# Relationship history for MSHA mine 0202556

Current hierarchy: **Olivier Rodney & Randy → R & R Cinders Company → Portable #1**

- 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:** R & B Mining & Hauling → Portable #1; 1991-05-01 to 1991-09-02; source msha-controller-operator-history
- **controller_controls_mine:** Olivier Ronald G → Portable #1; 1991-05-01 to 1991-09-02; source msha-controller-operator-history
- **controller_controls_operator:** Olivier Ronald G → R & B Mining & Hauling; 1991-05-01 to 1991-09-02; source msha-controller-operator-history
- **operator_operates_mine:** R & R Cinders Company → Portable #1; 1991-09-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Olivier Rodney & Randy → Portable #1; 1991-09-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Olivier Rodney & Randy → R & R Cinders Company; 1991-09-03 to current/open; source msha-controller-operator-history