# Relationship history for MSHA mine 4607980

Current hierarchy: **James  Taylor; Coy  Taylor → C J & L Mining Inc → Mine No 6**

- 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:** Justus Ruby Helen → Mine No 6; 1988-08-01 to 1994-04-25; source msha-controller-operator-history
- **operator_operates_mine:** Ruby Helen Coal Company Inc → Mine No 6; 1990-09-01 to 1994-04-25; source msha-controller-operator-history
- **controller_controls_operator:** Justus Ruby Helen → Ruby Helen Coal Company Inc; 1990-09-01 to 1994-04-25; source msha-controller-operator-history
- **operator_operates_mine:** Buckeye Coal Company Inc → Mine No 6; 1994-04-26 to 2001-03-11; source msha-controller-operator-history
- **controller_controls_mine:** David  Clevinger et al → Mine No 6; 1994-04-26 to 2001-03-11; source msha-controller-operator-history
- **controller_controls_operator:** David  Clevinger et al → Buckeye Coal Company Inc; 1994-04-26 to 2001-03-11; source msha-controller-operator-history
- **controller_controls_mine:** James  Taylor et al → Mine No 6; 1995-06-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C J & L Mining Inc → Mine No 6; 2001-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Taylor et al → C J & L Mining Inc; 2001-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Coy  Taylor et al → C J & L Mining Inc; 2001-03-12 to current/open; source msha-controller-operator-history