# Relationship history for MSHA mine 1513212

Current hierarchy: **Fred  Morgenstern; David  Morgenstern → Co-Op Reserve Corp → No 1 Surface**

- 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

- **controller_controls_mine:** Fred  Morgenstern et al → No 1 Surface; 1981-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Silver Tip Mining Company Inc → No 1 Surface; 1981-11-01 to 1982-06-08; source msha-controller-operator-history
- **controller_controls_mine:** Peace Roger → No 1 Surface; 1981-11-01 to 1982-06-08; source msha-controller-operator-history
- **controller_controls_operator:** Peace Roger → Silver Tip Mining Company Inc; 1981-11-01 to 1982-06-08; source msha-controller-operator-history
- **operator_operates_mine:** Co-Op Reserve Corp → No 1 Surface; 1982-06-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fred  Morgenstern et al → Co-Op Reserve Corp; 1982-06-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Morgenstern et al → Co-Op Reserve Corp; 1982-06-09 to current/open; source msha-controller-operator-history