# Relationship history for MSHA mine 1103233

Current hierarchy: **VOTORANTIM CIMENTOS → VCNA Prairie LLC → Ifft Quarry**

- 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

- **controller_controls_mine:** Richard F  Hatzer → Ifft Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** VOTORANTIM CIMENTOS → Ifft Quarry; 2008-02-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Valley View Industries, Inc. → Ifft Quarry; 2010-11-06 to 2021-08-09; source msha-controller-operator-history
- **controller_controls_operator:** Richard F  Hatzer → Valley View Industries, Inc.; 2010-11-06 to 2021-08-09; source msha-controller-operator-history
- **operator_operates_mine:** VCNA Prairie LLC → Ifft Quarry; 2021-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** VOTORANTIM CIMENTOS → VCNA Prairie LLC; 2021-08-10 to current/open; source msha-controller-operator-history