# Relationship history for MSHA mine 3609883

Current hierarchy: **Louis A  Kralicek → Kralicek's Stone → Kralicek's Stone**

- 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:** Louis A  Kralicek → Kralicek's Stone; 2001-09-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kralicek's Stone → Kralicek's Stone; 2010-09-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Louis A  Kralicek → Kralicek's Stone; 2010-09-22 to current/open; source msha-controller-operator-history