# Relationship history for MSHA mine 0402815

Current hierarchy: **RRM Development Corporation; Mitsubishi Corp → Robertson's → Banning**

- 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:** Beckham Brothers Ready Mix → Banning; 1950-01-01 to 1991-01-29; source msha-controller-operator-history
- **controller_controls_mine:** Matich Corp → Banning; 1950-01-01 to 1991-01-29; source msha-controller-operator-history
- **controller_controls_operator:** Matich Corp → Beckham Brothers Ready Mix; 1950-01-01 to 1991-01-29; source msha-controller-operator-history
- **controller_controls_mine:** Thomas L  Daniel → Banning; 1950-01-01 to 1998-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Beaumont Concrete Company → Banning; 1991-01-30 to 1998-11-30; source msha-controller-operator-history
- **controller_controls_operator:** Thomas L  Daniel → Beaumont Concrete Company; 1991-01-30 to 1998-11-30; source msha-controller-operator-history
- **controller_controls_mine:** RRM Development Corporation et al → Banning; 1995-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Robertson's → Banning; 1998-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** RRM Development Corporation et al → Robertson's; 1998-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mitsubishi Corp  et al → Robertson's; 1998-12-01 to current/open; source msha-controller-operator-history