# Relationship history for MSHA mine 5002114

Current hierarchy: **Kate I  Johnson; David T  Johnson → North Fork Mining and Exploration → Blue dog**

- 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

- **operator_operates_mine:** North Fork Mining and Exploration → Blue dog; 2025-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David T  Johnson et al → Blue dog; 2025-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David T  Johnson et al → North Fork Mining and Exploration; 2025-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kate I  Johnson et al → North Fork Mining and Exploration; 2025-01-23 to current/open; source msha-controller-operator-history