# Relationship history for MSHA mine 1511112

Current hierarchy: **Fred  Morgenstern; David  Morgenstern → Transcoal Company → Hyden Coal Shipping**

- 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:** Transcoal Company → Hyden Coal Shipping; 1980-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fred  Morgenstern et al → Hyden Coal Shipping; 1980-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fred  Morgenstern et al → Transcoal Company; 1980-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Morgenstern et al → Transcoal Company; 1980-10-01 to current/open; source msha-controller-operator-history