# Relationship history for MSHA mine 4801885

Current hierarchy: **Joshua  Payne; Joseph  Cammans; Kent  Payne → Black Mesa Advanced Fission → Kendall Gravel Pit**

- 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

- **operator_operates_mine:** Black Mesa Advanced Fission → Kendall Gravel Pit; 2024-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kent  Payne et al → Kendall Gravel Pit; 2024-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kent  Payne et al → Black Mesa Advanced Fission; 2024-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joshua  Payne et al → Black Mesa Advanced Fission; 2024-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Cammans et al → Black Mesa Advanced Fission; 2024-07-31 to current/open; source msha-controller-operator-history