# Relationship history for MSHA mine 1517951

Current hierarchy: **Jack H Ealy; Ralph  Napier; John D North   -  JackrockLLC only8/27/99-5/ → Jackrock Llc → Jackrock No 1**

- 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:** Gary  Asher → Jackrock No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stanley R  Ditty → Jackrock No 1; 1989-10-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Del Rio Inc → Jackrock No 1; 1997-06-01 to 1999-04-12; source msha-controller-operator-history
- **controller_controls_operator:** Stanley R  Ditty → Del Rio Inc; 1997-06-01 to 1999-04-12; source msha-controller-operator-history
- **operator_operates_mine:** Appolo Fuels Inc → Jackrock No 1; 1999-04-13 to 1999-08-26; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Asher → Appolo Fuels Inc; 1999-04-13 to 1999-08-26; source msha-controller-operator-history
- **operator_operates_mine:** Jackrock Llc → Jackrock No 1; 1999-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John D North et al -  JackrockLLC only8/27/99-5/3/04 → Jackrock No 1; 1999-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John D North et al -  JackrockLLC only8/27/99-5/3/04 → Jackrock Llc; 1999-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack H Ealy et al → Jackrock Llc; 1999-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ralph  Napier et al → Jackrock Llc; 1999-08-27 to current/open; source msha-controller-operator-history