# Relationship history for MSHA mine 3503435

Current hierarchy: **Rebecca  Rundell; Robert  Rundell → RR Aggregate, LLC → 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:** Martin Creek Quarry Inc → Portable 1; 1997-02-01 to 2020-03-01; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Mullins → Portable 1; 1997-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Mullins → Martin Creek Quarry Inc; 1997-02-01 to 2020-03-01; source msha-controller-operator-history
- **operator_operates_mine:** RR Aggregate, LLC → Portable 1; 2020-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Rundell et al → Portable 1; 2020-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Rundell et al → RR Aggregate, LLC; 2020-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rebecca  Rundell et al → RR Aggregate, LLC; 2020-03-02 to current/open; source msha-controller-operator-history