# Relationship history for MSHA mine 1518235

Current hierarchy: **James River Coal Company → Bell County Coal Corporation → Hignite #4**

- 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

- **controller_controls_mine:** James River Coal Company → Hignite #4; 1988-09-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ralph  Napier et al → Hignite #4; 1999-08-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bell County Coal Corporation → Hignite #4; 2000-02-01 to 2001-02-11; source msha-controller-operator-history
- **controller_controls_operator:** James River Coal Company → Bell County Coal Corporation; 2000-02-01 to 2001-02-11; source msha-controller-operator-history
- **operator_operates_mine:** Jackrock Llc → Hignite #4; 2001-02-12 to 2001-04-22; source msha-controller-operator-history
- **controller_controls_operator:** Ralph  Napier et al → Jackrock Llc; 2001-02-12 to 2001-04-22; source msha-controller-operator-history
- **controller_controls_operator:** Jack H Ealy et al → Jackrock Llc; 2001-02-12 to 2001-04-22; source msha-controller-operator-history
- **controller_controls_operator:** John D North et al -  JackrockLLC only8/27/99-5/3/04 → Jackrock Llc; 2001-02-12 to 2001-04-22; source msha-controller-operator-history
- **operator_operates_mine:** Bell County Coal Corporation → Hignite #4; 2001-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James River Coal Company → Bell County Coal Corporation; 2001-04-23 to current/open; source msha-controller-operator-history