# Relationship history for MSHA mine 4404313

Current hierarchy: **James C  Ball → H J & K Coal Company → 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

- **controller_controls_mine:** James C  Ball → No 1 Mine; 1975-09-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Peggy-O Coal Company Inc → No 1 Mine; 1976-01-01 to 1977-11-30; source msha-controller-operator-history
- **controller_controls_operator:** James C  Ball → Peggy-O Coal Company Inc; 1976-01-01 to 1977-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Lester & Boyd Coal Company → No 1 Mine; 1977-12-01 to 1978-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Lester Floyd L & Daniel Lee Boyd → No 1 Mine; 1977-12-01 to 1978-01-02; source msha-controller-operator-history
- **controller_controls_operator:** Lester Floyd L & Daniel Lee Boyd → Lester & Boyd Coal Company; 1977-12-01 to 1978-01-02; source msha-controller-operator-history
- **operator_operates_mine:** H J & K Coal Company → No 1 Mine; 1978-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James C  Ball → No 1 Mine; 1978-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James C  Ball → H J & K Coal Company; 1978-01-03 to current/open; source msha-controller-operator-history