# Relationship history for MSHA mine 1500257

Current hierarchy: **Fred  Morgenstern; David  Morgenstern → L P Coal Company Inc → #5 Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** L P Coal Co Inc → #5 Mine; 1950-01-01 to 1974-03-01; source msha-controller-operator-history
- **controller_controls_mine:** Branscom Dewey → #5 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Branscom Dewey → L P Coal Co Inc; 1950-01-01 to 1974-03-01; source msha-controller-operator-history
- **operator_operates_mine:** L P Coal Company Inc → #5 Mine; 1974-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fred  Morgenstern et al → #5 Mine; 1974-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fred  Morgenstern et al → L P Coal Company Inc; 1974-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Morgenstern et al → L P Coal Company Inc; 1974-03-02 to current/open; source msha-controller-operator-history