# Relationship history for MSHA mine 2200176

Current hierarchy: **W J  Runyon Jr → W J Runyon & Son Inc → HIGHWAY 27 GRAVEL PIT**

- 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:** W J Runyon & Son Inc → HIGHWAY 27 GRAVEL PIT; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** W J  Runyon Jr → HIGHWAY 27 GRAVEL PIT; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** W J  Runyon Jr → W J Runyon & Son Inc; 1950-01-01 to current/open; source msha-controller-operator-history