# Relationship history for MSHA mine 4700918

Current hierarchy: **Raymond W  Fricke; James H  Fricke → R & J Fricke, Inc. → R & J Fricke, Inc.**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** R & J Fricke Inc → R & J Fricke, Inc.; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Raymond W  Fricke  et al → R & J Fricke, Inc.; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Raymond W  Fricke  et al → R & J Fricke Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James H  Fricke  et al → R & J Fricke Inc; 1950-01-01 to current/open; source msha-controller-operator-history