# Relationship history for MSHA mine 1202496

Current hierarchy: **Fred (Pete)  Irving → IMI Aggregates LLC. → IMI Logansport Sand & Gravel**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Engineering Aggregates Corp → IMI Logansport Sand & Gravel; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Engineering Aggregates Corporation → IMI Logansport Sand & Gravel; 2019-05-03 to 2025-02-23; source msha-controller-operator-history
- **controller_controls_operator:** Engineering Aggregates Corp → Engineering Aggregates Corporation; 2019-05-03 to 2025-02-23; source msha-controller-operator-history
- **controller_controls_mine:** Fred (Pete)  Irving → IMI Logansport Sand & Gravel; 2020-09-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** IMI Aggregates LLC. → IMI Logansport Sand & Gravel; 2025-02-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fred (Pete)  Irving → IMI Aggregates LLC.; 2025-02-24 to current/open; source msha-controller-operator-history