# Relationship history for MSHA mine 4703854

Current hierarchy: **Kari Lynn  Michels; David John  Michels → Michels Materials, LLC → Plant 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:** Dave Michels Grading and Trucking LLC → Plant 1; 2019-07-10 to 2020-04-16; source msha-controller-operator-history
- **controller_controls_mine:** David John  Michels et al → Plant 1; 2019-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David John  Michels et al → Dave Michels Grading and Trucking LLC; 2019-07-10 to 2020-04-16; source msha-controller-operator-history
- **controller_controls_operator:** Kari Lynn  Michels et al → Dave Michels Grading and Trucking LLC; 2019-07-10 to 2020-04-16; source msha-controller-operator-history
- **operator_operates_mine:** Michels Materials, LLC → Plant 1; 2020-04-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David John  Michels et al → Plant 1; 2020-04-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David John  Michels et al → Michels Materials, LLC; 2020-04-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kari Lynn  Michels et al → Michels Materials, LLC; 2020-04-17 to current/open; source msha-controller-operator-history