# Relationship history for MSHA mine 1900567

Current hierarchy: **James  Chenier; John B Chenier → CHENIER'S GRAVEL BANK INC → CHENIER'S GRAVEL BANK 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Chenier's Gravel Bank Inc → CHENIER'S GRAVEL BANK INC; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lawrence L  Chenier → CHENIER'S GRAVEL BANK INC; 1950-01-01 to 2015-09-09; source msha-controller-operator-history
- **controller_controls_operator:** Lawrence L  Chenier → Chenier's Gravel Bank Inc; 1950-01-01 to 2015-09-09; source msha-controller-operator-history
- **controller_controls_mine:** John B Chenier et al → CHENIER'S GRAVEL BANK INC; 2015-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John B Chenier et al → Chenier's Gravel Bank Inc; 2015-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Chenier et al → Chenier's Gravel Bank Inc; 2015-09-10 to current/open; source msha-controller-operator-history