# Relationship history for MSHA mine 0301850

Current hierarchy: **Searcy County-Ar → Searcy County Road Department → Searcy County Mine**

- 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:** Searcy County-Ar → Searcy County Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gravel Mountain Quarry → Searcy County Mine; 2001-03-01 to 2001-04-03; source msha-controller-operator-history
- **controller_controls_mine:** Gary  Ausley → Searcy County Mine; 2001-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Ausley → Gravel Mountain Quarry; 2001-03-01 to 2001-04-03; source msha-controller-operator-history
- **operator_operates_mine:** Searcy County Road Department → Searcy County Mine; 2001-04-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Searcy County-Ar → Searcy County Road Department; 2001-04-04 to current/open; source msha-controller-operator-history