# Relationship history for MSHA mine 1512730

Current hierarchy: **Fred  Morgenstern; David  Morgenstern → Co-Op Reserve Corp → No 2 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:** Co-Op Reserve Corp → No 2 Strip; 1981-02-01 to 1983-03-01; source msha-controller-operator-history
- **controller_controls_mine:** David  Morgenstern et al → No 2 Strip; 1981-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Morgenstern et al → Co-Op Reserve Corp; 1981-02-01 to 1983-03-01; source msha-controller-operator-history
- **controller_controls_operator:** Fred  Morgenstern et al → Co-Op Reserve Corp; 1981-02-01 to 1983-03-01; source msha-controller-operator-history
- **controller_controls_mine:** Shackelford Dallas & Moore Clyde W → No 2 Strip; 1983-02-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** White Oak Coal Corp → No 2 Strip; 1983-03-02 to 1983-11-20; source msha-controller-operator-history
- **controller_controls_operator:** Shackelford Dallas & Moore Clyde W → White Oak Coal Corp; 1983-03-02 to 1983-11-20; source msha-controller-operator-history
- **operator_operates_mine:** Co-Op Reserve Corp → No 2 Strip; 1983-11-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Morgenstern et al → Co-Op Reserve Corp; 1983-11-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fred  Morgenstern et al → Co-Op Reserve Corp; 1983-11-21 to current/open; source msha-controller-operator-history