1 Mine; 1988-09-16 to 1989-11-19; source msha-controller-operator-history
- **controller_controls_operator:** Nolen Thomas L → Powell & Hunt Coal Company Inc; 1988-09-16 to 1989-11-19; source msha-controller-operator-history
- **operator_operates_mine:** Huff Creek Mining Inc → No 1 Mine; 1989-11-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jack  Slone et al → No 1 Mine; 1989-11-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack  Slone et al → Huff Creek Mining Inc; 1989-11-20 to current/open; source msha-controller-operator-history