# Relationship history for MSHA mine 1202020

Current hierarchy: **Hostetler Ronald → Hostetler Lawn & Landscaping Inc → HOSTETLER LAWN & LANDSCAPING, I**

- 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:** Hostetler Lawn & Landscaping Inc → HOSTETLER LAWN & LANDSCAPING, I; 1988-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hostetler Ronald → HOSTETLER LAWN & LANDSCAPING, I; 1988-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hostetler Ronald → Hostetler Lawn & Landscaping Inc; 1988-04-01 to current/open; source msha-controller-operator-history