# Relationship history for MSHA mine 2102918

Current hierarchy: **Le Mieur Richard → L & K Redi Mix Inc → Portable Crusher**

- 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:** Le Mieur Richard → Portable Crusher; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Brainerd Redi Mix → Portable Crusher; 1983-09-01 to 1992-06-08; source msha-controller-operator-history
- **controller_controls_mine:** Glen  Gutzman → Portable Crusher; 1983-09-01 to 1992-06-08; source msha-controller-operator-history
- **controller_controls_operator:** Glen  Gutzman → Brainerd Redi Mix; 1983-09-01 to 1992-06-08; source msha-controller-operator-history
- **operator_operates_mine:** L & K Redi Mix Inc → Portable Crusher; 1992-06-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Le Mieur Richard → L & K Redi Mix Inc; 1992-06-09 to current/open; source msha-controller-operator-history