# Relationship history for MSHA mine 4703896

Current hierarchy: **Rick A  Christiansen; Ryan L  Christiansen; Randy R  Christiansen → R.C. Pavers, LLC. → Portable Plant #2**

- 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:** Randy R  Christiansen  et al → Portable Plant #2; 2003-05-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R.C.Pavers,LLC → Portable Plant #2; 2021-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy R  Christiansen  et al → R.C.Pavers,LLC; 2021-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick A  Christiansen  et al → R.C.Pavers,LLC; 2021-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ryan L  Christiansen  et al → R.C.Pavers,LLC; 2021-05-20 to current/open; source msha-controller-operator-history