# Relationship history for MSHA mine 1102565

Current hierarchy: **Whewell Albert → Al'S Ready Mix Inc → Mc Queen Mine**

- 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

- **operator_operates_mine:** Curtis Sand & Gravel → Mc Queen Mine; 1950-01-01 to 1979-10-09; source msha-controller-operator-history
- **controller_controls_mine:** Curtis C W & Gary → Mc Queen Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Curtis C W & Gary → Curtis Sand & Gravel; 1950-01-01 to 1979-10-09; source msha-controller-operator-history
- **operator_operates_mine:** Al'S Ready Mix Inc → Mc Queen Mine; 1979-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Whewell Albert → Mc Queen Mine; 1979-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Whewell Albert → Al'S Ready Mix Inc; 1979-10-10 to current/open; source msha-controller-operator-history