# Relationship history for MSHA mine 4608437

Current hierarchy: **James Roy  Lucas → Point Mining Inc → Campbells Creek No 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Richard H  Abraham et al → Campbells Creek No 4; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James Roy  Lucas → Campbells Creek No 4; 1992-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Talon Resources Inc → Campbells Creek No 4; 1994-09-01 to 1997-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Richard H  Abraham et al → Talon Resources Inc; 1994-09-01 to 1997-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Point Mining Inc → Campbells Creek No 4; 1997-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James Roy  Lucas → Point Mining Inc; 1997-03-01 to current/open; source msha-controller-operator-history