# Relationship history for MSHA mine 4104996

Current hierarchy: **Pedro Ivan  Delgado → Rio Materials LLC → Plum Aggregate Operating Company**

- 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:** Plum Aggregate Operating Co. LLC → Plum Aggregate Operating Company; 2013-01-17 to 2018-01-08; source msha-controller-operator-history
- **controller_controls_mine:** Matthew  Diehl et al → Plum Aggregate Operating Company; 2013-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew  Diehl et al → Plum Aggregate Operating Co. LLC; 2013-01-17 to 2018-01-08; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Brunson et al → Plum Aggregate Operating Co. LLC; 2013-01-17 to 2018-01-08; source msha-controller-operator-history
- **controller_controls_mine:** Pedro Ivan  Delgado → Plum Aggregate Operating Company; 2015-10-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rio Materials LLC → Plum Aggregate Operating Company; 2018-01-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pedro Ivan  Delgado → Rio Materials LLC; 2018-01-09 to current/open; source msha-controller-operator-history