# Relationship history for MSHA mine 4703908

Current hierarchy: **Joshua R  Radant; Richard P  Lamers; Jeffrey M  Maples → Badgerland Aggregates LLC → Masaba 6x20 Wash Plant SN#2016139**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Richard P  Lamers et al → Masaba 6x20 Wash Plant SN#2016139; 2015-01-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Badgerland Aggregates LLC → Masaba 6x20 Wash Plant SN#2016139; 2021-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard P  Lamers et al → Badgerland Aggregates LLC; 2021-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joshua R  Radant et al → Badgerland Aggregates LLC; 2021-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey M  Maples et al → Badgerland Aggregates LLC; 2021-08-16 to current/open; source msha-controller-operator-history