# Relationship history for MSHA mine 2402183

Current hierarchy: **Rick  Miller; Sally  Miller → Green Mountain Construction → CRUSHER 300**

- 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:** Green Mountain Construction → CRUSHER 300; 1999-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rick  Miller  et al → CRUSHER 300; 1999-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick  Miller  et al → Green Mountain Construction; 1999-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sally  Miller  et al → Green Mountain Construction; 1999-10-01 to current/open; source msha-controller-operator-history