# Relationship history for MSHA mine 1518741

Current hierarchy: **J Mark  Campbell → Apex Energy, Inc. → No. 5**

- 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:** James H  Booth et al → No. 5; 2000-08-11 to 2019-06-15; source msha-controller-operator-history
- **operator_operates_mine:** Apex Energy, Inc. → No. 5; 2004-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James H  Booth et al → Apex Energy, Inc.; 2004-04-05 to 2019-06-15; source msha-controller-operator-history
- **controller_controls_mine:** J Mark  Campbell → No. 5; 2019-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J Mark  Campbell → Apex Energy, Inc.; 2019-06-16 to current/open; source msha-controller-operator-history