# Relationship history for MSHA mine 2103022

Current hierarchy: **Allen  Stadum; Ronald  Stadum → Stadum Plumbing & Gravel LLP → Portable Crusher No. 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:** Stadum Plumbing & Gravel LLP → Portable Crusher No. 1; 1990-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ronald  Stadum et al → Portable Crusher No. 1; 1990-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald  Stadum et al → Stadum Plumbing & Gravel LLP; 1990-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Allen  Stadum et al → Stadum Plumbing & Gravel LLP; 1990-11-01 to current/open; source msha-controller-operator-history