# Relationship history for MSHA mine 1200840

Current hierarchy: **Fred (Pete)  Irving → IMI Aggregates LLC. → IMI Logansport Stone**

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