# Relationship history for MSHA mine 1200355

Current hierarchy: **John  Tiberi → Irving Materials Inc → IMI/McCordsville 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

- **operator_operates_mine:** Irving Materials Inc → IMI/McCordsville Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fred (Pete)  Irving → IMI/McCordsville Quarry; 1950-01-01 to 2005-12-04; source msha-controller-operator-history
- **controller_controls_operator:** Fred (Pete)  Irving → Irving Materials Inc; 1950-01-01 to 2005-12-04; source msha-controller-operator-history
- **controller_controls_mine:** Earl  Brinker et al → IMI/McCordsville Quarry; 2005-12-05 to 2018-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Earl  Brinker et al → Irving Materials Inc; 2005-12-05 to 2018-12-31; source msha-controller-operator-history
- **controller_controls_mine:** John  Tiberi → IMI/McCordsville Quarry; 2019-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Tiberi → Irving Materials Inc; 2019-01-01 to current/open; source msha-controller-operator-history