# Relationship history for MSHA mine 3200859

Current hierarchy: **John  Dunlap → CHI Industries, LLC → Pit 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:** CHI Industries, LLC → Pit 1; 2010-04-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John  Dunlap → Pit 1; 2010-04-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Dunlap → CHI Industries, LLC; 2010-04-19 to current/open; source msha-controller-operator-history