# Relationship history for MSHA mine 1510563

Current hierarchy: **Jessica R  Lester → Lester Coal Company Inc → No 1 Mine (C)**

- 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:** Preece Homer & George → No 1 Mine (C); 1977-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Preece Enterprises Inc → No 1 Mine (C); 1977-07-01 to 1979-07-22; source msha-controller-operator-history
- **controller_controls_operator:** Preece Homer & George → Preece Enterprises Inc; 1977-07-01 to 1979-07-22; source msha-controller-operator-history
- **operator_operates_mine:** D & L Coal Company → No 1 Mine (C); 1979-07-23 to 1981-01-22; source msha-controller-operator-history
- **controller_controls_mine:** Chafins Larry & Dennis → No 1 Mine (C); 1979-07-23 to 1981-01-22; source msha-controller-operator-history
- **controller_controls_operator:** Chafins Larry & Dennis → D & L Coal Company; 1979-07-23 to 1981-01-22; source msha-controller-operator-history
- **controller_controls_mine:** Burgess David → No 1 Mine (C); 1981-01-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** L M B River Coal Company Inc → No 1 Mine (C); 1981-01-23 to 1982-02-18; source msha-controller-operator-history
- **controller_controls_operator:** Burgess David → L M B River Coal Company Inc; 1981-01-23 to 1982-02-18; source msha-controller-operator-history
- **operator_operates_mine:** Lester Coal Company Inc → No 1 Mine (C); 1982-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jessica R  Lester et al → No 1 Mine (C); 1982-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jessica R  Lester et al → Lester Coal Company Inc; 1982-02-19 to current/open; source msha-controller-operator-history