# Relationship history for MSHA mine 0103645

Current hierarchy: **John Alan  Calvert; John  McNab → County Line Stone LLC → Mine #1**

- 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:** County Line Stone LLC → Mine #1; 2026-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John  McNab et al → Mine #1; 2026-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  McNab et al → County Line Stone LLC; 2026-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John Alan  Calvert et al → County Line Stone LLC; 2026-03-17 to current/open; source msha-controller-operator-history