# Relationship history for MSHA mine 2103933

Current hierarchy: **Joleen  Niles → JJD Companies LLC → Crusher 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Steele County Construction Companies LLC → Crusher 1; 2018-06-19 to 2020-06-02; source msha-controller-operator-history
- **controller_controls_mine:** Dave W Arndt → Crusher 1; 2018-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dave W Arndt → Steele County Construction Companies LLC; 2018-06-19 to 2020-06-02; source msha-controller-operator-history
- **controller_controls_mine:** Joleen  Niles → Crusher 1; 2020-04-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** JJD Companies LLC → Crusher 1; 2020-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joleen  Niles → JJD Companies LLC; 2020-06-03 to current/open; source msha-controller-operator-history