# Relationship history for MSHA mine 1101847

Current hierarchy: **Roanoke Concrete Products Company → Peoria Concrete Construction Company → PEORIA CONCRETE CONSTRUCTION CO.**

- 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:** Peoria Concrete Construction Company → PEORIA CONCRETE CONSTRUCTION CO.; 1950-01-01 to 1989-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Aupperle Fred W → PEORIA CONCRETE CONSTRUCTION CO.; 1950-01-01 to 1989-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Aupperle Fred W → Peoria Concrete Construction Company; 1950-01-01 to 1989-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Peoria Concrete Construction Company → PEORIA CONCRETE CONSTRUCTION CO.; 1989-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roanoke Concrete Products Company → PEORIA CONCRETE CONSTRUCTION CO.; 1989-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roanoke Concrete Products Company → Peoria Concrete Construction Company; 1989-05-01 to current/open; source msha-controller-operator-history