# Relationship history for MSHA mine 1202292

Current hierarchy: **Frederick J Ginther → Pmsi Sand & Gravel Inc → PMSI SAND & GRAVEL INC.**

- 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:** Pmsi Sand & Gravel Inc → PMSI SAND & GRAVEL INC.; 2000-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Frederick J Ginther → PMSI SAND & GRAVEL INC.; 2000-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frederick J Ginther → Pmsi Sand & Gravel Inc; 2000-09-01 to current/open; source msha-controller-operator-history