# Relationship history for MSHA mine 1512732

Current hierarchy: **Lee  Conway; Larry  Conway → Conway Coal Company → Conway Strip**

- 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:** Conway Coal Company → Conway Strip; 1981-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Conway et al → Conway Strip; 1981-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Conway et al → Conway Coal Company; 1981-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lee  Conway et al → Conway Coal Company; 1981-01-01 to current/open; source msha-controller-operator-history