# Relationship history for MSHA mine 0405189

Current hierarchy: **Heidelberg Materials AG → Hanson Aggregates Pacific Southwest Inc → Inland Rock Plant**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Christi Johnson  Bulot → Inland Rock Plant; 1950-01-01 to 2006-01-10; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Inland Rock Plant; 1987-05-01 to 2007-08-22; source msha-controller-operator-history
- **operator_operates_mine:** Fourth Street Rock Crusher Inc → Inland Rock Plant; 1992-11-01 to 1996-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Christi Johnson  Bulot → Fourth Street Rock Crusher Inc; 1992-11-01 to 1996-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Hanson Aggregates Pacific Southwest Inc → Inland Rock Plant; 1996-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Hanson Aggregates Pacific Southwest Inc; 1996-10-01 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Mitsubishi Corp  et al → Inland Rock Plant; 2006-01-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mitsubishi Corp  et al → Fourth Street Rock Crusher Inc; 2006-01-11 to 1996-09-30; source msha-controller-operator-history
- **controller_controls_operator:** RRM Development Corporation et al → Fourth Street Rock Crusher Inc; 2006-01-11 to 1996-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → Inland Rock Plant; 2007-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Hanson Aggregates Pacific Southwest Inc; 2007-08-23 to current/open; source msha-controller-operator-history