# Relationship history for MSHA mine 2302398

Current hierarchy: **Tim  Tesreau; William D  Watkins → Current River Gravel and Ready Mix → Watkins 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:** Current River Gravel and Ready Mix → Watkins Gravel Pit; 2009-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tim  Tesreau et al → Watkins Gravel Pit; 2009-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim  Tesreau et al → Current River Gravel and Ready Mix; 2009-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William D  Watkins et al → Current River Gravel and Ready Mix; 2009-05-19 to current/open; source msha-controller-operator-history