# Relationship history for MSHA mine 4608704

Current hierarchy: **James H  Booth → Argus Energy WV LLC → Copley Trace Surface Mine**

- 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:** Pen Holdings Inc → Copley Trace Surface Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pen Coal Corp → Copley Trace Surface Mine; 1998-03-01 to 2002-12-19; source msha-controller-operator-history
- **controller_controls_operator:** Pen Holdings Inc → Pen Coal Corp; 1998-03-01 to 2002-12-19; source msha-controller-operator-history
- **operator_operates_mine:** Argus Energy WV LLC → Copley Trace Surface Mine; 2002-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James H  Booth et al → Copley Trace Surface Mine; 2002-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James H  Booth et al → Argus Energy WV LLC; 2002-12-20 to current/open; source msha-controller-operator-history