# Relationship history for MSHA mine 0203155

Current hierarchy: **Lee  Jolley; Larry  Miller → Sonora Environmental LLC → Sonora Rock & Sand-Coolidge LLC**

- 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:** Sonora Environmental LLC → Sonora Rock & Sand-Coolidge LLC; 2007-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lee  Jolley  et al → Sonora Rock & Sand-Coolidge LLC; 2007-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lee  Jolley  et al → Sonora Environmental LLC; 2007-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Miller  et al → Sonora Environmental LLC; 2007-01-29 to current/open; source msha-controller-operator-history