# Relationship history for MSHA mine 2102895

Current hierarchy: **Sheila  Maciej → Swanville Redi Mix → Swanville Redi Mix**

- 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:** Swanville Ready Mix Inc → Swanville Redi Mix; 1982-10-01 to 1985-04-23; source msha-controller-operator-history
- **controller_controls_mine:** Mike  Kedrowski → Swanville Redi Mix; 1982-10-01 to 1985-04-23; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Kedrowski → Swanville Ready Mix Inc; 1982-10-01 to 1985-04-23; source msha-controller-operator-history
- **operator_operates_mine:** Swanville Redi Mix → Swanville Redi Mix; 1985-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sheila  Maciej → Swanville Redi Mix; 1985-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sheila  Maciej → Swanville Redi Mix; 1985-04-24 to current/open; source msha-controller-operator-history