# Relationship history for MSHA mine 1200017

Current hierarchy: **Fred (Pete)  Irving → IMI Aggregates LLC → IMI Corydon Stone & Asphalt 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

- **controller_controls_mine:** Fred (Pete)  Irving → IMI Corydon Stone & Asphalt Co.; 1950-01-01 to 2005-12-04; source msha-controller-operator-history
- **operator_operates_mine:** Corydon Stone & Asphalt Co. → IMI Corydon Stone & Asphalt Co.; 1950-01-01 to 2014-06-08; source msha-controller-operator-history
- **controller_controls_mine:** Michael J Gohnmann  et al → IMI Corydon Stone & Asphalt Co.; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael J Gohnmann  et al → Corydon Stone & Asphalt Co.; 1950-01-01 to 2014-06-08; source msha-controller-operator-history
- **controller_controls_mine:** Earl  Brinker et al → IMI Corydon Stone & Asphalt Co.; 2005-12-05 to 2018-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Irving Materials, Inc. → IMI Corydon Stone & Asphalt Co.; 2014-06-09 to 2020-09-07; source msha-controller-operator-history
- **controller_controls_operator:** Earl  Brinker et al → Irving Materials, Inc.; 2014-06-09 to 2018-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Fred (Pete)  Irving → Irving Materials, Inc.; 2014-06-09 to 2005-12-04; source msha-controller-operator-history
- **controller_controls_mine:** John  Tiberi → IMI Corydon Stone & Asphalt Co.; 2019-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Tiberi → Irving Materials, Inc.; 2019-01-01 to 2020-09-07; source msha-controller-operator-history
- **operator_operates_mine:** IMI Aggregates LLC → IMI Corydon Stone & Asphalt Co.; 2020-09-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fred (Pete)  Irving → IMI Corydon Stone & Asphalt Co.; 2020-09-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fred (Pete)  Irving → IMI Aggregates LLC; 2020-09-08 to current/open; source msha-controller-operator-history