# Relationship history for MSHA mine 1202154

Current hierarchy: **William J  Critser; Jean A  Critser → Critser Companies Inc → JASPER COUNTY SAND & GRAVEL**

- 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

- **controller_controls_mine:** Jean A  Critser et al → JASPER COUNTY SAND & GRAVEL; 1987-09-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Critser Companies Inc → JASPER COUNTY SAND & GRAVEL; 1994-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jean A  Critser et al → Critser Companies Inc; 1994-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William J  Critser et al → Critser Companies Inc; 1994-02-01 to current/open; source msha-controller-operator-history