# Relationship history for MSHA mine 3800390

Current hierarchy: **Ronald S  Banks; Gary C  Banks; G Reid  Banks → Banks Construction Company → County Mines**

- 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:** Banks Construction Company → County Mines; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ronald S  Banks  et al → County Mines; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald S  Banks  et al → Banks Construction Company; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary C  Banks  et al → Banks Construction Company; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** G Reid  Banks et al → Banks Construction Company; 1950-01-01 to current/open; source msha-controller-operator-history