# Relationship history for MSHA mine 2103206

Current hierarchy: **LuVerne R  Sondrol → Sondrol Excavating Inc. → Crusher**

- 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:** Sondrol Excavating Inc. → Crusher; 1999-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** LuVerne R  Sondrol → Crusher; 1999-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** LuVerne R  Sondrol → Sondrol Excavating Inc.; 1999-07-01 to current/open; source msha-controller-operator-history