# Relationship history for MSHA mine 1519690

Current hierarchy: **Martha J  Smith; James W  Smith → Genesis Group, LLC → #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:** Genesis Group, LLC → #1; 2012-12-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James W  Smith et al → #1; 2012-12-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James W  Smith et al → Genesis Group, LLC; 2012-12-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martha J  Smith et al → Genesis Group, LLC; 2012-12-18 to current/open; source msha-controller-operator-history