# Relationship history for MSHA mine 1102766

Current hierarchy: **Harry  Rimbey → Metro East Sand Inc → Metro East Sand 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:** Metro East Sand & Supply Company → Metro East Sand Inc; 1981-05-01 to 1983-07-11; source msha-controller-operator-history
- **controller_controls_mine:** James  Quirin  et al → Metro East Sand Inc; 1981-05-01 to 1983-07-11; source msha-controller-operator-history
- **controller_controls_operator:** James  Quirin  et al → Metro East Sand & Supply Company; 1981-05-01 to 1983-07-11; source msha-controller-operator-history
- **operator_operates_mine:** Metro East Sand Inc → Metro East Sand Inc; 1983-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Harry  Rimbey et al → Metro East Sand Inc; 1983-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harry  Rimbey et al → Metro East Sand Inc; 1983-07-12 to current/open; source msha-controller-operator-history