# Relationship history for MSHA mine 0405457

Current hierarchy: **Estate of David(Sam) Johnson; Brad  Johnson → Diamond J Corporation → Diamond J Corp**

- 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:** Brad  Johnson  et al → Diamond J Corp; 1996-01-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** California Rock & Asphalt Inc → Diamond J Corp; 2000-09-01 to 2007-06-11; source msha-controller-operator-history
- **controller_controls_operator:** Brad  Johnson  et al → California Rock & Asphalt Inc; 2000-09-01 to 2007-06-11; source msha-controller-operator-history
- **controller_controls_operator:** Estate of David(Sam) Johnson et al → California Rock & Asphalt Inc; 2000-09-01 to 2007-06-11; source msha-controller-operator-history
- **operator_operates_mine:** Diamond J Corporation → Diamond J Corp; 2007-06-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brad  Johnson  et al → Diamond J Corp; 2007-06-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brad  Johnson  et al → Diamond J Corporation; 2007-06-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Estate of David(Sam) Johnson et al → Diamond J Corporation; 2007-06-12 to current/open; source msha-controller-operator-history